文献类型： 外文期刊

作者： Chen, Meijun ¹ ; Jia, Fan ¹ ; Chen, Shan ¹ ; Zheng, Yang ³ ; Hu, Yan ³ ; Liu, Weina ¹ ; Liu, Changyun ¹ ; Sun, Xianchao ¹ ; Lu, Jinwei ³ ; Chen, Guokang ¹ ; Ma, Guanhua ¹ ;

作者机构： 1.Southwest Univ, Coll Plant Protect, Chongqing Key Lab Plant Dis Biol, Chongqing 400716, Peoples R China

2.State Adm Cultural Heritage, Key Sci Res Base Pest & Mold Control Heritage Coll, Chongqing China Three Gorges Museum, Chongqing, Peoples R China

3.Chongqing Acad Agr Sci, Inst Vegetable & Flower Res, Chongqing 400055, Peoples R China

关键词： peach brown rot; Monilinia fructicola; biocontrol; Streptomyces virginiae; XDS1-5

期刊名称：JOURNAL OF THE SCIENCE OF FOOD AND AGRICULTURE （ 影响因子：3.3； 五年影响因子：4.0 ）

ISSN： 0022-5142

年卷期： 2024 年

页码：

收录情况： SCI

摘要： BACKGROUND: Peach brown rot, caused by the pathogen Monilinia fructicola, represents a significant postharvest infectious disease affecting peach fruit. This disease is responsible for a substantial increase in fruit decay rates, leading to significant economic losses, often exceeding 50%. Currently, there is a growing interest in identifying biocontrol agents to mitigate peach brown rot, with a predominant interest in Bacillus species. RESULTS: In this investigation, we isolated 410 isolates of actinomycetes from non-farmland ecosystem soil samples. Subsequently, 27 isolates exhibiting superior inhibitory capabilities were selected. Among these, strain XDS1-5 demonstrated the most robust fungistatic effect against brown rot disease, achieving an 80% inhibition rate in vitro and a 66% inhibition rate in vivo. XDS1-5 was identified as belonging to the Streptomyces virginiae species. Furthermore, a fermentation filtrate of XDS1-5 exhibited the ability to metabolize 34.21% of the tested carbon sources and 7.37% of the tested nitrogen sources. Particularly noteworthy was its capacity to disrupt the cell membrane structure directly, leading to increased cell membrane permeability and cytoplasmic leakage. Additionally, our investigation indicated that indoline, a metabolite produced by XDS1-5, played a pivotal role in inhibiting the growth of M. fructicola. CONCLUSION: In summary, our study has identified a biocontrol actinomycete, XDS1-5, with the potential to effectively inhibit postharvest brown rot disease in peaches. This finding holds great significance for the biological control of peach brown rot, offering promising prospects for mitigating the economic losses associated with this devastating disease. (c) 2024 Society of Chemical Industry.