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Biocontrol potential of volatile organic compounds produced by Streptomyces corchorusii CG-G2 to strawberry anthracnose caused by Colletotrichum gloeosporioides

文献类型: 外文期刊

作者: Li, Xiaojuan 1 ; Zhang, Lu 2 ; Zhao, Yankun 1 ; Feng, Junting 1 ; Chen, Yufeng 1 ; Li, Kai 1 ; Zhang, Miaoyi 1 ; Qi, Dengfeng 1 ; Zhou, Dengbo 1 ; Wei, Yongzan 1 ; Wang, Wei 1 ; Xie, Jianghui 1 ;

作者机构: 1.Chinese Acad Trop Agr Sci, Inst Trop Biosci & Biotechnol, Natl Key Lab Trop Crop Breeding, Haikou 571101, Peoples R China

2.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: Volatile organic compounds; Strawberry anthracnose; Biological control; Metabolomics; Flavonoids metabolism

期刊名称:FOOD CHEMISTRY ( 影响因子:8.8; 五年影响因子:8.6 )

ISSN: 0308-8146

年卷期: 2024 年 437 卷

页码:

收录情况: SCI

摘要: Colletotrichum gloeosporioides is a fungal disease of strawberry fruit. Biocontrol strategies holds tremendous promise in alleviating fruit decay. Here, 30 actinomycetes were isolated from rhizosphere soil of Calotropis gigantea. A strain labeled with CG-G2 exhibited the strongest antagonistic activity against C. gloeosporioides and was assigned as Streptomyces corchorusii. Compared to strain CG-G2 extracts, the volatile organic compounds (VOCs) had a high antifungal activity against anthracnose. These volatiles effectively inhibited mycelial growth and spore germination of C. gloeosporioides. The hyphal and conidial structure was severely destroyed. Metab-olomics analysis revealed that VOCs inhibited C. gloeosporioides via inducing flavonoids metabolism contributing to antifungal activity. Three main antagonistic compounds in VOCs were identified as methyl 2-methyl butyrate, hexanenitrile and methyl 2-Ethyl hexanoate. Especially, methyl 2-methyl butyrate demonstrated a remarkable efficacy in inhibiting fruit decay and preserving fruit quality. Hence, S. corchorusii CG-G2 will be a potential biocontrol agent for controlling anthracnose on harvested fruits.

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