SciELO - Scientific Electronic Library Online

 
vol.85Comparação entre testes de diagnóstico para tuberculose em bovinos abatidosMortalidade de Conotrachelus humeropictus pela aplicação combinada do nematoide Steinernema brazilense com o fungo entomopatogênico Beauveria bassiana índice de autoresíndice de assuntospesquisa de artigos
Home Pagelista alfabética de periódicos  

Serviços Personalizados

Journal

Artigo

Indicadores

Links relacionados

Compartilhar


Arquivos do Instituto Biológico

versão impressa ISSN 0020-3653versão On-line ISSN 1808-1657

Resumo

GARCIA, Carla et al. Antimicrobial activity of Agaricus brasiliensis on Plasmopara viticola and its effect on the induction of resistance to the control of downy mildew on ‘Isabel Precoce’. Arq. Inst. Biol. [online]. 2018, vol.85, e0052017.  Epub 23-Ago-2018. ISSN 0020-3653.  https://doi.org/10.1590/1808-1657000052017.

Agaricus brasiliensis include bioactive compounds that can act as antibiotics, bacteriostatic, fungistatic and nematostatic substances. In this sense, this study aimed to evaluate the effect of a single application of aqueous mycelial suspension (AMS) of A. brasiliensis in control of downy mildew (Plasmopara viticola) and resistance induction in ‘Isabel Precoce’ grapevines under greenhouse conditions. Treatments consisted of three doses of 1%, 5%, 10%, 15% and 20% AMS A. brasiliensis, as well as treatment with acibenzolar-S-methyl (ASM). The variables analyzed were: sporangiospore germination, disease severity, represented by the area under the disease progress curve (AUDPC), catalase enzyme activity, peroxidase and polyphenol. The 10%, 15% and 20% doses of AMS caused approximately 80% reduction in germination of P. viticola sporangiospores. The treatments did not show significant effects in reducing both the AUDPC of mildew and polyphenol oxidase enzyme activity. The A. brasiliensis aqueous mycelial suspension showed a fungitoxic effect on the germination of sporangiopores; however, it was not enough to reduce the severity of mildew in the ‘Isabel Precoce’ grapevines, even when acting on the catalase and peroxidase enzymes. Thus, experiments should be performed to verify the viability of the reproductive structures of the pathogen externalized in the vines when treated with A. brasiliensis AMS.

Palavras-chave : Plasmopara viticola; Vitis labrusca; aqueous mycelial suspension; elicitor.

        · resumo em Português     · texto em Inglês     · Inglês ( pdf )