Endophytic Bacillus subtilis H17‐16 effectively inhibits Phytophthora infestans, the pathogen of potato late blight, and its potential application

BACKGROUND As a highly prevalent epidemic disease of potato, late blight caused by Phytophthora infestans poses a serious threat to potato yield and quality. At present, chemical fungicides are mainly used to control potato late blight, but long‐term overuse of chemical fungicides may lead to enviro...

Full description

Saved in:
Bibliographic Details
Published inPest management science Vol. 79; no. 12; pp. 5073 - 5086
Main Authors Zhang, Jiaomei, Huang, Xiaoqing, Yang, Shidong, Huang, Airong, Ren, Jie, Luo, Xunguang, Feng, Shun, Li, Peihua, Li, Zhengguo, Dong, Pan
Format Journal Article
LanguageEnglish
Published Chichester, UK John Wiley & Sons, Ltd 01.12.2023
Wiley Subscription Services, Inc
Subjects
Online AccessGet full text

Cover

Loading…
More Information
Summary:BACKGROUND As a highly prevalent epidemic disease of potato, late blight caused by Phytophthora infestans poses a serious threat to potato yield and quality. At present, chemical fungicides are mainly used to control potato late blight, but long‐term overuse of chemical fungicides may lead to environmental pollution and human health threats. Endophytes, natural resources for plant diseases control, can promote plant growth, enhance plant resistance, and secrete antifungal substances. Therefore, there is an urgent need to find some beneficial endophytes to control potato late blight. RESULTS We isolated a strain of Bacillus subtilis H17‐16 from potato healthy roots. It can significantly inhibit mycelial growth, sporangia germination and the pathogenicity of Phytophthora infestans, induce the resistance of potato to late blight, and promote potato growth. In addition, H17‐16 has the ability to produce protease, volatile compounds (VOCs) and form biofilms. After H17‐16 treatment, most of the genes involved in metabolism, virulence and drug resistance of Phytophthora infestans were down‐regulated significantly, and the genes related to ribosome biogenesis were mainly up‐regulated. Moreover, field and postharvest application of H17‐16 can effectively reduce the occurrence of potato late blight, and the combination of H17‐16 with chitosan or chemical fungicides had a better effect than single H17‐16. CONCLUSION Our results reveal that Bacillus subtilis H17‐16 has great potential as a natural fungicide for controlling potato late blight, laying a theoretical basis for its development as a biological control agent. © 2023 Society of Chemical Industry. Bacillus subtilis H17‐16 can significantly inhibit the growth, sporangia germination and pathogenicity of Phytophthora infestans, induce potato growth and resistance. Field and postharvest application of H17‐16 effectively reduced the occurrence of potato late blight.
Bibliography:Jiaomei Zhang, Xiaoqing Huang these authors contributed equally.
ObjectType-Article-1
SourceType-Scholarly Journals-1
ObjectType-Feature-2
content type line 23
ISSN:1526-498X
1526-4998
DOI:10.1002/ps.7717