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Academic literature on the topic 'Hibiscus acetosella'
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Journal articles on the topic "Hibiscus acetosella"
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Lyu, Jae Il, Jaihyunk Ryu, Chang Hyun Jin, et al. "Phenolic Compounds in Extracts of Hibiscus acetosella (Cranberry Hibiscus) and Their Antioxidant and Antibacterial Properties." Molecules 25, no. 18 (2020): 4190. http://dx.doi.org/10.3390/molecules25184190.
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Hibiscus species are rich in phenolic compounds and have been traditionally used for improving human health through their bioactive activities. The present study investigated the phenolic compounds of leaf extracts from 18 different H. acetosella accessions and evaluated their biofunctional properties, focusing on antioxidant and antibacterial activity. The most abundant phenolic compound in H. acetosella was caffeic acid, with levels ranging from 14.95 to 42.93 mg/100 g. The antioxidant activity measured by the ABTS assay allowed the accessions to be classified into two groups: a high activity group with red leaf varieties (74.71–84.02%) and a relatively low activity group with green leaf varieties (57.47–65.94%). The antioxidant activity was significantly correlated with TAC (0.933), Dp3-Sam (0.932), Dp3-Glu (0.924), and Cy3-Sam (0.913) contents (p < 0.001). The H. acetosella phenolic extracts exhibited antibacterial activity against two bacteria, with zones of inhibition between 12.00 and 13.67 mm (Staphylococcus aureus), and 10.67 and 13.33 mm (Pseudomonas aeruginosa). All accessions exhibited a basal antibacterial activity level (12 mm) against the Gram-positive S. aureus, with PI500758 and PI500764 exhibiting increased antibacterial activity (13.67 mm), but they exhibited a more dynamic antibacterial activity level against the Gram-negative P. aeruginosa.
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Boyd, David W., and Christopher L. Cheatham. "Evaluation of Twelve Genotypes of Hibiscus for Resistance to Hibiscus Sawfly, Atomacera decepta Rohwer (Hymenoptera: Argidae)." Journal of Environmental Horticulture 22, no. 3 (2004): 170–72. http://dx.doi.org/10.24266/0738-2898-22.3.170.
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Abstract Twelve genotypes of hibiscus were evaluated for resistance to hibiscus sawfly, a minor pest of hibiscus. Evaluations were conducted by counting eggs deposited on the hibiscus and larvae feeding on the hibiscus. Plants were evaluated at the end of the study with a damage rating. Three genotypes demonstrated resistance or tolerance to sawfly feeding: Hibiscus acetosella, H. aculeatus, and H. grandiflora. All three of these genotypes had few, if any, eggs or larvae and were given the lowest damage rating among the genotypes evaluated.
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Moraes, Rodrigo Miranda, Fernanda Carlota Nery, Mayara Caroline Carvalho Pinto, Renato Paiva, and Sandro Barbosa. "Conservation of Hibiscus acetosella germplasm by seed cryopreservation." 2019 13, (03) 2019 (2019): 372–79. http://dx.doi.org/10.21475/ajcs.19.13.03.p1209.
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Hibiscus acetosella (Malvaceae) is a shrub of great importance for landscaping, food and medicinal purposes. The objective of this study was to preserve H. acetosella germplasm by seed cryopreservation. Half of the seed batch was scarified and the other half was kept intact. Cryopreservation occurred by immersion in liquid nitrogen for 1 hour. Moisture content (MC%), germination percentage (G%), germination speed index (GSI), normal seedling formation (NS%), shoot length (SL), dry matter (DM), biometry and plant survival were evaluated after treatment. MC% ranged between 7.7% and 6.65% in intact and scarified seeds, respectively. Scarification raised G% and GSI compared to intact seeds. Intact and scarified seeds had 100% and 70% NS%, respectively, when not cryopreserved. Cryopreservation reduced NS% to 62% and 12.75%, respectively. The highest SL was observed in intact and non-cryopreserved seeds, with an average of 10.21 cm in height. However, the cryopreservation of intact seeds reduced SL by about 50%, and scarification led to a further reduction, either with (3.32 cm) or without (2.47 cm) cryopreservation. Seedlings from intact and non-cryopreserved seeds showed higher DM in relation to seedlings from cryopreserved seeds. The association of cryopreservation and scarification further reduced DM. The cryopreservation of intact seeds yielded 100% survival at the end of the acclimatization process. However, cryopreservation of scarified seeds reduced the survival percentage to 15%. Changes in color were observed for seeds scarified and subjected to cryopreservation. Thus, cryopreservation is considered an efficient technique for the conservation of intact H. acetosella seeds in the long term.
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Contreras, Ryan N., John M. Ruter, and Wayne W. Hanna. "An Oryzalin-induced Autoallooctoploid of Hibiscus acetosella ‘Panama Red’." Journal of the American Society for Horticultural Science 134, no. 5 (2009): 553–59. http://dx.doi.org/10.21273/jashs.134.5.553.
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Hibiscus acetosella Welw. ex Hiern. ‘Panama Red’ PP20,121 (Malvaceae) has generated public and grower interest due to its attractive red foliage and vigorous growth, however, a horticultural goal is to develop more compact forms. Even though organs of induced polyploids are often larger than the wild type, whole plants are often shorter in stature. Three studies were conducted to induce polyploidy and to evaluate the growth and reproductive potential of the resulting polyploids. In study 1, seeds were soaked for 24 hours in aqueous solutions of 0%, 0.2%, 0.4%, or 0.5% colchicine (w/v) plus 0.5% dimethyl sulfoxide. In studies 2 and 3, apical meristems of seedlings at the cotyledon stage were treated for 1 or 3 days with 0, 50, 100, or 150 μm oryzalin solidified with 0.8% agar. Visual observations and measurement of guard cells were used to identify plants that potentially had their chromosome number doubled. Flow cytometry of nuclei stained with DAPI was used for confirmation of polyploidy. No induced polyploidy was observed following seed treatment with colchicine at the rates and duration used in this study. One-time application of 50 μm oryzalin resulted in a single mixoploid (4x + 8x) in which the ploidy of the L-I, L-II, and L-III histogenic layers were identified as a 4–4-4 + 8, respectively. Three-day applications with 100 and 150 μm oryzalin resulted in an octoploid (8x) and a mixoploid (4x + 8x), respectively. The mixoploid from the 3-day treatment stabilized at the 8x level before flowering, but was identified as a 4 + 8-x-4 cytochimera. Plant height was reduced, leaves were smaller, internodes were shorter, and canopy volume was reduced in the octoploid (8x) form compared with the tetraploid (4x) form. Furthermore, in contrast to the tetraploid, the octoploid produced no self-pollinated seed and performed poorly as a staminate and pistillate parent in controlled crosses. This represents the first time oryzalin has been reported to induce polyploidy in Hibiscus L. section Furcaria DC. H. acetosella is an allotetraploid species with the genome composition AABB. The resulting autoallooctoploid (AAAABBBB) form of ‘Panama Red’ exhibits a more compact habit and reduced production of seed.
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Thungmungmee, Suradwadee, Nakuntwalai Wisidsri, and Warachate Khobjai. "Antioxidant Activities of Chaba Maple (Hibiscus acetosella) Flower Extract." Applied Mechanics and Materials 886 (January 2019): 34–39. http://dx.doi.org/10.4028/www.scientific.net/amm.886.34.
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Phenolic compounds are a large group of phytochemical compounds in plants which have antioxidant activity. Hibiscus species were used in traditional medicine in North-America with biological activities. In this study, total phenolic content, total flavonoid content and antioxidant activities of Chaba maple (Hibiscus acetosella) flower extract (CFE) in Thailand were investigated. The total phenolic and flavonoid contents were determined by Folin-Ciocalteu assay and aluminum chloride colorimetric method, respectively. Antioxidant activities of CFE were examined by DPPH radical scavenging, ferric reducing antioxidant power (FRAP) and nitric oxide (NO) radical scavenging ability methods. The results showed that total phenolic content and total flavonoid content were 91.22±0.68 mg gallic acid equivalent/g fresh matter and 0.31±0.01 mg quercetin equivalent/g fresh matter, respectively. For antioxidant activities, IC50 of DPPH radical scavenging was 57.93±0.37 μg/ml, the power of ferric reducing was 1,707.18±1.99 μM and IC50 of NO radical scavenging was 229.30±0.71 μg/ml. In conclusion, CFE could be potentially used as a new natural bioactive ingredient for nutritional supplements and cosmetics application.
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Bayer, Amanda, John Ruter, and Marc W. van Iersel. "Elongation of Hibiscus acetosella Under Well-watered and Drought-stressed Conditions." HortScience 51, no. 11 (2016): 1384–88. http://dx.doi.org/10.21273/hortsci11039-16.
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Controlling the elongation of ornamental plants is commonly needed for shipping and aesthetic purposes. Drought stress can be used to limit elongation, and is an environmentally friendly alternative to plant growth regulators (PGRs). However, growers can be reluctant to expose plants to drought stress because they do not want to negatively affect overall plant quality and marketability. Knowing how and when stem elongation is affected by water availability will help to increase our understanding of how elongation can be controlled without reducing plant quality. Rooted Hibiscus acetosella Welw. ex Hiern. cuttings were grown in a growth chamber set to a 12-hour photoperiod at 25 °C. Two plants of similar size were used for each replication of the study to compare growth under well-watered and drought-stressed conditions. Time lapse photography was used to determine the diurnal patterns of elongation over the course of the replications. Evapotranspiration was measured using load cells. Well-watered and drought-stressed plants had similar diurnal patterns of elongation and evapotranspiration, demonstrating that both follow circadian rhythms and are not just responding to environmental conditions. Stem elongation was greatest at night and coincided with evapotranspiration decreases, with greatest elongation shortly after the onset of darkness. Elongation was minimal between 800 and 1000 hr when evapotranspiration increases. During the drought-stress portion of the replications, elongation of drought-stressed plants was 44% less than well-watered plants. Final plant height and shoot dry weight for the drought-stressed plants were 21% and 30% less than well-watered plants, respectively. Total leaf area, number of leaves, and number of new visible internodes were greater for well-watered plants than drought-stressed plants. Average length of visible internodes and leaf size were similar for drought-stressed and well-watered plants. If growers want to use drought stress for elongation control, they should ensure that plants are drought stressed before the onset of and during the dark period, when most elongation occurs.
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Masnadi, Masnadi. "Keanekaragaman Family Malvaceae Di Hutan Taman Eden 100 Sebagai Bahan Perangkat Pembelajaran Biologi." Best Journal (Biology Education, Sains and Technology) 2, no. 2 (2019): 32–41. http://dx.doi.org/10.30743/best.v2i2.1816.
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Penelitian di Hutan Taman Eden 100 yang terletak di kawasan Lumbang Rang, Desa Sionggang Utara, Kec.Lumban Julu, Kab. Toba Samosir Sumatera Utara telah dilakukan selama 3 bulan yang dilaksanakan daribulan April sampai dengan bulan Juni 2019. Penelitian dilakukan dengan menggunakan “Metode Survey atauEksplorasi”. Tujuan penelitian untuk mendapatkan data spesies dari tumbuhan family Malvaceae yang adadi hutan Taman Eden 100 kemudian dibuat herbarium dan untuk menghasilkan perangkat pembelajaranberupa modul sebagai bahan ajar Biologi mata kuliah Taksonomi Tumbuhan Tinggi. Hasil penelitianmenunjukkan bahwa terdapat 12 jenis tumbuhan family Malvaceae dengan 6 genus Malvaceae yaituAbelmoschus, Abutilon, Hibiscus, Malvaviscus, Sida dan Urena dengan 12 jenis Malvaceae yaituAbelmoschus moschatus, Abutilon megapotamicum, Hibiscus rosa-sinensis, Hibiscus rosa-sinensis ‘DaintyPink’, Hibiscus rosa-sinensis ‘Double’, Hibiscus rosa-sinensis ‘Variegata’, Hibiscus acetosella, Hibiscussabdariffa, Hibiscus tiliaceus, Malvaviscus arboreus, Sida rhombifolia dan Urena. Hasil Analisis datadiperkuat deskripsi dan habitat dari masing-masing jenis tumbuhan family Malvaceae. Tumbuhan familyMalvaceae yang ditemukan di hutan Taman Eden 100 masih tergolong sedikit jika dibandingkan dengan totalgenus keseluruhan yaitu Malvaceae memiliki sekitar 82 genus dengan sekitar 1.500 species yang terdiri dariHibiscus memiliki lebih dari 200, Sida memiliki 200 species, Abutilon memiliki 190 species, dan Malva 40species. Hal ini mungkin disebabkan karena daerah cakupan penjelajahan atau eksplorasi yang diteliti kurangluas.
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VILELA, THAIS C., DANIELA D. LEFFA, ADRIANI P. DAMIANI, et al. "Hibiscus acetosella extract protects against alkylating agent-induced DNA damage in mice." Anais da Academia Brasileira de Ciências 90, no. 3 (2018): 3165–74. http://dx.doi.org/10.1590/0001-3765201820180144.
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Cardoso, Paula Da Silva, Fernanda Dagostim Mandalli, Tatiana Barichello, and Patricia De Aguiar Amaral. "Potencial antibacteriano e perfil farmacognóstico das folhas de Hibiscus acetosella Welw Ex Hiern." Revista de Ciências Médicas e Biológicas 17, no. 2 (2018): 170. http://dx.doi.org/10.9771/cmbio.v17i2.25590.
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<p><strong>Introdução: </strong>As<strong> </strong><em>Hisbiscus</em> pertencentes à família <em>Malvaceae</em> são amplamente utilizadas na área ornamental e vem ganhando espaço na área alimentícia com suas flores comestíveis e corantes naturais. Alguns estudos demonstraram atividade antibacteriana de algumas espécies deste gênero frente a diversos microorganismos. Na região sul do Brasil a <em>Hibiscus acetosella,</em> também conhecida popularmente como vinagreira, possui em literatura científica pouca informação sobre sua composição química e ação antibacteriana. <strong>Objetivo</strong>: Caracterizar o perfil farmacognóstico relacionando com a ação microbiológica das folhas de <em>H. acetosella. </em><strong>Metodologia:</strong> O perfil farmacognóstico foi realizado através de testes de precipitação, teste colorimétrico, quantificação de compostos fenólicos e análise cromatográfica do extrato hidroalcoólico e das frações das folhas de <em>H. acetocella</em>. A ação antibacteriana do extrato hidroalcoólico (60 mg) e frações (25 mg) foram analisadas frente aos microorganismos <em>Staphylococcus aureus</em>, <em>Escherichia coli</em> e <em>Pseudomonas aeruginosa </em>através do método de difusão em ágar<em>.</em> <strong>Resultados: </strong>A análise farmacognóstica apresentou resultados positivos para as classes de substâncias: taninos, flavonoides, cumarinas, heterosídeos cardiotônicos e alcaloides. O extrato hidroalcoólico possui aproximadamente 352,85 mg/L de polifenóis totais. As frações com caráter mais polar (<em>n</em>-butanol e acetato de etila) apresentaram efeito relevante contra os microorganismos <em>S. aureus</em> e <em>P. aeruginosa</em>.<em> </em><strong>Conclusão: </strong>Os resultados demonstraram que ação antibacteriana pode estar relacionada com a classe de com compostos fenólicos, uma vez que as frações que apresentaram melhor resultado possuem maior concentração destes metabólitos.</p>
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Warner, Ryan M., and John E. Erwin. "Variation in Floral Induction Requirements of Hibiscus sp." Journal of the American Society for Horticultural Science 126, no. 3 (2001): 262–68. http://dx.doi.org/10.21273/jashs.126.3.262.
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Thirty-six Hibiscus L. species were grown for 20 weeks under three lighting treatments at 15, 20, or 25 ± 1.5 °C air temperature to identify flowering requirements for each species. In addition, species were subjectively evaluated to identify those species with potential ornamental significance based on flower characteristics and plant form. Lighting treatments were 9 hour ambient light (St. Paul, Minn., November to May, 45 °N), ambient light plus a night interruption using incandescent lamps (2 μmol·m-2·s-1; 2200 to 0200 hr), or ambient light plus 24-hour supplemental lighting from high-pressure sodium lamps (100 μmol·m-2·s-1). Five day-neutral, six obligate short-day, six facultative short-day, three obligate long-day, and one facultative long-day species were identified. Fifteen species did not flower. Temperature and lighting treatments interacted to affect leaf number below the first flower and/or flower diameter on some species. Hibiscus acetosella Welw. ex Hiern, H. cisplatinus St.-Hil., H. radiatus Cav., and H. trionum L. were selected as potential new commercially significant ornamental species.