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Effectiveness of carboxylic acids from Pichia membranifaciens against coffee rust Ciência e Agrotecnologia
Melchor,Rosa Laura Andrade; Rosales,Violeta Galaviz; Pérez,Maria Concepción Garcia; Fernández,Silvia Piñero; Álvarez,Gabriela Olmedo; Mastache,Jose Manuel Narváez.
ABSTRACT Coffee rust is a fungal disease that has affected every coffee-producing region in the world. Given that the effectivity of the protectant and systemic fungicides applied routinely to control the spread of the causative agent of the disease (Hemileia vastatrix) has gradually diminished, besides are harmful to mammals and ecosystems, the objective of this work was to search for a mixture of harmless natural compounds with the potential to be applied in the field. So, a yeast strain producing a battery of long-chain carboxylic acids (CA) with fungicide properties was isolated from soil of coffee crop and identified as Pichia membranifaciens by ITS sequencing. Culture conditions of the yeast were optimized and the CA in the solution were...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Natural compounds; Yeast identification; Field studies; Antagonism..
Ano: 2018 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1413-70542018000100042
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Effects of spermicidal extracts of Ananas comosus (pineapple) and Sapindus saponaria (jaboncillo) on cell viability, cytotoxicity and apoptosis Plantas Medicinales
Ospina Medina,Luisa; Álvarez Gómez,Ángela; Cortés Mancera,Fabian; Cadavid Jaramillo,Ángela; Cardona Maya,Walter.
Introduction: there are natural products from different fruits and plants that are effective as spermicides, but it is important that they should have little or no cytotoxic effect on epithelial cells. Currently available spermicides with nonoxynol-9 cause vaginal irritation and damage to the vaginal mucosa, the uterine epithelium, and the microbial flora of the vagina. Objective: to elucidate the effect on cell viability, cytotoxicity and apoptosis of spermicidal extracts of Ananas comosus (L.) Merr. and Sapindus saponaria L. over HeLa cell line. Methods: both extracts were evaluated on HeLa cell line using the novel ApoTox-Glo™ Triplex Assay to determine whether cell viability, cytotoxicity and apoptosis were affected. Results: it was...
Tipo: Journal article Palavras-chave: Natural compounds; Spermicides; Cell cytotoxicity; Cell viability; Cell apoptosis; Ananas comosus; Sapindus saponaria.
Ano: 2013 URL: http://scielo.sld.cu/scielo.php?script=sci_arttext&pid=S1028-47962013000400005
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GC-MS ANALYSIS AND ANTIFUNGAL ACTIVITY OF METHANOLIC ROOT EXTRACT OF Chenopodium album AGAINST Sclerotium rolfsii Planta Daninha
ALI,A.; JAVAID,A.; SHOAIB,A..
ABSTRACT Sclerotium rolfsii is a soil-borne fungal plant pathogen that causes diseases in more than 500 plant species. Chemical fungicides used to control this disease cause environmental pollution, therefore, plant derived compounds can be used as alternative to synthetic fungicides to reduce environmental pollution. Chenopodium album is a weed of family Chenopodiaceae that is used as food and also has medicinal importance. In the present study, antifungal activity of methanolic root extract of C. album was evaluated against S. rolfsii using six concentrations viz. 0.5, 1.0, 1.5, 2.0, 2.5 and 3.0 g 100 mL-1 amended in malt extract as growth medium. All the root extract concentrations significantly reduced fungal biomass by 15-58% over control. Gas...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Biological control; Natural compounds; Reduction use of agrochemical.
Ano: 2017 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-83582017000100245
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Genotoxic effects of Tabebuia impetiginosa (Mart. Ex DC.) Standl. (Lamiales, Bignoniaceae) extract in Wistar rats Genet. Mol. Biol.
Lemos,Odilon A.; Sanches,Júlio C.M.; Silva,Ícaro E.F.; Silva,Márcio L.A.; Vinhólis,Adriana H.C.; Felix,Mireille A.P.; Santos,Raquel A.; Cecchi,Andréa O..
Tabebuia sp. is native to tropical rain forests throughout Central and South America. Although the biological and pharmacological effects of bark extracts have been intensely studied, little is known on the extract obtained from the flower. Herein, the genotoxic potential of a flower extract from T. impetiginosa ("ipê roxo") on the blood and liver cells of Wistar rats was evaluated. Experimental procedures involved only male animals. Graduated concentrations of the extract, viz., 100, 300 and 500 mg kg-1 of body weight, were gavage-administered and 24 h latter cells were collected and processed for analysis. With the exception of the 100 mg kg-1 dose, a significant increase in DNA damage was noted, when compared with a negative control group. Although the...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Tabebuia impetiginosa; Comet assay; Wistar rats; Natural compounds.
Ano: 2012 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-47572012000300017
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Rosmarinus officinalis L. increases Caenorhabditis elegans stress resistance and longevity in a DAF-16, HSF-1 and SKN-1-dependent manner BJMBR
Zamberlan,D.C.; Amaral,G.P.; Arantes,L.P.; Machado,M.L.; Mizdal,C.R.; Campos,M.M.A.; Soares,F.A.A..
Improving overall health and quality of life, preventing diseases and increasing life expectancy are key concerns in the field of public health. The search for antioxidants that can inhibit oxidative damage in cells has received a lot of attention. Rosmarinus officinalis L. represents an exceptionally rich source of bioactive compounds with pharmacological properties. In the present study, we explored the effects of the ethanolic extract of R. officinalis (eeRo) on stress resistance and longevity using the non-parasitic nematode Caenorhabditis elegans as a model. We report for the first time that eeRo increased resistance against oxidative and thermal stress and extended C. elegans longevity in an insulin/IGF signaling pathway-dependent manner. These data...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Caenorhabditis elegans; Natural compounds; Rosemary; Daf-2; Stress resistance; Aging.
Ano: 2016 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-879X2016000900601
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