Mechanisms involved in the biocontrol of rice sheath blight by Waitea circinata.

The BRS Tropical rice cultivar was developed for tropical floodplains, but is susceptible to sheath blight, making the Waitea circinata bioagent an important tool in managing the disease. This study aimed to assess the W. circinata mechanisms involved in the parasitism and resistance induction to sheath blight. The in vitro antagonism was assessed by optical microscopy and scanning electron microscopy, followed by quantification of the lytic enzymes involved in parasitism, such as chitinase, glucanase and protease. An effect of the W. circinata mycoparasite against Rhizoctonia solani was observed. The W. circinata application suppressed the sheath blight by up to 65 % and increased the chitinase, glucanase and lipoxygenase activity 72 h after the inoculation and that of the peroxidase 96 h after the inoculation. Thus, W. circinata showed to be efficient in suppressing sheath blight by parasitism and induced resistance via the activation of biochemical mechanisms.

Bibliographic Details

Main Authors:	SOUSA, K. C. I., CHAIBUB, A. A., CARVALHO, J. C. B. de, FILIPPI, M. C. C. de, ARAÚJO, L. G. de
Other Authors:	KELLEN CRISTHINA INÁCIO SOUSA, UNIVERSIDADE FEDERAL DE GOIÁS; AMANDA ABDALLAH CHAIBUB, UNIVERSIDADE FEDERAL DE GOIÁS; JACQUELINE CAMPOS BORBA DE CARVALHO, UNIVERSIDADE FEDERAL DE GOIÁS; MARTA CRISTINA CORSI DE FILIPPI, CNPAF; LEILA GARCÊS DE ARAÚJO, UNIVERSIDADE FEDERAL DE GOIÁS.
Format:	Artigo de periódico biblioteca
Language:	Ingles English
Published:	Pesquisa Agropecuária Tropical, v. 52, e72707, 2022. 2022-11-04
Subjects:	Waitea circinata, Bioagente, Arroz, Oryza Sativa, Controle Biológico, Rhizoctonia Solani, Queima da Bainha, Rice, Biological control,
Online Access:	http://www.alice.cnptia.embrapa.br/alice/handle/doc/1148027 https://doi.org/10.1590/1983-40632022v5272707
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