The antagonistic mechanism of Bacillus velezensis ZW10 against rice blast disease: Evaluation of ZW10 as a potential biopesticide.

Rice blast, caused by the fungus Magnaporthe oryzae, is one of the three major diseases affecting rice production and quality; it reduces rice grain yield by nearly 30%. In the early stage of this study, a strain of Bacillus velezensis with strong inhibition of M. oryzae was isolated and named ZW10....

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Autores principales: Zuo Chen, Lu Zhao, Yilun Dong, Wenqian Chen, Chunliu Li, Xiaoling Gao, Rongjun Chen, Lihua Li, Zhengjun Xu
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Publicado: Public Library of Science (PLoS) 2021
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spelling oai:doaj.org-article:7b16ad5c88cb4c7f947e55dfb65af42c2021-12-02T20:19:23ZThe antagonistic mechanism of Bacillus velezensis ZW10 against rice blast disease: Evaluation of ZW10 as a potential biopesticide.1932-620310.1371/journal.pone.0256807https://doaj.org/article/7b16ad5c88cb4c7f947e55dfb65af42c2021-01-01T00:00:00Zhttps://doi.org/10.1371/journal.pone.0256807https://doaj.org/toc/1932-6203Rice blast, caused by the fungus Magnaporthe oryzae, is one of the three major diseases affecting rice production and quality; it reduces rice grain yield by nearly 30%. In the early stage of this study, a strain of Bacillus velezensis with strong inhibition of M. oryzae was isolated and named ZW10. In vitro assays indicated prolonged germination time of conidia of M. oryzae treated with the antifungal substances of ZW10, 78% of the conidia could not form appressorium, and the conidial tubes expanded to form vacuolar structure and then shrank. The results of FDA-PI composite dyes showed that the antifungal substances of ZW10 inhibited the normal activity of M. oryzae hyphae that were rarely able to infect the epidermal cells of rice leaf sheath in vivo tests. In addition, rice treated with the antifungal substances of ZW10 showed a variety of defense responses, including activation of defense-related enzymes, increased expression of the salicylic acid pathway genes, and accumulation of hydrogen peroxide (H2O2), which might function directly or indirectly in resistance to pathogen attack. The field experiment with rice blast infection in different periods showed that the antifungal substances of ZW10 had the same control effect as carbendazim. The significant biological control activity of ZW10 and its capacity to stimulate host defenses suggest that this B. velezensis strain has the potential to be developed into a biopesticide for the biocontrol of rice blast.Zuo ChenLu ZhaoYilun DongWenqian ChenChunliu LiXiaoling GaoRongjun ChenLihua LiZhengjun XuPublic Library of Science (PLoS)articleMedicineRScienceQENPLoS ONE, Vol 16, Iss 8, p e0256807 (2021)
institution DOAJ
collection DOAJ
language EN
topic Medicine
R
Science
Q
spellingShingle Medicine
R
Science
Q
Zuo Chen
Lu Zhao
Yilun Dong
Wenqian Chen
Chunliu Li
Xiaoling Gao
Rongjun Chen
Lihua Li
Zhengjun Xu
The antagonistic mechanism of Bacillus velezensis ZW10 against rice blast disease: Evaluation of ZW10 as a potential biopesticide.
description Rice blast, caused by the fungus Magnaporthe oryzae, is one of the three major diseases affecting rice production and quality; it reduces rice grain yield by nearly 30%. In the early stage of this study, a strain of Bacillus velezensis with strong inhibition of M. oryzae was isolated and named ZW10. In vitro assays indicated prolonged germination time of conidia of M. oryzae treated with the antifungal substances of ZW10, 78% of the conidia could not form appressorium, and the conidial tubes expanded to form vacuolar structure and then shrank. The results of FDA-PI composite dyes showed that the antifungal substances of ZW10 inhibited the normal activity of M. oryzae hyphae that were rarely able to infect the epidermal cells of rice leaf sheath in vivo tests. In addition, rice treated with the antifungal substances of ZW10 showed a variety of defense responses, including activation of defense-related enzymes, increased expression of the salicylic acid pathway genes, and accumulation of hydrogen peroxide (H2O2), which might function directly or indirectly in resistance to pathogen attack. The field experiment with rice blast infection in different periods showed that the antifungal substances of ZW10 had the same control effect as carbendazim. The significant biological control activity of ZW10 and its capacity to stimulate host defenses suggest that this B. velezensis strain has the potential to be developed into a biopesticide for the biocontrol of rice blast.
format article
author Zuo Chen
Lu Zhao
Yilun Dong
Wenqian Chen
Chunliu Li
Xiaoling Gao
Rongjun Chen
Lihua Li
Zhengjun Xu
author_facet Zuo Chen
Lu Zhao
Yilun Dong
Wenqian Chen
Chunliu Li
Xiaoling Gao
Rongjun Chen
Lihua Li
Zhengjun Xu
author_sort Zuo Chen
title The antagonistic mechanism of Bacillus velezensis ZW10 against rice blast disease: Evaluation of ZW10 as a potential biopesticide.
title_short The antagonistic mechanism of Bacillus velezensis ZW10 against rice blast disease: Evaluation of ZW10 as a potential biopesticide.
title_full The antagonistic mechanism of Bacillus velezensis ZW10 against rice blast disease: Evaluation of ZW10 as a potential biopesticide.
title_fullStr The antagonistic mechanism of Bacillus velezensis ZW10 against rice blast disease: Evaluation of ZW10 as a potential biopesticide.
title_full_unstemmed The antagonistic mechanism of Bacillus velezensis ZW10 against rice blast disease: Evaluation of ZW10 as a potential biopesticide.
title_sort antagonistic mechanism of bacillus velezensis zw10 against rice blast disease: evaluation of zw10 as a potential biopesticide.
publisher Public Library of Science (PLoS)
publishDate 2021
url https://doaj.org/article/7b16ad5c88cb4c7f947e55dfb65af42c
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