Potential Biological Control of Endophytic Streptomyces sp. 5-4 Against Fusarium Wilt of Banana Caused by Fusarium oxysporum f. sp. cubense Tropical Race 4
文献类型： 外文期刊
作者： Yun, Tianyan 1 ; Jing, Tao 2 ; Zhou, Dengbo 1 ; Zhang, Miaoyi 1 ; Zhao, Yankun 1 ; Li, Kai 1 ; Zang, Xiaoping 2 ; Zhang, Lu 3 ; Xie, Jianghui 1 ; Wang, Wei 1 ;
作者机构： 1.Chinese Acad Trop Agr Sci CATAS, Hainan Inst Trop Agr Resources, Key Lab Biol & Genet Resources Trop Crops, Inst Trop Biosci & Biotechnol,Minist Agr, Haikou 571101, Hainan, Peoples R China
2.Chinese Acad Trop Agr Sci, Haikou Expt Stn, Haikou 571101, Hainan, Peoples R China
3.Hainan Normal Univ, Coll Life Sci, Minist Educ,Key Lab Ecol Trop Isl, Key Lab Trop Anim & Plant Ecol Hainan Prov, Haikou 571158, Hainan, Peoples R China
关键词： antifungal mechanism; biocontrol; defense genes; endophytic; Fusarium wilt of banana; Streptomyces
期刊名称：PHYTOPATHOLOGY （ 影响因子：4.01； 五年影响因子：4.457 ）
ISSN： 0031-949X
年卷期： 2022 年 112 卷 9 期
页码：
收录情况： SCI
摘要： Fusarium wilt of banana caused by Fusarium oxysporum f. sp. cubense tropical race 4 (Foc TR4) is one of the most disastrous fungal diseases. Biological control is a promising strategy for controlling Fusarium wilt of banana. To explore endophytic actinomycetes as biocontrol resources against Foc TR4, antagonistic strains were isolated from different tissues of medicinal plants. Here, a total of 144 actinomycetes were isolated and belonged to Nonomuraea, Kitasatospora, and Streptomyces. Forty-three isolates exhibited antifungal activities against Foc TR4. The strain labeled with 5-4 isolated from roots of Piper austrosinense had a broad-spectrum antifungal activity by the production of chitinase and beta-1,3-glucanase and was identified as Streptomyces hygroscopicus subsp. hygroscopicus 5-4. Furthermore, disease index of banana wilt was significantly reduced by application of strain 5-4 in comparison with application of Foc TR4 alone. Exogenous application of strain 5-4 increased the expression levels of defense genes such as (PAL), peroxidase (POD), pathogenesis-related protein 1 (PR-1), hydrolytic enzymes (beta-1,3-glucanase), lysin motif receptor kinase 1 (LYK-1), and mitogen-activated protein kinase 1 (MPK-1). The antifungal mechanism assay demonstrated that extracts of strain 5-4 inhibited spore gemination and hyphal growth of Foc TR4, and caused abnormally swollen, deformity, and rupture of Foc TR4 hypha. Thus, S. hygroscopicus subsp. hygroscopicus 5-4 could be used as a potential biological agent for controlling Fusarium wilt of banana.
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