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园艺学报 ›› 2026, Vol. 53 ›› Issue (1): 229-243.doi: 10.16420/j.issn.0513-353x.2024-0954

• 植物保护 • 上一篇    下一篇

枯草芽孢杆菌J6-1对桃褐腐病菌的抑菌活性分析

李晓倩1,2, 王卓妮1, 史冰柯1, 王丽1, 周贝贝1, 涂洪涛1,2, 袁洪波1,2,*(), 侯珲1,2,*()   

  1. 1 中国农业科学院郑州果树研究所, 郑州 450009
    2 中国农业科学院中原研究中心, 河南新乡 453004
  • 收稿日期:2025-04-15 修回日期:2025-09-26 出版日期:2026-01-25 发布日期:2026-01-26
  • 通讯作者:
    *E-mail:
  • 基金资助:
    中国农业科学院郑州果树研究所科研业务费专项(ZGS202313); 河南省重点研发专项(221111111800); 中国农业科学院科技创新工程项目(CAAS-ASTIP-2021-RIP-05)

Analysis of Antagonistic Activity of Bacillus subtilis J6-1 Against Monilinia fructicola

LI Xiaoqian1,2, WANG Zhuoni1, SHI Bingke1, WANG Li1, ZHOU Beibei1, TU Hongtao1,2, YUAN Hongbo1,2,*(), HOU Hui1,2,*()   

  1. 1 Zhengzhou Fruit Research InstituteChinese Academy of Agricultural Sciences, Zhengzhou 450009, China
    2 Zhongyuan Research CenterChinese Academy of Agricultural Sciences,Xinxiang, Henan 453004, China
  • Received:2025-04-15 Revised:2025-09-26 Published:2026-01-25 Online:2026-01-26

摘要:

为防治由果生链核盘菌(Monilinia fructicola)引起的桃褐腐病,采用平皿对峙法筛选出拮抗细菌枯草芽孢杆菌J6-1,并分析其对桃褐腐病的防治效果和拮抗机制。结果显示,菌株J6-1对桃褐腐病菌的抑制率达到74%,且具有广谱抑菌活性。菌株J6-1能产生蛋白酶、纤维素酶、葡聚糖酶等水解酶,其上清液可以破坏菌丝细胞膜,诱导桃果实病程相关基因(PpPR1)的表达。2%、4%、6%、8%的J6-1上清液对桃褐腐病菌菌丝生长的抑制率分别为64.3%、70.2%、79.75%、85.43%,抑制能力随浓度升高而逐渐增强,且2%的J6-1上清液能引起桃褐腐病菌菌丝变细、消解,原生质外渗,菌丝细胞膜受损。J6-1粗提物中差异幅度最大的前10个差异代谢物主要是氨基酸及其衍生物。桃果实接种M. fructicola 3 d进行菌株J6-1菌悬液、上清液与粗提物处理,抑制效果分别为73.81%、82.48%、92.66%。表明菌株J6-1对桃褐腐病具有良好的防治效果。

关键词: 桃, 褐腐病, 枯草芽孢杆菌, 生物防治, 抑制效果, 病程相关基因

Abstract:

In order to effectively control peach brown rot caused by Monilinia fructicola,the antagonistic bacteria Bacillus subtilis J6-1 was screened by plate confrontation method,and the prevention effect and antagonistic mechanism were analyzed. The results showed that strain J6-1 exhibited an inhibition rate of 74% against M. fructicola and displayed broad-spectrum antifungal activity. The strain J6-1 could produce hydrolases such as protease,cellulase,and glucanase,and its supernatant could destroy the cell membrane of the mycelium and induce the expression of pathogenesis-related genes(PpPR1)in peach fruit. Treatment with 2%,4%,6% and 8% of J6-1 supernatant resulted in mycelial growth inhibition rates of 64.3%,70.2%,79.75% and 85.43%,respectively. The inhibition ability enhanced gradually with the increase of the concentration,and 2% J6-1 supernatant could cause the mycelia of M. fructicola to become thinner and digested,the protoplasts exuded,and cell membrane integrity loss. The top 10 differentially abundant metabolites of J6-1 crude extract,primarily consisting of amino acids and their derivatives. In vivo assays,the inhibition rates of strain J6-1 suspension,supernatant and crude extract on the mycelial growth of M. fructicola were 73.81%,82.48% and 92.66% at 3 days post inoculation,respectively. These findings indicate that B. subtilis J6-1 has good control effect on peach brown rot.

Key words: peach, peach brown rot, Bacillus subtilis, biological control, inhibition effect, pathogenesis-related genes