Streptomyces vinaceus Mediating the Mechanism of Chinese Orchid Stomatal Closure to Enhance Resistance to Anthracnose
文献类型： 外文期刊
作者： Yao, Jinai 1 ; Huang, Peng 1 ; Zhang, Jie 1 ; Hou, Xiangyu 2 ; Yu, Deyi 1 ;
作者机构： 1.Fujian Acad Agr Sci, Inst Plant Protect, Fujian Engn Res Ctr Green Pest Management, Fujian Key Lab Monitoring & Integrated Management, Fuzhou 350013, Peoples R China
2.Fuzhou Inst Technol, Sch Comp & Informat Sci, Fuzhou 350506, Peoples R China
关键词：
orchid;
期刊名称：AGRONOMY-BASEL （ 影响因子：3.4； 五年影响因子：3.8 ）
ISSN：
年卷期： 2025 年 15 卷 6 期
页码：
收录情况： SCI
摘要： Streptomyces vinaceus strain SVFJ-07 is a biocontrol bacterium employed to control anthracnose disease caused by Colletotrichum gloeosporioides in Chinese orchids. This study investigated the mechanism of strain SVFJ-07-induced stomatal immunity-related closure in preventing the infection of anthracnose disease. After the foliar application of strain SVFJ-07, we analyzed the differential patterns of stomatal opening in Chinese orchids and measured the hormone levels of abscisic acid (ABA) and salicylic acid (SA). RNA sequencing (RNA-seq) was utilized to examine the differential expression of genes involved in SA and ABA signal transduction and disease resistance genes, which were induced by strain SVFJ-07. The results demonstrated that strain SVFJ-07 inhibited the infection of pathogens by inducing stomatal closure. Compared with the control group, the foliar application of strain SVFJ-07 significantly reduced stomatal length, width, and aperture. Furthermore, orchid plants treated with strain SVFJ-07 and infected with C. gloeosporioides exhibited elevated levels of endogenous ABA and SA, indicating that strain SVFJ-07 enhanced stomatal immunity and disease resistance in these plants. The transcriptome analysis revealed the upregulation of genes associated with stomatal immunity, particularly those involved in plant-pathogen interactions, peroxisome metabolism, plant hormone signaling, and mitogen-activated protein kinase (MAPK) signaling pathways. These findings confirmed that the induction of SVFJ-07 promoted stomatal closure to resist the infection of C. gloeosporioides and induced complex transcriptome-wide changes. Further investigation of the differentially expressed genes enhanced our understanding of the resistance mechanisms induced by S. vinaceus strain SVFJ-07.
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