Journal articles: 'Colocasia'

1

Lin, Shih-Yao, Asif Hameed, Yi-Han Hsu, You-Cheng Liu, Mei-Hua Hung, Wei-An Lai, and Chiu-Chung Young. "Sphingomonas colocasiae sp. nov., isolated from taro (Colocasia esculanta)." International Journal of Systematic and Evolutionary Microbiology 68, no. 1 (January 1, 2018): 133–40. http://dx.doi.org/10.1099/ijsem.0.002471.

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Anbalagan, Thirugnanavel, Bidyut C. Deka, Sethuraman Sivakumar, Lily Rangnamei, and Naksungla Walling. "Colocasia (Colocasia esculenta L.) in Northeast India." Journal of Innovative Agriculture 9, no. 1 (March 31, 2022): 1. http://dx.doi.org/10.37446/jinagri/mra/9.1.2022.1-7.

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Vetukuri, Ramesh R., Sandeep K. Kushwaha, Diya Sen, Stephen C. Whisson, Kurt H. Lamour, and Laura J. Grenville-Briggs. "Genome Sequence Resource for the Oomycete Taro Pathogen Phytophthora colocasiae." Molecular Plant-Microbe Interactions® 31, no. 9 (September 2018): 903–5. http://dx.doi.org/10.1094/mpmi-12-17-0321-a.

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Phytophthora colocasiae is a phytopathogenic oomycete that causes leaf blight and corm rot on taro (Colocasia esculenta), an important staple crop in the tropics. The impact of P. colocasiae is a serious concern for food security in Asian and Oceanic regions. Vietnamese strain 7290 of P. colocasiae was sequenced (Illumina) to assemble a draft genome of 56.6 Mb, comprised of 19,853 scaffolds and 19,984 predicted protein-coding genes. As in other Phytophthora species, P. colocasiae possesses numerous pathogenicity-related genes, such as the RxLR class of effectors. This draft genome sequence of P. colocasiae provides a resource to underpin the first steps in determining the molecular mechanisms of disease development in this pathosystem.

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Ugwuja, Faustina Njideka, Chiemeka Nwakaego Onaebi, Nneka Virginia Chiejina, and Kelvin Ikechukwu Ugwuoke. "Severity of Phytophthora leaf blight disease and susceptibility of two local varieties of Colocasia to Phytophthora colocasiae Raciborski in Nsukka zone of South Eastern Nigeria." Bio-Research 19, no. 2 (September 21, 2021): 1286–96. http://dx.doi.org/10.4314/br.v19i2.2.

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Leaf-blight disease of Colocasia caused by Phytophthora colocasiae Raciborski has been a serious impediment to cocoyam production in Nigeria. Disease severity and susceptibility of the two most cultivated local varieties “Ugwuta” (Colocasia esculenta var. antiquorum) and “Nkashi Colocasia esculenta var. esculenta) were investigated. Disease severity was visually estimated as the percentage leaf surface affected by blight, lesion or lesion-related chlorosis for each leaf of a plant using a seven-point scale of 0, 5, 10, 25, 50, 75 and 100% in three locations: Ede-Oballa, Nsukka Urban and Obukpa. Susceptibility was assessed on 2 months old potted plants of each variety inoculated with a 7-day old culture of P. colocasiae. Diameters of lesions on inoculated leaves were recorded from the 3rd - 8th day after inoculation. Data on severity were subjected to ANOVA and susceptibility of the varieties was compared with t-test. Results revealed significant LSD=4.96 (0.05) and varying degrees of leaf blight severity among varieties and locations. Variety antiquorum had significantly higher severities of 42.08, 46.40 and 47.42% at Ede-Oballa, Nsukka Urban and Obukpa respectively, compared to 34.85, 36.55 and 28.19% recorded by var. esculenta at these locations, respectively. Similarly, var. antiquorum had greater lesion diameter ranging from 0.65±0.07 cm - 3.70±0.14 cm and average diameter of 2.4±0.16cm compared to var. esculenta which had 0.41±0.14cm - 3.12±0.19 cm and average diameter of 1.80±0.16. This research has shown that varieties and locations affect the severity and susceptibility of Phytophthora leaf blight disease. This could be a guide to farmers having known that var. esculenta is less severe to Phytophthora leaf blight disease.

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Sahoo, Manas Ranjan, Madhumita Dasgupta, Paresh Chandra Kole, and Archana Mukherjee. "Biochemical Changes in Leaf Tissues of Taro [Colocasia esculentaL. (Schott)] Infected withPhytophthora colocasiae." Journal of Phytopathology 158, no. 3 (March 2010): 154–59. http://dx.doi.org/10.1111/j.1439-0434.2009.01599.x.

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Wattanasuepsin, Watsapon, Bungonsiri Intra, Akira Také, Yuki Inahashi, Jirayut Euanorasetr, Satoshi Ōmura, Atsuko Matsumoto, and Watanalai Panbangred. "Saccharomonospora colocasiae sp. nov., an actinomycete isolated from the rhizosphere of Colocasia esculenta." International Journal of Systematic and Evolutionary Microbiology 67, no. 11 (November 1, 2017): 4572–77. http://dx.doi.org/10.1099/ijsem.0.002336.

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Nath, Vishnu Sukumari, Moochatil Rajitha, Sree Sankar Darveekaran, Vinayaka Mahabaleswar Hegde, Muthulekshmi Lajapathy Jeeva, Raj Shekar Misra, Syamala Swayamvaran Veena, Neetha Soma John, Indira Parameswaran Anjanadevi, and Mithun Raj. "Identification of Phytophthora colocasiae genes differentially expressed during infection on taro (Colocasia esculenta)." Physiological and Molecular Plant Pathology 89 (January 2015): 78–86. http://dx.doi.org/10.1016/j.pmpp.2015.01.001.

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Maga, Joseph A., Ming Bang Liu, and Timothy Rey. "Taro (Colocasia esculenta) extrusion." Carbohydrate Polymers 21, no. 2-3 (January 1993): 177–78. http://dx.doi.org/10.1016/0144-8617(93)90014-u.

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Zhou, Shi-Shun, Rui-Chang Quan, Ren Li, Qiang Liu, and Jian-Tao Yin. "Colocasia kachinensis, a new species of Araceae from Myanmar." PhytoKeys 138 (January 10, 2020): 41–47. http://dx.doi.org/10.3897/phytokeys.138.36769.

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Colocasia kachinensis S.S. Zhou & J.T. Yin, is described and illustrated as a new species of Araceae from Kachin, Mynamar. The morphological characters are compared to those of other Colocasia species. Colocasia kachinensis is closely related to C. menglaensis J.T Yin, H. Li & Z.F. Xu, 2004, but differs from in having an erect stem, no stolons, smaller size, a different pattern of surface bristle distribution and male flowers 1–4-androus with stamens connate in truncate synandrium.

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Vásquez-López, A., R. E. Palacios-Torres, L. B. Montiel-Frausto, V. R. Medero Vega, N. B. Lima, M. Camacho-Tapia, and J. M. Tovar-Pedraza. "First Report of Cladosporium colocasiae Causing Leaf Spot on Taro (Colocasia esculenta) in Mexico." Plant Disease 102, no. 12 (December 2018): 2649. http://dx.doi.org/10.1094/pdis-04-18-0606-pdn.

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Bandyopadhyay, R., K. Sharma, T. J. Onyeka, A. Aregbesola, and P. Lava Kumar. "First Report of Taro (Colocasia esculenta) Leaf Blight Caused by Phytophthora colocasiae in Nigeria." Plant Disease 95, no. 5 (May 2011): 618. http://dx.doi.org/10.1094/pdis-12-10-0890.

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In November 2009, many farmers in Abia State were alarmed by complete destruction of their taro (Colocasia esculenta (L.) Schott.) crop. Symptoms, suggestive of leaf blight caused by Phytophthora colocasiae Raciborski (2), began as small, brown, water-soaked lesions that rapidly enlarged to form large, dark brown, coalescing lesions, sometimes with orange host exudations. White sporulation was evident on the lesion surface under wet conditions. The pathogen caused rapid defoliation and killed plants. The epidemic was widespread in 2010 during the rainy season (April to November) in all taro-growing areas of Nigeria. Diseased leaves were collected from taro in Iwo Village near Ibadan, cut into 4-cm2 pieces, washed in several changes of sterile water, and incubated in petri dishes lined with wet filter paper at 22°C. Newly produced sporangia were collected from the incubated leaves and plated on a selective medium (1). Sporangia were hyaline, papillate, and measured 25 to 55 × 15 to 30 μm. Zoospores encysted within 30 min after release; cysts were 9.7 to 19.5 μm in diameter. Sporangia and zoospore formation were induced in water and by chilling, respectively (1). Two leaves each of three 1-month-old taro and three Xanthosoma plants (both unknown clones) and six detached leaves of taro were inoculated with a 1 × 105/ml zoospore suspension of isolates PC01 and PC02. Detached leaves were incubated in moist chambers at 22°C. Plants were covered with polyethylene bags for 12 h after inoculation and maintained in a screenhouse. Water-soaked lesions appeared on detached leaves within 24 h postinoculation and the leaves were completely rotted 48 h later. All inoculated attached leaves of taro, but not Xanthosoma, showed typical leaf blight symptoms including abundant sporangial production. Noninoculated control detached leaves and plants were disease free. Sporangia from detached and attached inoculated leaves, when plated on selective medium, produced typical P. colocasiae colonies. The internal transcribed spacer (ITS) region of rDNA was amplified using the ITS1 and ITS4 primers (3). Amplicons (786 bp) were sequenced in both directions and submitted to GenBank (Accession Nos. HQ602756, HQ602757, HQ602758, and HQ602759). A BLASTn search revealed 99% similarity to a P. colocasiae strain of the Pacific Region (Accession No. GU111604), but only 94% similarity to a P. colocasiae strain from India (Accession No. GQ202149). The sequence analysis, morphological characteristics, and pathogenicity test confirmed the taro leaf blight pathogen as P. colocasiae. There are previous reports of occurrence of taro blight-like disease attributed to P. colocasiae in Ethiopia, Equatorial Guinea (1), and more recently in Cameroon, but comprehensive details on pathogen or disease are not available. To our knowledge, this is the first confirmed record in Nigeria of P. colocasiae causing taro blight. This disease poses a serious threat to the production and biodiversity of this important food crop. Urgent interventions are necessary to halt this emerging epidemic in West and Central Africa. References: (1) Phytophthora colocasiae, In: CABI-Crop Protection Compendium. CAB International, Wallingford, UK, 2005. (2) P. S. Tsao. Page 219 in: Phytophthora: Its Biology, Taxonomy, Ecology and Pathology. The American Phytopathological Society. St. Paul, MN, 1983. (3) T. J. White et al. Page 315 in: PCR Protocol: A Guide to Methods and Applications. Academic Press, London. 1990.

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12

Pieniazek, Facundo, Madhumita Dasgupta, Valeria Messina, Mayengbam Premi Devi, Yumnam Indrani Devi, Sansuta Mohanty, Satyapriya Singh, et al. "Differential Occurrence of Cuticular Wax and Its Role in Leaf Physiological Mechanisms of Three Edible Aroids of Northeast India." Agriculture 12, no. 5 (May 21, 2022): 724. http://dx.doi.org/10.3390/agriculture12050724.

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The localization of cuticular wax (CW) on the leaf epidermis and its interaction with the physiological mechanisms of three edible aroids, Alocasia, Colocasia, and Xanthosoma, were assessed. CW in the leaf tissues was visualized using scanning electron microscopy, which was higher in Colocasia (10.61 mg·dm−2) and Xanthosoma (11.36 mg·dm−2) than in Alocasia (1.36 mg·dm−2). Colocasia CW exhibited superhydrophobic properties with a higher static contact angle (CA) (>150°) than Xanthosoma (99.0°) and Alocasia (128.7°). The higher CW in Colocasia and Xanthosoma resulted in better leaf chlorophyll stability, moisture retention ability, and cellular membrane integrity compared to Alocasia. CW acted as a protecting barrier against deleterious solar radiation in terms of sun protection factor (SPF). The glossy appearance of wax crystals in the Alocasia leaf cuticles resulted in higher SPF. Overall, Colocasia CW highly influenced the qualitative and protective mechanisms of the leaf. Our study sheds light on the pivotal role of CW in the physiological properties of aroid leaves, which would be useful for the selection of wax-rich plants for augmenting future breeding strategies. The information would also be useful for further exploration of the industrial potential of superhydrophobic wax crystals obtained from edible aroids.

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13

Rustiani, Erni, Aulia Fitriani, and Sri Wardatun. "Analysis of Flavonids and Terpenoids in Ethanol Extract of Colocasia esculenta L. (Schoot) Stalk and Leaves." Journal of Tropical Pharmacy and Chemistry 5, no. 4 (December 25, 2021): 359–64. http://dx.doi.org/10.25026/jtpc.v5i4.349.

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Colocasia esculenta L. (Schoot) is a widely used plant in developing countries in Asia, Africa, and Central America. The parts of the Colocasia plant that can be used are the tubers, stalks, and leaves. There has not been much research on the content of this plant. The study aims to determine the flavonoids and terpenoids in the ethanol extract of Colocasia stalk and leaves. The maceration method with 70% ethanol solvent and drying with vacuum evaporator. Determination of flavonoid levels based on quercetin marker compounds using AlCl3 reagent by UV-Vis spectrophotometry. The terpenoid levels were carried out gravimetrically with petroleum ether as a solvent. The results showed that the ethanol extract of Colocasia stalk and leaf contained flavonoids, respectively 3.18 +0.0581% and 4.33 +0.0285%, while the results of the terpenoid levels for stalks were 7.10 +0.0676% and leaves were 8.39 +0.0023%.

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Thombare, Pratibha, and Farooqui H. Farzana. "Development of Value Added Food Products with Incorporation of Colocasia Leaves (Colocasia esculenta)." International Journal of Current Microbiology and Applied Sciences 7, no. 11 (November 10, 2018): 2851–57. http://dx.doi.org/10.20546/ijcmas.2018.711.328.

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15

Ravindran, V., R. Sivakanesan, and H. W. Cyril. "Nutritive value of raw and processed colocasia (Colocasia esculenta) corm meal for poultry." Animal Feed Science and Technology 57, no. 4 (March 1996): 335–45. http://dx.doi.org/10.1016/0377-8401(95)00861-6.

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Mellow, Kieran D., Joy L. Tyson, Robert A. Fullerton, Angelika Tugaga, Fa'alelei Tunupopo, and Amy Maslen-Miller. "Mating types of Phytophthora colocasiae on the island of Upolu, Samoa." New Zealand Plant Protection 71 (June 27, 2018): 289–92. http://dx.doi.org/10.30843/nzpp.2018.71.143.

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Taro leaf blight (TLB) caused by Phytophthora colocasiae is a damaging disease that destroyed Samoa’s taro industry following its introduction in 1993. The aim of this study was to determine the occurrence of the A1 and A2 mating types of P. colocasiae for a more comprehensive understanding of the risk the pathogen poses for the future of the taro industry in Samoa. In September 2015, 54 isolates of P. colocasiae were collected from taro leaf blight lesions from 13 farms around the island of Upolu, Samoa. The mating types of each isolate was determined by observation of oospore formation when paired with tester isolates of Phytophthora nicotianae of known mating types (A1 or A2). Fifty isolates were found to be A2 mating type and four did not form oospores with either mating type. No A1 or self-fertile isolates were found. These results suggest that the A1 mating type has not been introduced to the island of Upolu, preventing the formation of oospores between compatible mating types of P. colocasiae and lessening the risk of new and potentially more threatening genotypes of the pathogen from emerging through genetic recombination. Keywords taro leaf blight, Colocasia esculenta, taro, sexual reproduction

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Amagloh, FK, and ES Nyarko. "Mineral nutrient content of commonly consumed leafy vegetables in northern Ghana." African Journal of Food, Agriculture, Nutrition and Development 12, no. 53 (August 3, 2012): 6397–408. http://dx.doi.org/10.18697/ajfand.53.10840.

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Leafy vegetables serve as the base of soups, a significant component of Ghanaian food recipes. The varying climatic conditions across Ghana and inefficient food distribution channels have resulted in the existence of different food crops in different regions. Anecdotally, Ghanaians generally believe that the consumption of Colocasia esculenta leaf improves iron status. In this study, the levels of mineral nutrients: calcium (Ca), iron (Fe), potassium (K), magnesium (Mg), manganese (Mn), sodium (Na) and zinc (Zn) in the leaves of Hibiscus sabdariffa, Amaranthus spinosus, Hibiscus cannabinus, Solanum macrocapon and Vigna unguiculata that are popularly used in food recipes in northern Ghana (compose of the Northern, Upper East and Upper West Regions), were compared with the levels in Colocasia esculenta leaf. The leafy vegetables/greens consumed in northern Ghana were sourced from market centres in the Northern and Upper East Regions (savannah zone); Colocasia esculenta leaf was obtained from market centres in Ashanti Region (forest zone). The leaves were shredded and air-dried for 7 days. The dried leaves were ground and analysed for the mineral nutrients using Instrumental Neutron Activation Analysis. The Ca content of Hibiscus sabdariffa was significantly higher than that of Colocasia esculenta by 1.07-fold difference (p<0.05). However, compared with Amaranthus spinosus, Hibiscus cannabinus, Solanum macrocapon and Vigna unguiculata, the level of Ca in the Colocasia esculenta leaf was 1.23- to 1.84-fold significantly higher (p<0.05). The Fe level in the leafy vegetables commonly consumed in northern Ghana was significantly lower (2.92- to 70.60-fold difference, p<0.0001) compared with the Colocasia esculenta leaf. Significant differences (p<0.05) were also observed in the levels of K, Mg and Zn between the other greens studied and the Colocasia esculenta leaf. The differences were between 1.17- to 1.48-fold (K), 1.08- to 1.54-fold (Mg) and 1.15- to 2.59-fold (Zn). This study shows that the leafy vegetables commonly consumed in northern Ghana contain lower levels of the selected mineral nutrients analysed compared with those of Colocasia esculenta leaf. There is a need to find alternative greens that are available or could be cultivated in this part of the country.

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Calle, Jehannara, Yaiza Benavent-Gil, and Cristina M. Rosell. "Influence of the Use of Hydrocolloids in the Development of Gluten-Free Breads from Colocasia esculenta Flour." Proceedings 53, no. 1 (August 5, 2020): 6. http://dx.doi.org/10.3390/proceedings2020053006.

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Colocasia esculenta represents an alternative non-gluten ingredient due to its healthy properties. The objective of this study was to explore the breadmaking potential of Colocasia spp. cormel flour combined with hydrocolloids (hydroxypropyl methylcellulose, xanthan gum, guar gum). A total of three formulations were tested. Breads were characterized by assessing their technological qualities: moisture, specific volume, volume, hardness and weight loss. The quality parameters were similar to other gluten-free breads. Overall, Colocasia spp. flour can be used to produce gluten-free breads with similar technological quality parameters than those previously reported with common gluten-free flours.

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Mbi, Tabi Kingsley, Godswill Ntsomboh-Ntsefong, Libert Brice Tonfack, and Emmanuel Youmbi. "Field management of Taro (Colocasia esculenta (L.) Schott) leaf blight via fungicidal spray of foliage." Journal of the Cameroon Academy of Sciences 16, no. 3 (April 19, 2021): 197–208. http://dx.doi.org/10.4314/jcas.v16i3.2.

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Taro leaf blight (TLB) epidemic hit Cameroon for the first time in 2009. Since then, the disease is persistent and its typical devastating legacy is threatening Taro (Colocasia esculenta) in the North and South West Regions of Cameroon. This study was initiated with the objective to determine the potentials of some fungicides to control TLB. The experimental design was completely randomized with a 3x15x2 factorial, including 3 treatments: T1 (Callomil plus72WP), T2 (Mancoxyl plus 720WP) and T3, 1:1 ratio T1 + T2 all applied at concentrations of 4g/L; 15 repetitions and 2 planting seasons (dry season i.e. October 2014 – March 2015 and rainy season i.e. April-October 2015). Disease incidence and disease severity were used to evaluate the disease progression while corm yield was used to appraise the economic injury. The results revealed disease incidence of 0% during the dry season and 18.2%, 27.3% and 100%, for T1, T2 and T3 and control during rainy season respectively. Disease severity was 75% in control and only 1% for the different treatments. Corm yield in the rainy season was 17.4kg, 15.08kg, 14.27kg and 5.89kg for T1, T2, T3 and control respectively. This study suggests that TLB epidemic can effectively be managed by foliage spray with Metalaxyl containing fungicides at a weekly dosage of 4g/L. Key words: Chemical control, Colocasia esculenta, Epidemic, Phytopathology, Phytophthora colocasiae

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Paiva, Waldelice Oliveira de, and José Maria Thomaz Menezes. "COMPORTAMENTO AGRONÔMICO DE CLONES DE INHAMES OU COLOCASIA (COLOCASIA SP.) NO ESTADO DE RONDÔNIA." Acta Amazonica 22, no. 2 (June 1992): 191–95. http://dx.doi.org/10.1590/1809-43921992222195.

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Os experimentos foram instalados em Rondônia, nos municípios de Ouro Preto D'Oeste e Vilhena, em agosto de 1984. foram testados 5 acessos pertencentes ao BAG - Aráceas comestíveis, sendo todos do gênero colocaeia. Em Ouro Preto D'Oeste, todos os acessos apresentaram excelente produtividade, variando de 28 a 39 t/ha. Em Vilhena a produtividade apresentou variação entre 28 a 30 t/ha. Não foram detectadas diferenças significativas entre os acessos em nenhuma das localidades.

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Thombare, Pratibha, and Farooqui H. Farzana. "Organoleptic Evaluation of Dried Colocasia Leaves (Colocasia esculenta) Powder Incorporated in Kharapara and Puri." International Journal of Current Microbiology and Applied Sciences 7, no. 11 (November 10, 2018): 2844–50. http://dx.doi.org/10.20546/ijcmas.2018.711.327.

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Onyilagha, J. C., A. S. Omenyi, H. C. Illoh, and J. Lowe. "Colocasia esculenta (L.) Schott, Colocasia antiquorum Schott, how many species? 1. A preliminary investigation." Euphytica 36, no. 2 (1987): 687–92. http://dx.doi.org/10.1007/bf00041519.

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Omeje, T. E., S. U. Awere, and J. O. Adinde. "Weed Management Strategies in Colocasia esculenta Field Caused by Phytophthora colocasiae and Global Climate Change." International Journal of Agricultural Research 17, no. 2 (February 15, 2022): 62–69. http://dx.doi.org/10.3923/ijar.2022.62.69.

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Omane, E., K. A. Oduro, E. W. Cornelius, I. Y. Opoku, A. Y. Akrofi, K. Sharma, P. Lava Kumar, and R. Bandyopadhyay. "First Report of Leaf Blight of Taro (Colocasia esculenta) Caused by Phytophthora colocasiae in Ghana." Plant Disease 96, no. 2 (February 2012): 292. http://dx.doi.org/10.1094/pdis-09-11-0789.

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Taro (Colocasia esculenta (L.) Schott) is an important food crop cultivated for its edible tubers in Ghana. In May 2009, outbreaks of a destructive leaf disease were observed on several taro farms in the Atiwa, East-Akim, Fanteakwa, West-Akim, and New Juaben districts of the Eastern Region of Ghana. Symptoms began on leaves as small, brown, water-soaked lesions that enlarged and coalesced into large lesions with yellow exudate, ultimately leading to the defoliation and death of plants. Symptoms were suggestive of taro leaf blight (TLB) caused by Phytophthora colocasiae Raciborski (3). By August 2010, the disease had spread to other taro-growing regions in Ghana. To identify the pathogen, leaf tissue from lesion margins were excised and plated on carrot agar and V8 selective media for Phytophthora and incubated at 27°C for 5 days (2). Growth from diseased tissue was used for morphological characterization. Sporangia were ovoid, hyaline, papillate, caducous, 30 to 60 × 17 to 28 μm, and pedicels were 3.5 to 10 μm long. Genomic DNA was isolated from pure cultures of two isolates, PCg11-2 from Oseim (6°15′N, 0°27′E) and PCg11-5 from Oyoko (6°8′N, 0°17′W). Ribosomal DNA ITS1, 5.8S and ITS2 were amplified by PCR using the ITS1 and ITS4 primers (4). The resultant 784-bp amplicons were sequenced (GenBank Accession Nos. JN662439 and JN662440). Sequences of both isolates were identical. A BLASTn search of these sequences revealed maximum homology of 99% with the sequence of P. colocasiae strains from blighted taro leaves in Nigeria (GenBank Accession No. HQ602756), Hawaii (GenBank Accession No. GU258997), and several strains in Asia and the South Pacific. On the basis of morphological characteristics and nucleotide homology, the isolates were identified as P. colocasiae. To fulfill Koch's postulates, 30 leaf discs from 3-month-old plants were inoculated with 10 μl of a suspension of 3 × 105 zoospores per ml (2). Leaf discs were incubated in the dark at 27°C on wet foam in plastic trays for 5 days. All inoculated discs developed blight symptoms similar in appearance to those observed on diseased taro in the fields. Control discs remained asymptomatic. P. colocasiae was reisolated from leaf discs and its identity confirmed by morphological characteristics. To our knowledge, this is the first report of TLB and P. colocasiae in Ghana. Occurrence of TLB was recently reported in Nigeria (1). The recent occurrence of TLB in both Nigeria and Ghana threaten the taro-growing regions of West and Central Africa. Disease surveys and a management strategy that includes resistant varieties are urgently needed. References: (1) R. Bandyopadhyay et al. Plant Dis. 95:618, 2011. (2) A. Drenth and B. Sendall. Practical Guide to Detection and Identification of Phytophthora. Version 1.0. CRC for Tropical Plant Protection. Brisbane, Australia, 2001. (3) M. Raciborski. Java Batavia Bull. 19:189, 1900. (4) T. J. White et al. Page 315 in: PCR Protocols: A Guide to Methods and Applications. M. A. Innis et al., eds. Academic Press, San Diego, CA, 1990.

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NISHIMURA, Norio, and Kazuichi KUDO. "Fusarium oxysporum f. sp. colocasiae n. f. sp. Causing Dry Rot of Taro (Colocasia esculenta)." Japanese Journal of Phytopathology 60, no. 4 (1994): 448–53. http://dx.doi.org/10.3186/jjphytopath.60.448.

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Mishra, Ajay Kumar, Kamal Sharma, and Raj Shekhar Misra. "Purification and characterization of elicitor protein from Phytophthora colocasiae and basic resistance in Colocasia esculenta." Microbiological Research 164, no. 6 (November 2009): 688–93. http://dx.doi.org/10.1016/j.micres.2008.09.001.

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Wahyuni, Wahyuni, Hilmiati Wahid, and Resti Febriana. "FORMULASI KRIM EKSTRAK ETANOL TANGKAI DAUN TALAS(COLOCASIA ESCULENTA L.) TERHADAP LUKA SAYAT PADA TIKUS PUTIH (RATTUS NORVEGICUS) GALUR WISTAR." Jurnal Kesehatan Tambusai 3, no. 3 (August 11, 2022): 338–47. http://dx.doi.org/10.31004/jkt.v3i3.5721.

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Salah satu tanaman yang dapat menjadi pilihan sebagai obat penyembuhan luka yaitu tangkai daun talas (Colocasia esculenta L.) Kandungan fitokimia tangkai daun talas yaitu flavonoid, tanin, alkaloid, saponin, steroid, dan terpenoid diduga mampu membantu menyembuhkan luka. Tujuan Penelitian yaitu untuk mengetahui ekstrak etanol tangkai daun talas (Colocasia esculenta L.) yang dapat diformulasikan menjadi sediaan krim serta stabil secara fisik dan kimia serta untuk mengetahui konsentrasi optimal formula sediaan krim ekstrak etanol tangkai daun talas (Colocasia esculenta L.) yang digunakan sebagai penyembuhan luka sayat pada tikus putih (Rattus norvegicus) galur wistar. Metode penelitian ini yaitu eksperimen laboratorium menggunakan ekstrak etanol tangkai daun talas (Colocasia esculenta L.) yang diformulasikan menjadi sediaan krim pada konsentrasi 5%, 10% dan 15 % dengan desain Pretest-Posttest dengan kelompok eksperimen dan kontrol. Hasil penelitian menunjukkan Uji organoleptis, uji homogenitas, uji daya lekat, uji daya sebar, uji pH, uji Viskositas sebelum dan sesudah cycling test memenuhi persyaratan dan stabil. Pada uji efektivitas penyembuhan luka sayat pada tikus putih (Rattus norvegicus) pada 15 hewan uji yang dibagi dalam lima kelompok menunjukkan bahwa pada konsentrasi 15 % yang memberikan efektivitas penyembuhan luka sayat yang paling cepat selama 14 hari pengukuran. Dapat disimpulkan bahwa Ekstrak etanol tangkai daun talas talas (Colocasia esculenta L.) dapat diformulasikan dalam sediaan krim serta stabil secara fisik dan kimia dengan konsentrasi paling optimal formula sediaan krim yang dapat digunakan untuk penyembuhan luka sayat yaitu formula sediaan krim dengan konsentrasi 15%.

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Salé Charles, Essomé, Ngoh Dooh Jules Patrice, Heu Alain, Ndogho Pegalepo Angèle, Ngatsi Zemko Patrice, Chewachong Godwill, and Ambang Zachee. "Évaluation des activités antifongiques des extraits de graines de Thevetia peruviana contre Phytophthora colocasiae (Oomycètes) agent causal du mildiou du taro (Colocasia esculenta (L.) Schott) au Cameroun." Journal of Applied Biosciences 151 (July 31, 2020): 15584–97. http://dx.doi.org/10.35759/jabs.151.7.

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Objectif : Le mildiou du taro dû à Phytophthora colocasiae est l’affection la plus importante de cette culture au Cameroun depuis près d’une décennie. Cette étude a été réalisée pour évaluer l’activité antifongique des extraits des graines du laurier jaune scéniquement appelé Thevetia peruviana (Appocynacées) sur le développement in vitro de P. colocasiae et in vivo sur les fragments des feuilles infectées artificiellement. Méthodologie et résultats : les extraits de T. peruviana ont été préparés à partir des solvants : eau, méthanol, acétone et acétate d’éthyle aux concentrations respectives de 12,5 ; 25 ; 50 et 100 mg/ml. Une solution de 20 µl des fructifications de P. colocasiae isolé des feuilles infectées du cultivar de taro «Macumba» puis cultivé sur milieu V8-Agar, a été utilisée à une concentration de 5x104 sporanges/ml. Pour les tests in vitro, des explants de P. colocasiae d’environ 0,8 cm de diamètre ont été déposés dans des boîtes de Pétri stériles contenant le milieu PDA supplémenté avec les différentes concentrations d’extraits, et mises en incubation à 23±1°C pendant sept jours pour l’évaluation de la croissance radiale. La sensibilité in vivo du pathogène aux extraits s’est faite sur des fragments de feuilles de taro par application de 20 µl de suspension sporangiale de P. colocasiae suivie de 20 µl d’extrait. Les résultats obtenus in vitro ont montré que les extraits aqueux, méthanoliques et à l’acétate d’éthyle ont totalement inhibé la croissance de l’agent pathogène à 25 mg/ml, tandis que l’extrait à l’acétone a inhibé la croissance à 12,5 mg/ml. Les fragments de feuilles inoculés au champignon et traités à l’extrait à l’acétone n’ont pas développé les symptômes du mildiou après cinq jours d’inoculation du pathogène. Conclusion et application potentielle : L’extrait des graines de T. peruviana à l’acétone à la dose de 12,5 mg/ml a inhibé totalement la croissance radiale de P. colocasiae in vitro. Cet extrait s’est révélé efficace contre P. colocasiae et peut donc constituer une alternative de lutte contre le mildiou du taro. L’activité de cet extrait était comparable à celle du fongicide synthétique de référence (le Callomil plus 72 WP) utilisé. Les extraits bruts des graines de T. peruviana renfermeraient un grand nombre de composés bioactifs, qui une Essomé et al., J. Appl. Biosci. 2020 Évaluation des activités antifongiques des extraits de graines de Thevetia peruviana contre Phytophthora colocasiae (Oomycètes) agent causal du mildiou du taro (Colocasia esculenta (L.) Schott) 15585 fois purifiés, pourraient présenter une activité antifongique assez levée au même titre que les fongicides synthétiques. Cette étude préliminaire constitue une base pour des essais futurs dans les conditions naturelles. Mots clés : extraits bruts, Thevetia peruviana, activités antifongiques, Phytophthora colocasiae, Colocasia esculenta. ABSTRACT Evaluation of antifungal activities of Thevetia peruviana extracts against Phytophthora colocasiae, causal agent of late blight of taro (Colocasia esculenta (L.) Schott) in Cameroon. Objective: Taro leaf blight caused by Phytophthora colocasiae is the most devastating disease in taro production in Cameroon for one decade now. This study was conducted to evaluate the antifungal activities of extracts from Thevetia peruviana (yellow oleander) seeds on the in vitro growth of the fungus as well as on detached taro leaf fragments infected artificially. Methodology and Results: Aqueous, methanolic, acetone and ethlyl acetate extracts of T. peruviana were prepared and used at concentrations of 12.5, 25, 50 and 100 mg / ml. P. colocasiae was isolated from an infected taro leaf cultivar "Macumba or Ibo coco" in V8 agar medium and maintained in pure culture from which a suspension of 5 x 104 sporangia/ml was prepared. Mycelial fragments of P. colocasiae of about 0.8 cm in diameter were cut and placed in sterile Petri dishes containing Potato Dextrose Agar (PDA) medium supplemented with different concentrations of plant extracts and incubated at 23±1°C for seven days for the evaluation of the radial growth. In vivo sensitivity of the pathogen to plant extracts was done by application of 20 µl of sporangial suspension on taro leaves followed by 20 µl of each extract. The results obtained showed that the methanolic, ethyl acetate, and aqueous extracts completely inhibited the growth of the pathogen at 25 mg/ml while total inhibition of the pathogen was obtained with acetone extract at 12.5 mg/ml. No symptoms were observed on leaf fragments that received a drop of the fungus and acetone extract. Conclusion and potential application: The acetone extract at the concentration of 12.5 mg/ml totally inhibited the in vitro radial growth of P. colocasiae and significantly delayed the development of the disease on leaf fragments. This extract, active against P. colocasiae could be used as alternative to fungicides for the control of taro leaf blight. This activity was comparable to that of the reference fungicide used: Callomil plus 72 WP. These extracts are still crude and may contain a large number of different compounds, which after purification could present even a better activity than the fungicides used. This preliminary study provides a base line for future trials in natural conditions in greenhouse and in the field. Keywords: Crude extracts, Thevetia peruviana, antifungal activities, Phytophthora colocasiae, taro.

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He, Xiaoling, Susan C. Miyasaka, Maureen M. M. Fitch, Sawsan Khuri, and Yun J. Zhu. "Taro (Colocasia esculenta) Transformed with a Wheat Oxalate Oxidase Gene for Improved Resistance to Taro Pathogen Phytophthora colocasiae." HortScience 48, no. 1 (January 2013): 22–27. http://dx.doi.org/10.21273/hortsci.48.1.22.

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Production of taro [Colocasia esculenta (L.) Schott], a tropical root crop, is declining in many areas of the world as a result of the spread of diseases such as Taro leaf blight (TLB). Taro cv. Bun Long was transformed through Agrobacterium tumefaciens with the oxalate oxidase (OxO) gene gf2.8 from wheat (Triticum aestivum). Insertion of this gene was confirmed by polymerase chain reaction (PCR) and Southern blot analysis. One independent transformed line contained one gene insertion (g5), whereas a second independent line contained four copies of the gene. Reverse transcriptase PCR (RT-PCR) confirmed the expression of this gene in line g5. Histochemical analysis of the enzyme oxalate oxidase confirmed its activity increased in the leaves of line g5. A bioassay for resistance to TLB used zoospores of Phytophthora colocasiae to inoculate tissue-cultured plantlets. Transgenic line g5 showed the complete arrest of this disease; in contrast, the pathogen killed non-transformed plants by 12 days after inoculation. A second bioassay, in which spores of P. colocasiae were inoculated onto disks of leaves of one-year-old potted plants, confirmed that transgenic line g5 had greatly increased resistance to this pathogen. This is the first report to demonstrate that genetic transformation of a crop species with an OxO gene could confer increased resistance to a pathogen (P. colocasiae) that does not secrete oxalic acid (OA).

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MATTHEWS, PETER J., VAN DU NGUYEN, QIONG FANG, and CHUN-LIN LONG. "Colocasia spongifolia sp. nov. (Araceae) in southern China and central Vietnam." Phytotaxa 541, no. 1 (March 22, 2022): 1–9. http://dx.doi.org/10.11646/phytotaxa.541.1.1.

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Colocasia spongifolia sp. nov. (Araceae) is a large herb in forest edges on mountain slopes in southern China and central Vietnam. The plant is remarkable for its distinct vegetative morphology, while floral morphology places it as a close wild relative of C. esculenta (taro), among other closely-related species. The name given here reflects a thick, rubbery, spongy leaf blade unlike the blades in other Colocasia species known to us. The blade has exceptionally large spongy mesophyll cavities that are visible to the naked eye. Vegetative reproduction appears to be limited to direct (though shy) sprouting of lateral buds to form new erect stems, without production of side-tubers or stolons. In contrast to other Colocasia species, dense spreading colonies (clumps or patches) were not seen.

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Mani, U. V., M. Sharma, K. Waghray, U. Iyer, and I. Mani. "Effect of colocasia leaves (Colocasia antiquorum) on serum and tissue lipids in cholesterol-fed rats." Plant Foods for Human Nutrition 39, no. 3 (September 1989): 245–55. http://dx.doi.org/10.1007/bf01091935.

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32

Aragon, Stacie L., Keng-Chang Chuang, and Adelheid R. Kuehnle. "An Effective Method for Co-isolating Nucleic Acids from Horticultural Aroids." HortScience 39, no. 1 (February 2004): 177–80. http://dx.doi.org/10.21273/hortsci.39.1.177.

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Isolation of high quality nucleic acids from aroids can be difficult due to the presence of carbohydrates, phenolics, and other compounds that bind to and/or co-precipitate with the DNA or RNA. Methods previously used for marine algae, mango, and papaya were modified and successfully used for the simultaneous isolation of high quality genomic DNA and RNA from Anthurium, Colocasia, and Spathiphyllum leaves. Genomic DNA yields averaged 477 μg·g-1 fresh weight for Anthurium and 322 and 177 μg·g-1 fresh weight, respectively, for Colocasia and Spathiphyllum. Total RNA yields averaged 129 μg·g-1 fresh weight for Anthurium and 61 and 50 μg·g-1 fresh weight, respectively, for Colocasia Spathiphyllum. This method may be useful in co-isolating high quality nucleic acids from additional aroids and other plants.

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Kushwah, Chandrakanta, Nitu Singh, Raksha Goswami, and Nitesh Jain. "Antipyretic Activity of Hydroalcoholic Extract of Leaves of Colocasia esculenta." Journal of Drug Delivery and Therapeutics 11, no. 1 (January 15, 2021): 65–67. http://dx.doi.org/10.22270/jddt.v11i1.4663.

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In this paper the antipyretic effect of the Hydroalcoholic extract of leaves of Colocasia esculenta against Brewer yeast induced pyrexia model in Wistar rats of either sex was investigated. Colocasia esculenta (Apiaceae) is a tropical perennial plant. It contain flavonoids, alkaloids, apigenin, anthocyanin, carbohydrates, fiber, minerals, protein, fat, calcium and iron, Fever induced in the animal (rats) by the injection 15%w/v of brewer’s yeast suspension (10mg/kg according to body weight of rats) subcutaneously in the back below the nape of the neck. . After 18 hr. of Brewer’s yeast injection and rise in rectal temperature was recorded. The temperature of animal was recorded at 0, 1, 2, 3 and 4hr after drug administration. Paracetamol (100 mg/kg p. o.) was used as standard drug. The group received Hydroalcoholic extract 200mg/kg and 400mg/kg showed significant decrease in rectal temperature respectively as compared with the group received standard drug. All the values are expressed as mean ± standard deviation and analysed for ANOVA. Differences between controls, standard ant test groups were considered significant at P < 0.001 levels. . The Hydroalcoholic extract of Colocasia esculenta leaves (200mg/kg and 400mg/kg) possesses dose dependent, significant antipyretic activity against Brewer yeast induced pyrexia. Keywords: Antipyretic activity, ethanolic extract, Colocasia esculenta, Dunnet’s t –test, ANOVA.

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Yusuf, Muhammad. "Uji Efek Antiangiogenesis Menggunakan Metode Chorio Allantoic Membrane dari Ekstrak Etanol Daun Talas (Colocasia esculenta L. Schott)." Sasambo Journal of Pharmacy 1, no. 2 (September 30, 2020): 51–56. http://dx.doi.org/10.29303/sjp.v1i2.36.

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Antiangiogenesis berdasarkan ekstrak etanol in vivo daun talas ( Colocasia esculenta L. Schott) dengan metode Chorio Allantoic Membrane (CAM). Angiogenesis adalah proses informasi kapiler baru yang terkandung dalam sistem vaskular. Daun talas ( Colocasia esculenta L.Schott) mengandung flavonoid yang diduga memiliki efek antiangiogenesis. Penelitian bertujuan untuk melihat potensi antiangiogenesis ekstrak etanol daun talas ( Colocasia esculenta L. Schott) dengan metode Chorio Allantois Membrane (CAM) dan menentukan konsentrasi ekstrak daun talas ( Colocasia esculenta L. Schott) yang berpotensi sebagai antiangiogenesis. The Antiangiogenesis Chorio Allantoic Membrane(CAM) menggunakan telur ayam berumur 9 hari. Penelitian membagi telur menjadi 4 kelompok, satu kelompok kontrol tanpa perlakuan dan 3 kelompok sebagai kontrol pengobatan. Kelompok kontrol diperlakukan dengan konsentrasi 1 ug / ml, 10 mg / ml dan 100 mg / ml. Telur diinkubasi selama 72 jam. Penelitian dilakukan dengan skor semiquantitatif pengamatan makroskopik. Pada kelompok kontrol yang tidak diberi perlakuan mendapat skor 5 dan kelompok perlakuan pada konsentrasi 1 ug / ml mendapat skor 5, konsentrasi 10 ug / ml mendapat skor 1 dan konsentrasi 100 ug / ml mendapat skor 0. Hasil penelitian menunjukkan bahwa konsentrasi ekstrak yang diberikan Efek antiangiogenesis adalah pada konsentrasi 10 ug / ml dan 100 ug / ml dan konsentrasi ekstrak yang efektif menghambat antiangiogenesis pada konsentrasi 100 ug / ml. Dapat disimpulkan bahwa semakin besar jumlah konsentrasi ekstrak yang dimasukkan,

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NGOC-SÂM, LÝ, WONG SIN YENG, THOMAS HAEVERMANS, NGUYỄN VĂN DƯ, and PETER C. BOYCE. "Vietnamocasia, a new genus from Central Vietnam belonging to the Alocasia-Colocasia clade (Araceae)." Phytotaxa 303, no. 3 (April 13, 2017): 253. http://dx.doi.org/10.11646/phytotaxa.303.3.5.

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Vietnamocasia, a new monotypic aroid genus in the Alocasia-Colocasia clade, is described with the type species, Vietnamocasia dauae. Vietnamocasia is distinguished by possessing free individual staminate flowers, lacking expanded synconnectives, and having nodding inflorescences. Vegetatively Vietnamocasia is reminiscent of species of the distantly closely related Alocasia Cuprea Group, although Vietnamocasia is so far only known from the type locality in Central Vietnam, over 1200 km NE from the nearest representative of the Alocasia Cuprea Group. The phylogenetic analyses of Vietnamocasia dauae together with representative taxa from all genera of the Alocasia-Colocasia clade recovered Vietnamocasia as a strongly supported clade sister to Alocasia, together nested in a clade to which Leucocasia is a sister taxon. Vietnamocasia dauae is illustrated from living plants and with a line drawing. A key to all genera of Alocasia-Colocasia clade is included.

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Tyson, J. L., and R. A. Fullerton. "A leaf disc assay for determining resistance of taro to Phytophthora colocasiae." New Zealand Plant Protection 68 (January 8, 2015): 415–19. http://dx.doi.org/10.30843/nzpp.2015.68.5821.

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Phytophthora colocasiae is a destructive fungal pathogen of taro (Colocasia esculenta) which causes taro leaf blight This disease destroyed Samoas taro export industry and led to local food shortages following introduction of the pathogen in 1993 In support of a Pacific regional taro resistance breeding programme laboratory studies in New Zealand aimed to develop a leaf disc bioassay for identifying taro genotypes with disease tolerance A medium has been developed that will retard senescence of the leaf discs for over 14 days The rate of leaf disc infection and subsequent lesion development varied with incubation temperature leaf age and taro cultivar An understanding of these factors and the variation they cause has resulted in a laboratory leaf disc assay for testing resistance of different taro cultivars to taro leaf blight

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Putra, Rudy Syah, Mutiara Ayu, and Resti Yunia Amri. "Performance Comparison between Biocoagulant Based on Protein and Tannin Compared with Chemical Coagulant." Key Engineering Materials 840 (April 2020): 29–34. http://dx.doi.org/10.4028/www.scientific.net/kem.840.29.

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In this study the performance of biocoagulant based on protein (Moringa oleifera, Vigna sinensi) and tannin (Colocasie esculenta) was compared with Poly Alumunium Chloride (PAC) as a chemical coagulant have been evaluated using a synthetic kaolinite-turbid water which referred to water sample. The effectiveness of biocoagulants dosage were evaluated by turbidity removal (%), total dissolved solid TDS and electrical conductivity (EC). The results showed that the turbidity removal of water sample achieved as much as 94.4% and 87.0% for Moringa oleifera and Vigna sinensi, but low turbidity removal occurred when using Colocasia esculenta as much as 26.4%. High results of turbidity removal showed when using PAC as coagulant at different dosages as a comparison. The decreasing of TDS and EC in the water sample did not much influenced by the coagulants except for Vigna sinensi.

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Vieira, Gustavo, Guilherme Peterle, Jéssica Loss, Gabriel Peterle, Carlos Poloni, João Colombo, and Paola Monaco. "Strategies for Taro (Colocasia esculenta) Irrigation." Journal of Experimental Agriculture International 24, no. 1 (June 20, 2018): 1–9. http://dx.doi.org/10.9734/jeai/2018/41516.

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Prajapati, Rakesh, Manisha Kalariya, Rahul Umbarkar, Sachin Parmar, and Navin Sheth. "Colocasia esculenta: A potent indigenous plant." International journal of Nutrition, Pharmacology, Neurological Diseases 1, no. 2 (2011): 90. http://dx.doi.org/10.4103/2231-0738.84188.

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Thorpe, Daniel J., Thomas C. Harrington, and Janice Y. Uchida. "Pathogenicity, Internal Transcribed Spacer-rDNA Variation, and Human Dispersal of Ceratocystis fimbriata on the Family Araceae." Phytopathology® 95, no. 3 (March 2005): 316–23. http://dx.doi.org/10.1094/phyto-95-0316.

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Ceratocystis fimbriata is a complex of many cryptic, host-specialized species that causes wilt and canker of woody species and rot diseases of storage roots and corms of many economically important plants worldwide. With the exception of the family Araceae, all confirmed hosts of C. fimbriata are dicotyledonous plants. We hypothesized that the isolates from members of the family Araceae would form a monophyletic lineage specialized to infect these unique hosts. Analyses of sequences of the internal transcribed spacer (ITS) region of nuclear rDNA indicate that isolates and herbarium specimens of C. fimbriata from the family Araceae represent three different groups: an Xanthosoma/Syngonium group on corms of Xanthosoma spp. from the Caribbean region and on ornamental S. podophyllum from greenhouses in Florida, Hawaii, Australia, and Brazil; an inhame group on corms of Colocasia esculenta in Brazil; and a distantly related taro group on Colocasia esculenta in Hawaii and China and on X. sagittifolium in Fiji. Inoculations of three species of Araceae (Caladium bicolor, S. podophyllum, and Colocasia esculenta) showed that isolates from all three groups are pathogenic to these three hosts. Brazilian isolates from Mangifera indica and Ficus carica were only weakly pathogenic to Caladium and Syngonium sp. and were not pathogenic to Colocasia sp. Syngonium plants appeared to be most susceptible to isolates of the Xanthosoma/Syngonium group, and Colocasia plants were least susceptible to isolates from Syngonium spp. Thus, it appears that adaptations to the family Araceae have evolved more than once in the C. fimbriata complex. It is hypothesized that the three groups of C. fimbriata on the family Araceae are native to the Caribbean, Brazil, and Asia, respectively, but they have been spread elsewhere by humans.

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AROGUNDADE, Oluwabunmi O., and Olubukola ADEDEJI. "The importance of nutritive parameters in the taxonomy of some corm-producing members of the family Araceae." Notulae Scientia Biologicae 12, no. 2 (June 29, 2020): 318–33. http://dx.doi.org/10.15835/nsb12210537.

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This work gives detailed information of the proximate, phytochemical, Vitamin C and mineral constituents of the leaves and corms of members of family Araceae from genera Alocasia, Colocasia and Xanthosoma with the aim of promoting the use of these genera as food and solving some taxonomic problems. X-Ray Fluorescence was employed in determining the mineral constituents while other parameters were determined following standard methods. The result revealed high carbohydrate and moisture contents in all the taxa. The highest saponin and tannin contents were encountered in the leaves and corms of Xanthosoma saggitifolium. The leaves of the Xanthosoma taxa are rich in Vitamin C. Bulk, essential and non-essential elements were detected in all the taxa. They all had high potassium and calcium contents in their leaves and corms except in Colocasia esculentum var. esculentum where potassium was not detected in the leaves. Chromium was not detected in the leaves of Xanthosoma saggitifolium. Arsenic, Bromine and Rubidium were not detected in the leaves of Alocasia macrorrhiza, Alocasia plumbea, Xanthosoma mafaffa (Red) and Xanthosoma saggitifolium. Titanium was not detected in the leaves of the Colocasia and Xanthosoma varieties and the corms of Alocasia cucullata, Alocasia plumbea, Colocasia esculentum var. esculentum, Xanthosoma mafaffa (Red) and Xanthosoma saggitifolium. The use of nutritive parameters and phytochemicals in the taxonomy of the Araceae taxa was discussed.

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Rio Eka Desi Purwandari Hartanti, Sulmin Gumiri, and Siti Sunariyati. "Keanekaragaman dan Karakteristik Habitat Tumbuhan Famili Araceae di Wilayah Kecamatan Jekan Raya Kota Palangka Raya." Journal of Environment and Management 1, no. 3 (October 1, 2020): 221–31. http://dx.doi.org/10.37304/jem.v1i3.2568.

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This study aims to determine the type, level of diversity, and habitat characteristics of the Araceae family that grows in the Jekan Raya District of Palangka Raya City. The purposive sampling method was used to study the Araceae spread over four villages, namely Menteng, Palangka, Bukit Tunggal, and Petuk Ketimpun. The data were collected by observ-ing the morphological part of the sample plants and then were analyzed descriptively. Diversity analysis was carried out using the Shannon-Wiener Diversity index. Diversity analysis of the plants was determined based on the Shannon-Wiener Diversity index. The results show that there have been sixteen (16) types of Araceae plants that grow in the Jekan Raya sub-district of Palangka Raya City, namely: Xanthosoma sagittifolium, Caladium polkagreen, Alocasia plum-bea, Caladium redflash, Colocasia esculenta, Aglaonema costatum, Homalomena rubescens, Caladium polkagreen, Alocasia plumbea, Caladium redflash, Colocasia esculenta, Aglaonema costatum, Homalomena rubescens, Caladium polkagreen, Alocasia plumbea, Caladium redflash, Colocasia esculenta, Aglaonema costatum, Homalomena rubescens, Caladium polkagreen, Alocasia plumbea, Caladium redflash, Colocasia esculenta, Aglaonema costatum, Homalomena rubescens Caladium pinkburst, Spathiphyllum floribundum, Caladium rosebud, Aglaonema legacy, Caladium redstar, Caladium redbelly, and Caladium hortulanum. The characteristics of the habitat are divided into two types, namely the texture of the soil is loamy, slightly sandy and blackish and the habitat is the texture of peat and blackish.

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Imran, Ainun, Hasyimuddin Hasyimuddin, and Nurindah Nurindah. "Identifikasi jenis tumbuhan talas di Hutan Topidi, Kecamatan Tinggimoncong, Kabupaten Gowa, Sulawesi Selatan." Filogeni: Jurnal Mahasiswa Biologi 2, no. 2 (August 30, 2022): 59–63. http://dx.doi.org/10.24252/filogeni.v2i2.29470.

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Tumbuhan talas merupakan tumbuhan tingkat tinggi atau tumbuhan tegak yang dapat dibedakan dengan jelas antara daun,batang dan akar. Kegiatan identifikasi morfologi diperlukan untuk melihat keragaman jenis tumbuhan talas. Tujuan penelitian ini adalah untuk mengetahui keragaman tumbuhan talas berdasarkan karakter morfologi daun. Penelitian ini adalah penelitian deskriptif dengan menggunakan metode jelajah. Hasil yang ditemukan dari penelitian ini adalah ditemukan 4 jenis tumbuhan talas yang terdiri dari dua genus yaitu Alocasia dan Colocasia. Tumbuhan talas yang ditemukan antara lain, Alocasia macrorrhizos, Colocasia esculenta, Alocasia longiloba dan Alocasia brisbanensis

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R, Jyothi, and Srinivasa Murthy K. M. "Assessment of Antioxidants, Phytoactives in Extracts of Colocasia esculenta." International Journal of Trend in Scientific Research and Development Volume-2, Issue-4 (June 30, 2018): 2887–93. http://dx.doi.org/10.31142/ijtsrd15731.

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Sjamsudin, Endang, Annisya Muharty, Lucky Riawan, and Bambang Pontjo Priosoeryanto. "The efficacy taro leaf extract on wound healing contaminated with Staphylococcus aureus bacteria." Padjadjaran Journal of Dentistry 33, no. 3 (December 1, 2021): 199. http://dx.doi.org/10.24198/pjd.vol33no3.21325.

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Introduction: taro leaves (Colocasia esculenta (L.) Schott) have been reported to possess wound healing, anti-inflammatory, antibacterial and antioxidant activities. One of the factors that affect wound healing is infection in the wound, wherein the wound is infected by bacteria, especially Staphylococcus aureus that is mostly found in the oral cavity, the wound healing process will be hampered and become longer healed.The objective of this research was to analyze the efficacy of Colocasia esculenta (L.) Schott extract on the healing process of wounds contaminated with Staphylococcus aureus. Methods: This experimental study on Sprague dawley rats was carried out at the Teaching Veterinary Hospital, IPB . Twenty-four Sprague dawley rats were made with circular excision wounds with a diameter of 2 cm on the dorsum, and Staphylococcus aureus specimens were contaminated with a dose of 3.4x108 LAC. Rats were randomly divided into 2 groups. Group I was given a placebo, group II was given a 25% concentration of Colocasia esculenta (L.) Schott extract on the wound once a day. Four rats from each group were euthanized on days 3, 7, and 14. The number of neutrophils, macrophages, re-epithelialization and FGF-2 expression were measured by microscopic observation with visual field control, and comparative data were analyzed using the Mann-Whitney statistical test. Results: The number of neutrophils on day 7 of the Colocasia esculenta (L.) Schott leaf extract group was less than the control group (p=0.040). The number of macrophages on the 3rd day was more in the treatment group than the control group (p=0.032), and on the 14th day, the treatment group was less than the control group (p=0.040). Epithelial cells on the 14th day of the treatment group were more than the control group (p=.0.017). The level of FGF-2 expression on day 7 of the treatment group was higher than the control group (p=0.044). Conclusion: Application of extracts Colocasia esculenta (L.) Schott leaf is proven to be efficacious on day 7 for wound healing contaminated with Staphylococcus aureus bacteria.

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Harrington, Thomas C., Daniel J. Thorpe, Vera Lucia A. Marinho, and Edson L. Furtado. "First report of black rot of Colocasia esculenta caused by Ceratocystis fimbriata in Brazil." Fitopatologia Brasileira 30, no. 1 (February 2005): 88–89. http://dx.doi.org/10.1590/s0100-41582005000100017.

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Ceratocystis fimbriata was found sporulating in gray to black discolored areas on edible corms of Colocasia esculenta found in supermarkets in the states of São Paulo, Rio de Janeiro, Bahia, Rondônia and the Distrito Federal. In most cases the corms were grown in the state of São Paulo. The black rot appeared to occur post-harvest. Sequences of rDNA indicated that the Colocasia sp. isolates belong to the Latin American clade of the C. fimbriata complex, but the isolates were more aggressive than isolates from Ficus carica and Mangifera indica, in pseudopetioles of C. esculenta.

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Okocha, C. N., and D. N. Onunkwo. "Influence of various feeding regimes on the performance of Archachatina marginata snail." Nigerian Journal of Animal Production 45, no. 2 (December 25, 2020): 209–14. http://dx.doi.org/10.51791/njap.v45i2.479.

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This study was to evaluate the growth response of Archachatina marginata as influenced by four natural diets: Pawpaw (Carica papaya) cocoyam (Colocasia esculenta), cocoyam (Xanthosoma sagittifolium), and cassava (Manihot esculenta) leaves and growers mash (a compounded ration). One hundred and twenty (120) grower snails (Archachatina marginata) were purchased from a farm in Ibadan, Oyo State. Data were collected on the growth parameters (weight, length and circumference of shell of the snails arranged in a Completely Randomized Design and replicated three (3) times. The results showed that pawpaw (Carica papaya) recorded the highest mean in all the parameters measured and throughout the duration of the experiment. Cocoyam (Colocasia esculenta) leaf had a better mean than the Cassava (Manihot esculenta) leaves in terms of weight gained whereas the reverse is the case in terms of length and circumference of shell. Pawpaw (Carica papaya) is therefore, recommended to both local and small scale farmers in Abia State and in Nigeria for feeding their snails and cocoyam (Colocasia esculenta) leaves and growers mash as an alternate feed.

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Nurliani, Leni, Sophia Dwiratna, and Boy Macklin Pareira Prawiranegara. "Analisis Penjadwalan Irigasi pada Budidaya Tanaman Talas Pratama (Colocasia esculenta (L). Schott var. Pratama) Menggunakan CROPWAT 8.0." Jurnal Teknotan 13, no. 2 (December 31, 2019): 47. http://dx.doi.org/10.24198/jt.vol13n2.3.

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Tanaman Talas (Colocasia esculenta (L). Schott ) merupakan salah satu bahan pangan lokal yang dapat digunakan sebagai penunjang swasembada pangan nasional. Salah satu cara untuk menunjang pertumbuhan dan perkembangan yang baik dilakukan kajian analisis penjadwalan irigasi yang tepat. Penelitian ini dilakukan untuk mengkaji penjadwalan irigasi pada budidaya Talas Pratama (Colocasia esculenta (L). Schott var. Pratama) di lahan penelitian menggunakan aplikasi Cropwat 8.0 untuk mengoptimalkan ketersediaan air. Metode yang digunakan dalam penelitian ini adalah deskriptif analisis yaitu dengan mengumpulkan data-data yang dibutuhkan serta menganalisis dan menggambarkan besarnya kebutuhan air dan interval pemberian air irigasi dengan menggunakan Software Cropwat 8.0 yang dikembangkan oleh FAO. Interval waktu yang digunakan yaitu berdasarkan setiap tahap pertumbuhan talas dengan jumlah air yang diberikan hingga memenuhi kapasitas lapang pada lahan penelitian. Hasil penelitian ini menunjukan bahwa jumlah kebutuhan air tanaman Talas Pratama (Colocasia esculenta (L). Schott var. Pratama) berdasarkan Cropwat 8.0 yaitu sebesar 1093.9 mm sedangkan kebutuhan air irihasi untuk interval 3 hari, dan 1.853.400 liter untuk interval 4 hari adalah 1.605.150 liter pada lahan seluas 1500 m2.

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Adelberg, Jeffrey, and Joe Toler. "Comparison of Agar and an Agitated, Thin-film, Liquid System for Micropropagation of Ornamental Elephant Ears." HortScience 39, no. 5 (August 2004): 1088–92. http://dx.doi.org/10.21273/hortsci.39.5.1088.

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Micropropagation of black-stemmed elephant ear (C. esculenta (L.) Schott `Fontanesii')' and upright elephant ear (A. macrorrhizos G. Don) were compared in semi-solid agar media and agitated, liquid thin-film bioreactor vessels at four explant densities (33, 100, 165, and 330 explants/L of media) using two growth regulator combinations: 1) 1 μm benzylaminopurine (BA)—growth medium, and 2) 3 μm BA plus 3 μm ancymidol—multiplication medium. The thin-film liquid system outperformed agar culture for most measured responses. Some exceptions were relative dry weights at higher explant densities and multiplication rate of Colocasia. When the thin-film liquid system was compared to agar culture, Alocasia explants produced their greatest biomass and had the least residual sugar at the highest explant density. Alocasia explants multiplied most rapidly and had the greatest relative dry weight on liquid media at the low explant densities. Alocasia plants were larger in growth medium than multiplication medium and larger in liquid medium than agar medium. When compared to agar, Colocasia in the thin-film liquid system produced the greatest biomass at the highest explant density in growth medium, had the greatest relative dry weight at the lowest explant density, and used the most sugar at the highest explant density. Alocasia and Colocasia would likely produce greater fresh and dry weight at the highest explant density if additional sugar were supplied during thin-film culture. Greater growth in thin-film culture of Alocasia and Colocasia is due in part, to greater availability of sugar in liquid compared to agar medium.

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Thamseer, M. K. Mohammad. "Colocasia: A lucrative rotation crop in Karnataka." Indian Journal of Economics and Development 9 (February 24, 2021): 1–4. http://dx.doi.org/10.17485/ijed/v9.28.

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Journal articles on the topic 'Colocasia'

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