scholarly journals Dinactin from a new producer, Streptomyces badius gz-8, and its antifungal activity against the rubber anthracnose fungus Colletotrichum gloeosporioides

2020 ◽  
Vol 240 ◽  
pp. 126548
Author(s):  
Kai Zhang ◽  
Liushuang Gu ◽  
Yuefeng Zhang ◽  
Zhiqiang Liu ◽  
Xiaoyu Li
Keyword(s):  
Antifungal Activity ◽  
Colletotrichum Gloeosporioides

scholarly journals Antifungal Activity of Propyl Disulfide from Neem (Azadirachta indica) in Vapor and Agar Diffusion Assays against Anthracnose Pathogens (Colletotrichum gloeosporioides and Colletotrichum acutatum) in Mango Fruit

2021 ◽  
Vol 9 (4) ◽  
pp. 839
Author(s):  
Muhammad Rafiullah Khan ◽  
Vanee Chonhenchob ◽  
Chongxing Huang ◽  
Panitee Suwanamornlert
Keyword(s):  
Antifungal Activity ◽  
Mycelial Growth ◽  
Colletotrichum Gloeosporioides ◽  
Colletotrichum Acutatum ◽  
Model Parameters ◽  
Pathogenicity Test ◽  
Agar Diffusion ◽  
Wide Range ◽  
Significant Difference ◽  
Diffusion Assay

Microorganisms causing anthracnose diseases have a medium to a high level of resistance to the existing fungicides. This study aimed to investigate neem plant extract (propyl disulfide, PD) as an alternative to the current fungicides against mango’s anthracnose. Microorganisms were isolated from decayed mango and identified as Colletotrichum gloeosporioides and Colletotrichum acutatum. Next, a pathogenicity test was conducted and after fulfilling Koch’s postulates, fungi were reisolated from these symptomatic fruits and we thus obtained pure cultures. Then, different concentrations of PD were used against these fungi in vapor and agar diffusion assays. Ethanol and distilled water were served as control treatments. PD significantly (p ≤ 0.05) inhibited more of the mycelial growth of these fungi than both controls. The antifungal activity of PD increased with increasing concentrations. The vapor diffusion assay was more effective in inhibiting the mycelial growth of these fungi than the agar diffusion assay. A good fit (R2, 0.950) of the experimental data in the Gompertz growth model and a significant difference in the model parameters, i.e., lag phase (λ), stationary phase (A) and mycelial growth rate, further showed the antifungal efficacy of PD. Therefore, PD could be the best antimicrobial compound against a wide range of microorganisms.

scholarly journals Physicochemical characterization, antioxidant and antifungal activity of three stingless bee pollen aggregate (Apidae: Meliponini) from Soconusco, Chiapas

2020 ◽  
Vol 39 (1) ◽  
Author(s):  
Víctor Albores-Flores ◽  
Erick Saavedra-Camacho ◽  
José Alfonso López-García ◽  
Julieta Grajales-Conesa ◽  
Liliana Carolina Córdova-Albores
Keyword(s):  
Antifungal Activity ◽  
Colletotrichum Gloeosporioides ◽  
Physicochemical Characterization ◽  
Stingless Bee ◽  
Melipona Beecheii ◽  
Bee Pollen ◽  
Scaptotrigona Mexicana ◽  
Tetragonisca Angustula

<p>La interacción planta-abeja puede generar productos de la colmena con diferentes características fisicoquímicas, bioactivos y actividad antimicrobiana. Por lo cual, en este trabajo se determinó la composición química de conglomerados o agregados de polen colectados de 12 colmenas establecidas en Chiapas, México, en los municipios Tapachula, Mazatán y Cacahoatán, dentro de tres meliponarios comerciales asociados a las especies: <em>Melipona beecheii</em>, <em>Scaptotrigona mexicana</em> y <em>Tetragonisca angustula</em>. Asimismo, se evaluó el efecto de los agregados de polen en <em>Colletotrichum gloeosporioides</em>. Se encontró una composición química muy diversa independientemente de la especie de abeja. El polen obtenido de colmenas con <em>M. beecheii</em> tuvieron la mayor cantidad de fenoles, flavonoides y acidez libre. Estas propiedades, en adición de la capacidad antioxidante (trolox), glucosa y pH, estuvieron asociados a la inhibición del crecimiento <em>in vitro</em> de<em> C. gloeosporioides</em>. La velocidad de crecimiento radial del hongo durante nueve días fue de 0.013 a 0.009 mm h-1 con extractos de polen, 44 % menor que el efecto del clorotalonil. La actividad antifúngica de los extractos de polen fue de 65 y 37 % para <em>M. beecheii</em>, 57 y 16 % para <em>T. angustula</em> y 60 y 30 % para S. mexicana, respecto al tratamiento testigo y a la dosis más alta de clorotalonil, respectivamente.</p>

scholarly journals Antifungal activity of native yeasts from different microenvironments against Colletotrichum gloeosporioides on ripe olive fruits

2018 ◽  
Vol 120 ◽  
pp. 43-51 ◽  
Author(s):  
Virginia M. Pesce ◽  
María C. Nally ◽  
Gabriela P. Carrizo ◽  
Cecilia Rojo ◽  
Beatriz A. Pérez ◽  
...  
Keyword(s):  
Antifungal Activity ◽  
Colletotrichum Gloeosporioides

scholarly journals Evaluation of the antifungal activity by plant extracts against Colletotrichum gloeosporioides Penz

2008 ◽  
Vol 32 (2) ◽  
pp. 420-428 ◽  
Author(s):  
Polyanna Alves Silva ◽  
Denilson Ferreira Oliveira ◽  
Ney Robson Taironi do Prado ◽  
Douglas Antônio de Carvalho ◽  
Gilvane Aparecida de Carvalho
Keyword(s):  
Antifungal Activity ◽  
Freeze Drying ◽  
Colletotrichum Gloeosporioides ◽  
Plantago Lanceolata ◽  
Stevia Rebaudiana ◽  
Tween 80 ◽  
In Vitro Assays ◽  
Bioactive Substances ◽  
Stevia Rebaudiana Bertoni

Aiming to develop more efficient and environmental friendly methods than those available to control Colletotrichum gloeosporioides Penz, which causes blister spot in coffee trees, a search for plants able to produce substances active against such pathogen was carried out. Thus, extracts of 48 plant species, collected at Alto Rio Grande region, in Minas Gerais, were prepared and submitted to in vitro assays with that fungus. The best results were obtained with the extracts prepared from Digitalis lanata Ehrh, Origanum manjorona L., Plantago lanceolata Hook. and Stevia rebaudiana (Bertoni) Bertoni, which inhibited C. gloeosporioides spores germination. After dilution of some active extracts with aqueous 1 % Tween 80 solution in a 1:2 or 1:3 ratio (extract:aqueous solution), their antifungal activity vanished. Some of the active extracts were also submitted to freeze drying and none of them presented any alteration in their antifungal activity. Concluding, several plants presented potential to be used in the search for new bioactive substances to control C. gloeosporioides, especially O. manjorona L., which inhibited 96 % of the fungus spores germination.

scholarly journals Antifungal Metabolites From Alternaria atrans: An Endophytic Fungus in Psidium guajava

2019 ◽  
Vol 14 (5) ◽  
pp. 1934578X1984411 ◽  
Author(s):  
Zhi Yang ◽  
Wen-Jia Dan ◽  
Yi-Xiao Li ◽  
Guang-Rui Peng ◽  
An-Ling Zhang ◽  
...  
Keyword(s):  
Antifungal Activity ◽  
Medicinal Plant ◽  
Inhibitory Activity ◽  
Colletotrichum Gloeosporioides ◽  
Fusaric Acid ◽  
Alternaria Solani ◽  
Psidium Guajava ◽  
Inhibitory Effect ◽  
Solid Culture ◽  
Antifungal Metabolites

Six metabolites (1–6), including 1 new fusaric acid derivative, designated atransfusarin (1), and 5 known compounds, (3 R,6 R)-3-benzyl-6-isopropyl-4-methylmorpholine-2,5-dione (2), daucoterol (3), adenosine (4), cerebroside B (5), and 2,3-dihydroxypropyl ( Z,Z)-9,12-octadecadienate (6), were isolated from the solid culture of an endophytic Alternaria atrans MP-7, associated with the medicinal plant Psidium guajava. The structure of the new compound was elucidated by spectral data. The antifungal test indicated that (3 R,6 R)-3-benzyl-6-isopropyl-4-methylmorpholine-2,5-dione (2) showed obvious inhibitory activity against Alternaria solani, Colletotrichum gloeosporioides, and Phyricularia grisea. Compared to fusaric acid (1a), even though the antifungal activity of atransfusarin (1) against A. solani, C. gloeosporioides, and P. grisea was greatly decreased, its inhibitory effect against Botrytis cinerea was still retained.

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