Journal articles: 'Drosera'

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Crowder, A. A., M. C. Pearson, P. J. Grubb, and P. H. Langlois. "Drosera L." Journal of Ecology 78, no. 1 (March 1990): 233. http://dx.doi.org/10.2307/2261048.

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Fleischmann, Andreas S., Nivo H. Rakotoarivelo, Aymeric Roccia, Paulo M. Gonella, Lala Roger Andriamiarisoa, Aina Razanatsima, and Fortunat Rakotoarivony. "A new and endemic species of Drosera (Droseraceae) from Madagascar." Plant Ecology and Evolution 153, no. 2 (July 8, 2020): 283–91. http://dx.doi.org/10.5091/plecevo.2020.1705.

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Background and aims – This study is part of an ongoing revision of the world Drosera species. During herbarium revisions of Drosera from Madagascar, a new species was identified and is here described.Methods – The species’ morphology is described based on herbarium studies and observation of living plants in situ, and ecological notes from field observations are provided. The species is compared and contextualized within the current subgeneric classification of Drosera.Key results – The new species, Drosera arachnoides, is recognized as most closely related to another Malagasy-endemic, D. humbertii, from which it is morphologically and ecologically distinct. The new species is placed within D. subg. Drosera sect. Ptycnostigma. Based on the restricted occurrence, the species is assessed as Vulnerable, following IUCN categories and criteria. A key to the Drosera species from Madagascar is provided.Conclusion – Drosera arachnoides is the second endemic Drosera species in Madagascar and raises the total number of species on the island to six.

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Konishchuk, V. V., and O. I. Skakalska. "Drosera in Ukraine: Ecological, сhorological specifics and phytosozonomical characteristics." Biosystems Diversity 27, no. 1 (February 9, 2019): 3–15. http://dx.doi.org/10.15421/011901.

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The paper presents a chorologically systematized description of all taxa of the Drosera L. genus in Ukraine. We performed an analysis of environmental conditions, phytocoenotic characteristics and found new locations of sundew. We generalized the morphometric parameters and proposed a concept – “leaf roundness index”; and recommended including Drosera rotundifolia, Drosera x obovata in the next edition of the Red Data Book of Ukraine due to the contraction of their habitat and their high degree of vulnerability to unfavourable environmental factors and anthropogenic impact; we reccommend growing Drosera ex-situ on the example of Kremenets Botanical Garden with further repatriation in-situ; proved the efficiency of the proposed methods of farming cultivation. The paper substantiates the complex of phytosozological criteria, measures for protection and reproduction of the endangered species of Drosera genus. We suggested a hypothesis about the independence of the taxon of Drosera x obovata. Despite the fact that Drosera longifolia x D. rotundifolia is generally considered to be sterile hybrid, individuals breed vegetatively, are fertile and retain germinability after germination, and have a clearly specific ecotype, sometimes loci are isolated from parent species. To isolate the Drosera x obovata as a single taxon, additional phylogenetic studies are needed, but as a rare, disappearing taxon it needs protection and background monitoring of populations. The area of greatest phytosozological value for sundews in Ukraine is Western Polissia (Volyn, Rivne regions) (D. longifolia – 31, 20 sites, D. intermedia – 31 and 30 respectively). Drosera longifolia is on average distributed slightly further south in Ukraine than D. intermedia, although both taxa are confined to the humid, boreal zone. D. rotundifolia is most widespread in the humid zone (Polissia, the Carpathians). Despite the presence of Drosera x obovata in the Cheremskyi, Rivnenskyi Nature Reserve, Shatskyi National Nature Park, and several landscape reserves, the taxon is continuing to disappear due to succession, afforestation, water regime change etc.

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Quach, Phuong Ngo Diem, Minh Thi Thanh Hoang, Thu Thi Hoang, and Le Van Bui. "CALLUS AND CELL SUSPENSION CULTURE OF DROSERA BURMANNI VAHL FOR QUINONE PRODUCTION." Science and Technology Development Journal 13, no. 2 (June 30, 2010): 53–61. http://dx.doi.org/10.32508/stdj.v13i2.2126.

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Drosera burmanni Vahl, one of three Drosera species in Vietnam, has been successfully cultured in vitro. Our previous researchs have shown that extracts of Drosera burmanni Vahl contain bioactive compounds such as naphthoquinone, anthraquinone. To obtain cell biomass as well as increase secondary metabolites, callus and cell suspension culture of Drosera burmanni Vahl become extremely urgent. Therefore, in this study, we focused on building Drosera burmanni Vahl callus and suspension culture process to obtain quinone. Our results show that the most optimized medium for callus culture is Gamborg’s B5, saccharose 20g/l, casein 100 mg/l, PVP 1g/l. To induce callus culture, the best hormone’s concentration is 2,4-D 0,2 mg/l, NAA 0,2 mg/l. Growing callus and increasing cell biomass in suspension culture are the same culture type. The peak of growing phase is on 12th. HPLC analysis showed present of plumbagin, one of quinone bioactive compounds determined in Drosera species, on cultured cell suspension.

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Murza, Gillian L., and Arthur R. Davis. "Comparative flower structure of three species of sundew (Drosera anglica, Drosera linearis, and Drosera rotundifolia) in relation to breeding system." Canadian Journal of Botany 81, no. 11 (November 1, 2003): 1129–42. http://dx.doi.org/10.1139/b03-104.

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Whereas much attention has been given to the fascinating prey-trapping leaves of carnivorous plants, less research has been conducted on their flower structure and breeding systems. Accordingly, a comparative study of the floral morphology and anatomy of the three species of sundews (Droseraceae: Drosera anglica Huds., Drosera linearis Goldie, and Drosera rotundifolia L.) in Saskatchewan was performed to ascertain the presence of floral rewards for potential pollinators and to obtain pollen to ovule ratios, an indicator of breeding system. Utilizing light and scanning electron microscopy, differences between the three species were apparent in length of styles, number of placentas, anther and pollen colour, and structure of glandular trichomes on sepals. The occurrence of features unique to each species does not support the concept of D. anglica as a hybrid of the other two species. Flowers of all three species lack nectaries, although clusters of papillate cells that were reminiscent of secretory tissue were observed at the apices of anthers and at the summits of ovaries. Pollen to ovule ratios were low for all species, ranging from 9.0 to 18.7 in D. rotundifolia and D. linearis, respectively, suggesting an autogamous breeding system for each species.Key words: Drosera anglica, Drosera linearis, Drosera rotundifolia, Droseraceae, comparative flower structure, pollen to ovule ratios, breeding system.

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Hayakawa, Hiroshi, Hidenori Hamachi, Kohei Ogawa, Yukio Minaniya, Jun Yokoyama, Ryo Arakawa, and Tatsuya Fukuda. "New records of Drosera tokaiensis subsp. hyugaensis (Droseraceae) from Kochi Prefecture, Japan." Botany 90, no. 8 (August 2012): 763–69. http://dx.doi.org/10.1139/b2012-036.

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Drosera tokaiensis subsp. hyugaensis (3x), a hybrid between Drosera spatulata (4x) and Drosera rotundifolia (2x), was found in Kochi Prefecture, Japan. Results of PCR–RFLP analysis of the internal transcribed spacer (ITS) regions of nuclear DNA showed that the hybrid individuals had the combined patterns of both parental species. Moreover, the chloroplast DNA of all hybrid individuals was identical to that of D. spatulata, suggesting that the hybrids were generated as a result of the transfer of pollen grains from D. rotundifolia to D. spatulata. Drosera tokaiensis subsp. hyugaensis was reported from Miyazaki and Kochi prefectures only. Drosera tokaiensis subsp. tokaiensis (6x), which is an allopolyploid species of D. tokaiensis subsp. hyugaensis, grows mainly in the Tokai and Kinki districts and is not distributed with D. tokaiensis subsp. hyugaensis in Miyazaki and Kochi prefectures. These findings indicate that the hybridization between D. spatulata and D. rotundifolia occurred independently and repeatedly in various areas of Japan.

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Jones, James M. C., Hugues B. Massicotte, and Arthur L. Fredeen. "Calcium and pH co-restrict abundance of Drosera rotundifolia (Droseraceae) in a Sphagnum bog in central British Columbia." Botany 94, no. 2 (February 2016): 139–46. http://dx.doi.org/10.1139/cjb-2015-0136.

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The genus Drosera (sundews) is represented in British Columbia (BC), Canada, by Drosera rotundifolia (L.), Drosera anglica (Huds.), and their hybrid Drosera × obovata (Mert. & W.D.J. Koch). All three can be found in Sphagnum bogs of central BC, including those within the Aleza Lake Research Forest (ALRF) located 60 km east of Prince George. Vegetation patterns in bogs are known to be correlated with light, water, and nutrient gradients, and despite information being available on the influence of light and water on Drosera occurrence, little information is known about the role of nutrients. Here, we focused on a bog containing all three Drosera species, to determine whether nutrient levels are related to the abundance of the widespread species, D. rotundifolia. Univariate regression tree analysis between soil water chemistry and D. rotundifolia numbers indicates that D. rotundifolia is a calcifuge, preferring moderately acidic soil pH (>5.5) and relatively low calcium levels (<2.88 ppm). This study provides evidence that high soil water calcium and low pH limit the growth of D. rotundifolia in field populations. The physiology underlying this preference, how this is affected by hybridization between other sundew species, and how this mineralogical limitation interacts with other niche-defining factors to dictate the occurrence of D. rotundifolia are questions that remain to be answered.

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Grima, Peter P. "The Natural Hybrid between Drosera intermedia and Drosera rotundifolia in Massachusetts." Rhodora 122, no. 989 (May 21, 2020): 23. http://dx.doi.org/10.3119/20-08.

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Rusmin, Rusmin, and Ramadanil Pitopang. "KAJIAN MORFOLOGI Drosera burmanni Vahl. DARI DESA MAHOLO, KECAMATAN LORE TIMUR, KABUPATEN POSO, SULAWESI TENGAH." Biocelebes 14, no. 2 (September 1, 2020): 162–67. http://dx.doi.org/10.22487/bioceb.v14i2.15268.

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The research entitled Morphological Studies of Drosera burmanni Vahl. From Maholo Village, Lore Timur District, Poso Regency Cental Sulawesi has been conducted from March to April 2017. The objective of research was to described the morphology character of Drosera which was found in studied area. The research was used botanical exploration in the studied area the morphological character was described followed Van Steenis (1953). The result showed the there were 820 individuals of Drosera burmanni Vahl. the description is provided in this paper.

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ROBINSON, ALASTAIR S., ADAM T. CROSS, MANFRED E. MEISTERL, and ANDREAS FLEISCHMANN. "A new pygmy sundew, Drosera albonotata (Droseraceae), from the western Wheatbelt and an updated diagnostic key to the orange-flowered pygmy Drosera of Western Australia." Phytotaxa 346, no. 3 (April 6, 2018): 221. http://dx.doi.org/10.11646/phytotaxa.346.3.2.

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A new species of Drosera—Drosera albonotata—from the western Wheatbelt (Western Australia) is described and illustrated. The taxon, which is largely restricted to sandy clay loam soils in Wandoo woodland and shrubland, is morphologically similar to D. miniata and D. coomallo but can be distinguished by its distinct floral features and ecology. A distribution map of the new species and its allies and a revised and updated diagnostic key to the twelve recognised orange-flowered pygmy Drosera in Western Australia are provided.

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MICLEA, Ileana, and Marius ZĂHAN. "Propagation of Drosera rotundifolia and Drosera capensis in an in vitro Culture System." Bulletin of University of Agricultural Sciences and Veterinary Medicine Cluj-Napoca. Animal Science and Biotechnologies 74, no. 2 (November 26, 2017): 144. http://dx.doi.org/10.15835/buasvmcn-asb:0018.

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Drosera rotundifolia and Drosera capensis (Droseraceae) are carnivorous plants grown as ornamentals and sources for homeopathic medicine. The aim of this study was to optimize nutrient and growth regulator concentrations for the in vitro propagation of these species. Half strength MS medium (1/2MS) was supplemented with kinetin (0.5, 2, 5 mg/l) or 6-benzyladenine (3, 5 mg/l) and plantlets were transferred to 1/2MS with or without cytokinins. After 8 weeks rosette diameter, plant height, number of roots, root length were recorded and plants were cultured in full strength MS, 1/2MS or 1/2MS with 0.5 mg/l α-naphthaleneacetic acid for the same period of time. Afterwards, plant characteristics (number of roots, root length, number of shoots, number of flower stalks) were assessed. For D. rotundifolia, shoot development and rosette diameter increased significantly in the medium with 0.5 mg/l kinetin and 3 mg/l 6-benzyladenine, while root development decreased. Plant growth regulator free medium was more suitable for root development than medium with α-naphthaleneacetic acid and thus supported the formation of significantly more flower stalks. For D. capensis, kinetin was detrimental for shoot development, the optimum medium for both shoot and root formation being MS without plant growth regulators.

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Hoyo, Yuri, and Shiro Tsuyuzaki. "Sexual and vegetative reproduction of the sympatric congeners Drosera anglica and Drosera rotundifolia." Flora - Morphology, Distribution, Functional Ecology of Plants 210 (January 2015): 60–65. http://dx.doi.org/10.1016/j.flora.2014.10.003.

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13

Cheek, Martin. "NOTES ON HYBRIDS IN DROSERA." Curtis's Botanical Magazine 10, no. 3 (August 1993): 138–44. http://dx.doi.org/10.1111/j.1467-8748.1993.tb00034.x.

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Miranda, Vitor Fernandes Oliveira de, Vanderlei Geraldo Martins, Antonio Furlan, and Maurício Bacci Jr. "Plant or fungal sequences? An alternative optimized PCR protocol to avoid ITS (nrDNA) misamplification." Brazilian Archives of Biology and Technology 53, no. 1 (February 2010): 141–52. http://dx.doi.org/10.1590/s1516-89132010000100018.

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The nuclear ribosomal DNA internal transcribed spacers (ITS1 and ITS2) from leaves of Drosera (Droseraceae) were amplified using "universal" primers. The analysis of the products demonstrated most samples were a molecular mixture as a result of unsuccessful and non-specific amplifications. Among the obtained sequences, two were from Basidiomycota fungi. Homologous sequences of Basidiomycota were obtained from GenBank database and added to a data set with sequences from Drosera leaves. Parsimony analysis demonstrated that one sequence was amplified from an Ustilaginomycetes fungus, and another from a Heterobasidiomycetes. Possibly these fungi were associated to leaves of Drosera, and not because of samples contamination. In order to provide optimization and a better specificity of PCR (polymerase chain reaction), a very successful method was demonstrated using dimethyl sulfoxide (DMSO) and bovine serum albumin (BSA) in reactions.

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Fukushima, Kenji, Kanji Nagai, Yoshikazu Hoshi, Saeko Masumoto, Ichiho Mikami, Yumiko Takahashi, Hideaki Oike, and Masuko Kobori. "Drosera rotundifolia and Drosera tokaiensis suppress the activation of HMC-1 human mast cells." Journal of Ethnopharmacology 125, no. 1 (August 2009): 90–96. http://dx.doi.org/10.1016/j.jep.2009.06.009.

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Biswal, Devendra Kumar, Sureni Yanthan, Ruchishree Konhar, Manish Debnath, Suman Kumaria, and Pramod Tandon. "Phylogeny and biogeography of the carnivorous plant family Droseraceae with representative Drosera species from Northeast India." F1000Research 6 (August 14, 2017): 1454. http://dx.doi.org/10.12688/f1000research.12049.1.

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Background: Botanical carnivory is spread across four major angiosperm lineages and five orders: Poales, Caryophyllales, Oxalidales, Ericales and Lamiales. The carnivorous plant family Droseraceae is well known for its wide range of representatives in the temperate zone. Taxonomically, it is regarded as one of the most problematic and unresolved carnivorous plant families. In the present study, the phylogenetic position and biogeographic analysis of the genus Drosera is revisited by taking two species from the genus Drosera (D. burmanii and D. Peltata) found in Meghalaya (Northeast India). Methods: The purposes of this study were to investigate the monophyly, reconstruct phylogenetic relationships and ancestral area of the genus Drosera, and to infer its origin and dispersal using molecular markers from the whole ITS (18S, 28S, ITS1, ITS2) region and ribulose bisphosphate carboxylase (rbcL) sequences. Results: The present study recovered most of the findings by previous studies. The basal position of Droseraceae within the non-carnivorous Caryophyllales indicated in the tree topologies and fossil findings strongly support a date of origin for Droseraceae during the Paleocene (55-65 mya). Within the family Droseraceae, the sister relationship between Aldrovanda and Dionaea is supported by our ITS and rbcL dataset. This information can be used for further comparative and experimental studies. Conclusions: Drosera species are best suited as model systems for addressing a wide array of questions concerning evolutionary dynamics and ecological processes governing botanical carnivory.

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Caniato, R., R. Filippini, and E. M. Cappelletti. "Naphthoquinone Contents of Cultivated Drosera Species Drosera binata, D. binata var. dichotoma, and D. capensis." International Journal of Crude Drug Research 27, no. 3 (January 1989): 129–36. http://dx.doi.org/10.3109/13880208909053952.

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Fleischmann, A., R. Gibson, and F. Rivadavia. "DROSERACEAE." Bothalia 38, no. 1 (August 14, 2008): 141–44. http://dx.doi.org/10.4102/abc.v38i1.279.

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Tulasi, Chidepudi D. S. L. N. "PHYTOCHEMICAL SCREENING AND EVALUATION OF IN-VITRO ANTIMICROBIAL ACTIVITY OF DROSERA SPATULATA VAR BAKOENSIS- AN INDIGENOUS CARNIVOROUS PLANT AGAINST RESPIRATORY TRACT INFECTIOUS MICROBES." Asian Journal of Pharmaceutical and Clinical Research 9, no. 6 (November 1, 2016): 274. http://dx.doi.org/10.22159/ajpcr.2016.v9i6.14382.

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Objective: In the present study, the phytochemical constituents of Drosera spatulata, have been evaluated and antimicrobial activity was screened against respiratory tract infectious microbes.Methods: The phytochemicals present in Drosera spatulata by qualitative phytochemical assays and the antimicrobial activity along with MIC, MBC and BIC were determined against S. aureus, Klebsiella pneumonia and S.Pneumonia the causative organisms of pulmonary infections, mainly effects the nasal pharynx, trachea, and lungs as well as Aspergillus niger.Results: Aqueous, ethanol, methanol extracts of thick roots, open flower and hair of Drosera spatulata var bakoensis against this pathogenic bacteria and fungi showed high zone of inhibition which estimated by disc-diffusion method as well as minimum inhibition concentration manifestation by the broth microdilution assay followed MBC and BIC. The values of MIC, MBC and BIC obtained were between 0.3-0.9, 0.36-2.25, 0.12 - 0.37 mg/mL. The results revealed that the plant extracts of Drosera spatulata var bakoensis have high potential even at low concentrations values against bacteria and fungi cultures and this results validated by the presence of high amounts of alkaloids, quinones, anthraquinones, flavonoids in the plant extracts. Conclusion: In the present study, the results showed the presence of high amounts of alkaloids, flavonoids, quninoes, anthraquinones, terpinoids in Drasera spatulata plant. In the antibacterial and antifungal activity, the ethanol and methanol extracts significantly showed the activity against the tested respiratory disease causing bacteria and antifungal properties with zone of inhibition showed more than aqueous extracts at very low concentrations

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Skakal’s’ka, Оlga, Vasul’ Konischuk, Andrii Sasiuk, Oleksii Bilovskyy, and Oleksandr Mnyuh. "Знахідка Drosera rotundifolia L. біля озера Святого (Хмельницька область)." Lesya Ukrainka Eastern European National University Scientific Bulletin. Series: Biological Sciences, no. 12 (November 5, 2018): 49–54. http://dx.doi.org/10.29038/2617-4723-2015-313-49-54.

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У статті повідомляється про знахідку Drosera rotundifolia L. у межах заболочених берегів території гідрологічної пам’ятки природи загальнодержавного значення – озера Святе, що увійшла в НПП «Мале Полісся» Хмельницької області. Наведено результати геоботанічних, фітоценотичних досліджень, екології місцезростання виду. Рослинність представлено формаціями Sphagneta magellanicum, Sphagnetа cuspidatum, які утворюють асоціації Sphagnum magellanicum + Carex rostrata + Sphagnum cuspidatum + Ledum palustre + Calla palustris + Drosera rotundifolia. Висвітлено дані про чисельність особин у ценопопуляції на моніторинговій території. Отримані дані засвідчують сприятливі умови для подальшого розвитку та самопідтримання популяцій у ценозі. Також виявлено зростання Scheuchzerіa palustris L., яка занесена до Червоної книги України.

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KRUEGER, THILO, and ANDREAS FLEISCHMANN. "A new species of Drosera section Arachnopus (Droseraceae) from the western Kimberley, Australia, and amendments to the range and circumscription of Drosera finlaysoniana." Phytotaxa 501, no. 1 (May 19, 2021): 56–84. http://dx.doi.org/10.11646/phytotaxa.501.1.2.

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A new annual species of Drosera section Arachnopus, Drosera margaritacea, from the western Kimberley region (Western Australia) is described and illustrated, including detailed comparisons with the morphologically most similar species, D. finlaysoniana. The latter name is lectotypified here. The global range of D. finlaysoniana is provided, including a doubtful first record for Thailand, while the species, in contrast with statements made in some published references, does not occur in India, Laos, Cambodia and the Philippines. Additionally, the first record from Indonesia of the frequently misidentified D. aquatica is reported.

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Kukulczanka, K., and B. Czastka. "IN VITRO CULTURES OF DROSERA SP." Acta Horticulturae, no. 226 (June 1988): 631–34. http://dx.doi.org/10.17660/actahortic.1988.226.86.

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Anthony, Janice L. "In Vitro Propagation of Drosera spp." HortScience 27, no. 7 (July 1992): 850. http://dx.doi.org/10.21273/hortsci.27.7.850.

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Harriman, Neil A. "Drosera (Droseraceae). Flora Neotropica Monograph 96." Economic Botany 60, no. 4 (December 2006): 392–93. http://dx.doi.org/10.1663/0013-0001(2006)60[392b:ddfnm]2.0.co;2.

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Crouch, I. J., and J. van Staden. "In vitro propagation of Drosera natalensis." South African Journal of Botany 54, no. 1 (February 1988): 94–97. http://dx.doi.org/10.1016/s0254-6299(16)31368-0.

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Thum, Martin. "The significance of opportunistic predators for the sympatric carnivorous plant species Drosera intermedia and Drosera rotundifolia." Oecologia 81, no. 3 (November 1989): 397–400. http://dx.doi.org/10.1007/bf00377090.

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Thum, M. "Segregation of habitat and prey in two sympatric carnivorous plant species, Drosera rotundifolia and Drosera intermedia." Oecologia 70, no. 4 (1986): 601–5. http://dx.doi.org/10.1007/bf00379912.

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Gonella, Paulo Minatel, Fernando Rivadavia, and Andreas Fleischmann. "Drosera magnifica (Droseraceae): the largest New World sundew, discovered on Facebook." Phytotaxa 220, no. 3 (July 24, 2015): 257. http://dx.doi.org/10.11646/phytotaxa.220.3.4.

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Drosera magnifica, a microendemic sundew discovered on a single mountain top in eastern Minas Gerais (southeastern Brazil), is described here as a new species for science. Regarded as the largest New World sundew and one of the three largest Drosera species, it was just recently discovered through photographs posted on the social network Facebook. A detailed description, remarks on ecology, habitat, and conservation, a distribution map, line drawings, and photographs are provided, as well as a comparison between the related taxa (D. graminifolia and D. spiralis). The species is considered Critically Endangered, according to the IUCN Red List categories and criteria.

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Gonella, Paulo M., and Carlos R. Lehn. "Distribution and conservation status of Drosera viridis Rivadavia (Droseraceae), including the first records from Rio Grande do Sul, Brazil, and a key to the genus in this state." Check List 16, no. 4 (July 1, 2020): 793–98. http://dx.doi.org/10.15560/16.4.793.

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Drosera viridis Rivadavia, a Brazilian endemic species of carnivorous herb, has its geographical range extended in South Brazil, including the first records for Rio Grande do Sul, from subtropical highland grasslands in the northeastern region of the state. Taxonomic notes, habitat information, an updated distribution range, and an identification key for the Drosera L. species from Rio Grande do Sul are presented. Based on the updated distributional range and potential threats in Brazil, we suggest the species to be classified as Near Threatened, following IUCN Red List categories and criteria.

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Gonella, Paulo M., and Carlos R. Lehn. "Distribution and conservation status of Drosera viridis Rivadavia (Droseraceae), including the first records from Rio Grande do Sul, Brazil, and a key to the genus in this state." Check List 16, no. 4 (July 1, 2020): 793–98. http://dx.doi.org/10.15560/16.4.813.

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Drosera viridis Rivadavia, a Brazilian endemic species of carnivorous herb, has its geographical range extended in South Brazil, including the first records for Rio Grande do Sul, from subtropical highland grasslands in the northeastern region of the state. Taxonomic notes, habitat information, an updated distribution range, and an identification key for the Drosera L. species from Rio Grande do Sul are presented. Based on the updated distributional range and potential threats in Brazil, we suggest the species to be classified as Near Threatened, following IUCN Red List categories and criteria.

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Chung, Mi Yoon, Jordi López-Pujol, and Myong Gi Chung. "Population history of the two carnivorous plants Drosera peltata var. nipponica and Drosera rotundifolia (Droseraceae) in Korea." American Journal of Botany 100, no. 11 (November 2013): 2231–39. http://dx.doi.org/10.3732/ajb.1200486.

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Bilous, S. Yu, O. O. Oliinyk, and O. O. Hunko. "Preservation of representatives the genus Drosera L. using biotechnological methods." Ukrainian Journal of Forest and Wood Science 12, no. 2 (June 30, 2021): 71–80. http://dx.doi.org/10.31548/forest2021.02.007.

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The peculiarities of obtaining planting material of rare representatives Drosera spatulate L. and Drosera aliciae L. using microclonal propagation in order to preserve and cultivate them in ex vitro conditions were studied. The method of sterilization of D. spatulate and D. aliciae explants with 80-90% obtaining aseptic material has been developed. The influence of different sterilization options on the development of microshoots has been studied. The best mode of sterilization is 0,1% solution of AgNO3 and 12.5% solution of H2O2. The features of organogenesis and regeneration of the whole organism from cultivated tissues and organs of Drosera L. was investigated. The effect of exogenous growth regulators at different stages of plant morphogenesis in vitro is shown. Improved conditions of rhizogenesis in vitro. It was found experimentally that MS nutrient media with the addition of 2 g∙l-1 PVP is optimal at the stage of introduction into culture in vitro D. spatulate and D. aliciae. The regeneration of microshoots of D. spatulate and D. aliciae depending on the type of explant and the composition of nutrient media was studied. Morphogenesis was most effective on nutrient media with the addition of 0.25 mg∙l-1 kinetin and on the hormone free MS media. Such cultivation conditions provided 100% regeneration of plants with a reproduction rate of 1:8. Studying the effect of cytokinins on the microclonal reproduction of D. spatulate and D. aliciae, it was found that the development and induction of multiple shoot formation in vitro is best performed on hormone free MS media. To induce the formation of the root system, it is necessary to add into MS nutrient media 0.5 mg∙l-1 IBA. According to the results of the research, a method of microclonal propagation was developed by cutting stem culture, which made it possible to obtain genetically stable, disease-free regenerating plants of D. spatulate and D. aliciae with an optimally formed root system and vegetative mass. The obtained homogeneous planting material can be used in floriculture, creation of terrariums, for pharmacological purposes and for the purpose of introduction. Keywords: Drosera L., microclonal reproduction, morphogenes.

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33

Wilson, Paul. "The East-facing Flowers of Drosera tracyi." American Midland Naturalist 131, no. 2 (April 1994): 366. http://dx.doi.org/10.2307/2426263.

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Ziaratnia, S. M., K. J. Kunert, and N. Lall. "Elicitation of 7-methyljuglone in Drosera capensis." South African Journal of Botany 75, no. 1 (January 2009): 97–103. http://dx.doi.org/10.1016/j.sajb.2008.08.001.

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35

Krenn, Liselotte, and Theodor Kartnig. "Sonnentau - Aktuelles über medizinisch genutzte Drosera-Arten." Zeitschrift für Phytotherapie 26, no. 4 (August 2005): 197–202. http://dx.doi.org/10.1055/s-2005-915657.

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Fleischmann, Andreas, and Paulo M. Gonella. "Typification and authorship of Drosera intermedia (Droseraceae)." TAXON 69, no. 1 (January 7, 2020): 153–60. http://dx.doi.org/10.1002/tax.12158.

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37

Länger, R., I. Pein, and B. Kopp. "Glandular hairs in the genus Drosera (Droseraceae)." Plant Systematics and Evolution 194, no. 3-4 (September 1995): 163–72. http://dx.doi.org/10.1007/bf00982853.

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38

Schlauer, Jan, and Andreas Fleischmann. "Chemical evidence for hybridity in Drosera (Droseraceae)." Biochemical Systematics and Ecology 66 (June 2016): 33–36. http://dx.doi.org/10.1016/j.bse.2016.03.005.

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39

Wawrosch, Christoph, Eva Vackar, and Brigitte Grauwald. "Variations of Naphthoquinone Levels in Micropropaaated Drosera Species In Vitro, under Qreenhouse and Outdoor Growth Conditions." Scientia Pharmaceutica 73, no. 4 (December 30, 2005): 251–62. http://dx.doi.org/10.3797/scipharm.aut-05-18.

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The naphthoquinone levels in clones of the sundew species Drosera communis, D. madagascariensis, D. peltata and D. rotundifolia were determined under in vitro, green house, and outdoor growth conditions. D. rotundifolia revealed a lower naphthoquinone content in vitro which rose upon transfer ex vitro. D. communis and D. madagascariensis exhibited higher levels in vitro which decreased in the greenhouse and further under outdoors conditions. Decreased naphthoquinone levels were found in D. peltata when in vitro cultures were moved to the greenhouse, which increased again when the plants were cultivated outdoors. The results underline that in the cultivation of the medicinally useful carnivorous genus Drosera species-specific differences in the biosynthesis of secondary metabolites under different environmental conditions have to be taken into consideration.

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40

Boonsnongcheep, Panitch, Worapol Sae-foo, Kanpawee Banpakoat, Suwaphat Channarong, Sukanda Chitsaithan, Pornpimon Uafua, Wattika Putha, Kanchanok Kerdsiri, and Waraporn Putalun. "Artificial color light sources and precursor feeding enhance plumbagin production of the carnivorous plants Drosera burmannii and Drosera indica." Journal of Photochemistry and Photobiology B: Biology 199 (October 2019): 111628. http://dx.doi.org/10.1016/j.jphotobiol.2019.111628.

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41

Alma E. Nacua and Noami D. Solano. "Drosera indica as an indoor biological control against mosquitoes." GSC Advanced Research and Reviews 5, no. 3 (December 30, 2020): 085–89. http://dx.doi.org/10.30574/gscarr.2020.5.3.0126.

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In the wild, carnivorous plants obtain some nutrients by trapping and digesting various invertebrates, and occasionally even small frogs and mammals. Because insects are one of the most common prey items for most carnivorous plants, they are sometimes called insectivorous plants The aim of this study is to identify Drosera indica indeed a carnivorous plant to control indoor mosquitoes in Metro Manila. Experimental Method of research. Controlled pot plant were placed in the Urban garden of UDM and observed to trapped insects. Another pot plant was placed inside the room that verified attracted insects. The Experimental period runs for 7 days from October 5 to 11, 2020. Conclusion: Based on the results and finding, Drosera indica is an insectivorous plant that preys on Aedes aegypti and Anopheles mosquitoes

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42

Landry, Mark, and Les C. Cwynar. "History of the endangered thread-leaved sundew (Drosera filiformis) in southern Nova Scotia." Canadian Journal of Botany 83, no. 1 (January 1, 2005): 14–21. http://dx.doi.org/10.1139/b04-137.

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We used the techniques of plant macrofossil analysis and radiocarbon dating to determine the minimum residence time of the endangered thread-leaved sundew (Drosera filiformis Raf.) in three bogs of southern Nova Scotia. The minimum residence times are 4240 cal. year BP for Swain's Road Bog, 2050 cal. year BP for Villagedale Bog, and very recent (modern radiocarbon age) for Port La Tour Bog, indicating that the species has likely been in the region for the past 4240 years. Analysis of nearby Old School Road Bog, which lacks D. filiformis today, failed to find any evidence that it formerly occurred there, suggesting that it may not have been more widespread in the past than it is today.Key words: Drosera filiformis, thread-leaved sundew, plant macrofossil analysis, radiocarbon dating, bogs, minimum residence time.

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43

Adamec, Lubomír. "Dark respiration of leaves and traps of terrestrial carnivorous plants: are there greater energetic costs in traps?" Open Life Sciences 5, no. 1 (February 1, 2010): 121–24. http://dx.doi.org/10.2478/s11535-009-0080-7.

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AbstractIn this study, O2-based dark respiration rate (RD) in leaf and trap cuttings was compared in 9 terrestrial carnivorous plant species of 5 genera to decide whether traps represent a greater energetic (maintanence) cost than leaves or photosynthetic parts of traps. RD values of cut strips of traps or leaves of terrestrial carnivorous plants submerged in water ranged between 2.2 and 8.4 nmol g−1 s−1 (per unit dry weight) in pitcher traps of the genera Sarracenia, Nepenthes, and Cephalotus, while between 7.2 and 25 nmol g−1 DW s−1 in fly-paper or snapping traps or leaves of Dionaea and Drosera. No clear relationship between RD values of traps (or pitcher walls) and leaves (or pitcher wings or petioles) was found. However, RD values of separated Drosera prolifera tentacles exceeded those of leaf lamina 7.3 times.

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Potts, Leslie, and James J. Krupa. "Does the Dwarf Sundew (Drosera brevifolia) Attract Prey?" American Midland Naturalist 175, no. 2 (April 2016): 233–41. http://dx.doi.org/10.1674/0003-0031-175.2.233.

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45

Cheek, M. R. "A New Species of Drosera from South Africa." Kew Bulletin 42, no. 3 (1987): 738. http://dx.doi.org/10.2307/4110086.

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dos Santos Silva, Tânia Regina, Mireya D. Correa A., and Tania Regina dos Santos Silva. "Drosera peruensis (Droseraceae), a New Species from Peru." Novon 12, no. 4 (2002): 543. http://dx.doi.org/10.2307/3393136.

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Ferreira, Dalva Trevisan, César Cornélio Andrei, Halha Ostrensky Saridakis, Terezinha de Jesus Faria, Elisângela Vinhato, Kátia Eliane Carvalho, Juliana Feijó Souza Daniel, Sílvio Luiz Machado, Dennis Panayotis Saridakis, and Raimundo Braz-Filho. "Antimicrobial activity and chemical investigation of Brazilian Drosera." Memórias do Instituto Oswaldo Cruz 99, no. 7 (November 2004): 753–55. http://dx.doi.org/10.1590/s0074-02762004000700016.

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Braunberger, Christina, Martin Zehl, Jürgen Conrad, Christoph Wawrosch, Jaqueline Strohbach, Uwe Beifuss, and Liselotte Krenn. "Flavonoids as chemotaxonomic markers in the genus Drosera." Phytochemistry 118 (October 2015): 74–82. http://dx.doi.org/10.1016/j.phytochem.2015.08.017.

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Sheikh, Shamimul Alam, Katsuhiko Kondo, and Yoshikazu Hoshi. "Study on Diffused Centromeric Nature of Drosera Chromosomes." CYTOLOGIA 60, no. 1 (1995): 43–47. http://dx.doi.org/10.1508/cytologia.60.43.

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Hoshi, Yoshikazu, and Katsuhiko Kondo. "Chromosome Differentiation in Drosera, Subgenus Rorella, Section Rossolis." CYTOLOGIA 63, no. 2 (1998): 199–211. http://dx.doi.org/10.1508/cytologia.63.199.

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Journal articles on the topic 'Drosera'

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