Crescimento e esporulação de Bipolaris euphorbiae cultivado sob diferentes condições nutricionais

Penariol, Mara Cristina; Monteiro, Ana Ruth Macêdo; Pitelli, Robinson Antônio

doi:10.1590/s0103-84782008000700016

Cited by 7 publications

(4 citation statements)

References 7 publications

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“…For use in the tests, the FCAV#569 isolate of B. euphorbiae was grown in Petri dishes containing the Pontecorvo minimal medium, modified by supplementation with peptone (2 g L -1 ) and with the substitution of glucose by starch (10 g L -1 ) (Penariol et al, 2008b). The fungus was kept at 25 ± 0.5°C for 10 days, with a 12-h photoperiod.…”

Section: Methodsmentioning

confidence: 99%

Selection of anti-wetting agents and photoprotectants compatible with a soybean weed control bioagent

Machado¹,

Monteiro²,

Mochi³

2016

Afr. J. Microbiol. Res.

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Adjuvants incorporation at formulations can positively influence the performance of bioagent control, contributing to preservation of the inoculum until being used. Adjuvants should not be toxic to pathogen and tests that evaluate the sensitivity of biologic products are essential. The aim of this study was to analyze the compatibility of the anti-wetting agents microcrystalline cellulose, anhydrous sodium carbonate, magnesium oxide, talc, calcium carbonate, silicon dioxide, and photoprotectants NeoHeliopan ® AV, NeoHeliopan ® E1000, Eusolex ® 6007, NeoHeliopan ® Hydro, Tinosorb ® M, Eusolex ® 232 and a Complex filters UVA/UVB with the fungus Bipolaris euphorbiae, in order to select products to formulate a fungus-based bioherbicide. All products were used in concentrations of 0.01, 0.05, 0.1, 0.5 and 1%. After evaluating vegetative growth, sporulation, and germination, the products were toxicologically classified by calculating the biological index. The anti-wetting agents calcium carbonate, talc, microcrystalline cellulose, and silicium dioxide did not interfere in the development of the fungus, and were deemed compatible. The photoprotectant Tinosorb ® M was classified as compatible with the fungus in all concentrations used, a similar outcome to Eusolex ® 6007, except at 1.0% concentration. Most of the other photoprotectants were compatible in concentrations ranging between 0.01 and 0.1%, except for Complex filters UVA/UVB at 0.05% and NeoHeliopan ® E1000 at 0.1%. NeoHeliopan ® Hydro was rated moderately toxic to the fungus in all concentrations used. Conidial germination was less affected than growth and sporulation.

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Section: Methodsmentioning

confidence: 99%

Selection of anti-wetting agents and photoprotectants compatible with a soybean weed control bioagent

Machado¹,

Monteiro²,

Mochi³

2016

Afr. J. Microbiol. Res.

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“…When setting up the assays, the fungus was cultivated in Petri dishes containing modified minimal Pontecorvo medium (Pontecorvo et al 1953) and modified by Penariol et al (2008). The final composition of the growth medium was: 6.0 g NaNO 3 ; 1.52 g KH 2 PO 4 ; 0.52 g MgSO 4 7H 2 O; 0.52 g KCl; 0.01 g FeSO 4 ; 0.01 g ZnSO 4 ; 10 g starch; 2.0 g peptone, 15 g agar and 1,000 ml distilled water.…”

Section: Fungusmentioning

confidence: 99%

“…The nutritional needs of B. euphorbiae were studied by Penariol et al (2008), who observed enhanced growth and sporulation when using starch and sodium nitrate, respectively, as sources of carbon and nitrogen, and monobasic potassium phosphate and calcium phosphate as sources of phosphorus. According to these authors, enrichment of the growth medium by adding peptone and yeast extract had a positive influence on growth and sporulation, while the production of conidia was the only factor affected by the addition of vitamins.…”

Section: Introductionmentioning

confidence: 99%

Reaction of Bipolaris euphorbiae to environmental factors and its tolerance to solar and ultraviolet radiation

Moraes

Monteiro

Mochi

2010

World J Microbiol Biotechnol

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The determination of the ideal cultivation conditions and the knowledge of solar radiation tolerance are important aspects that must be investigated for the use of Bipolaris euphorbiae Muchovej and Carvalho as a biocontrol agent. The present study was done to assess the growth rate, sporulation and viability of the fungus cultivated under different conditions of the initial pH value of the growth medium, temperature and photoperiod. The tolerance of this fungus' conidia to light from a source simulating solar and ultraviolet radiation was also assessed. B. euphorbiae was affected by different pH values of the growth medium being 6.0 the adequate pH for fungus cultivation. Incubation of the fungus under temperatures of 22, 25 and 28°C enhanced mycelium growth, while sporulation and viability of conidia were better at 22 and 16°C. Different regimens of exposure to light of fungal cultures only affect sporulation. Conidia exposed to solar and ultraviolet radiation for 8 h and 90 min, respectively, presented viabilities higher than 92%, indicating high tolerance levels to radiation exposure.

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“…A interferência das plantas daninhas sobre o desenvolvimento e produtividade das culturas agrícolas vem se agravando, interferindo diretamente no potencial produtivo das culturas, que podem chegar à perda total da lavoura, e por consequência, a grandes perdas econômicas. As plantas daninhas apresentam elevada capacidade em competir com plantas cultivadas por água, luz, nutrientes, energia térmica e dióxido de carbono (Penariol et al, 2008;Suriyagoda et al, 2014). As plantas daninhas apresentam grande agressividade contra as culturas agrícolas, por serem capazes de germinar, de maneira descontínua, através de inúmeros e complexos mecanismos de dormência de suas sementes, podendo até germinar e emergir das camadas mais profundas do solo.…”

Section: Introductionunclassified

Efeito de metabólitos secundários produzidos por Phoma dimorpha sobre a germinação e crescimento de sementes de diferentes espécies vegetais

et al. 2020

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Algumas espécies do gênero Phoma são consideradas fonte potencial de substâncias biologicamente ativas, as quais podem ser utilizadas no meio agrícola. O objetivo deste estudo foi avaliar o efeito dos metabólitos secundários presentes no caldo fermentado do fungo Phoma dimorpha sobre a germinação, crescimento, massa fresca e seca de plântulas e em folhas destacadas de diferentes espécies de plantas bioindicadoras e daninhas encontradas em diferentes regiões do mundo: Cucumis sativus, Triticum aestivum, Amaranthus cruentus, Bidens pilosa e Echinochloa sp. Observou-se efeito significativo sobre a germinação de todas as espécies avaliadas. As sementes das espécies dicotiledôneas (Cucumis sativus, Amaranthus cruentus e Bidens pilosa) mostraram-se mais sensíveis, inibindo totalmente a germinação. As sementes das espécies monocotiledôneas apresentaram-se resistentes, com maior capacidade de germinação. Em geral, o crescimento das plântulas das espécies estudadas foi inibido pelo caldo fermentado do fungo P. dimorpha. No teste em folha destacada, lesões foram observadas, com amarelecimento e necrose acentuada nas folhas de todas as espécies estudadas. O caldo fermentado do fungo P. dimorpha apresenta compostos biologicamente ativos, com ação bioherbicida com alta atividade fitotóxica.

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Crescimento e esporulação de Bipolaris euphorbiae cultivado sob diferentes condições nutricionais

Abstract: Bipolaris euphorbiae

Cited by 7 publications

References 7 publications

Selection of anti-wetting agents and photoprotectants compatible with a soybean weed control bioagent

Selection of anti-wetting agents and photoprotectants compatible with a soybean weed control bioagent

Reaction of Bipolaris euphorbiae to environmental factors and its tolerance to solar and ultraviolet radiation

Efeito de metabólitos secundários produzidos por Phoma dimorpha sobre a germinação e crescimento de sementes de diferentes espécies vegetais

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