生物技术通报 ›› 2023, Vol. 39 ›› Issue (9): 213-224.doi: 10.13560/j.cnki.biotech.bull.1985.2022-1457

• 研究报告 • 上一篇    下一篇

枯草芽孢杆菌Ya-1对辣椒枯萎病的防治及其对根际真菌群落的影响

赵志祥1(), 王殿东2, 周亚林3, 王培4, 严婉荣1, 严蓓5, 罗路云2(), 张卓4()   

  1. 1.海南省农业科学院植物保护研究所,海南省农业科学院农产品质量安全与标准研究中心,海南省植物病虫害防控重点实验室,海口 571100
    2.长江师范学院现代农业与生物工程学院,重庆 408100
    3.麻阳县农业农村局植保植检站,怀化 419400
    4.湖南省农业科学院植物保护研究所,园艺作物病虫害治理湖南省重点实验室,长沙 410125
    5.湖南农业大学植物保护学院,长沙 410128
  • 收稿日期:2022-11-28 出版日期:2023-09-26 发布日期:2023-10-24
  • 通讯作者: 罗路云,男,博士,讲师,研究方向:植物病理学;E-mail: luoluyun1992@163.com
    张卓,男,博士,副研究员,研究方向:植物保护;E-mail: lionkingno.1@163.com
  • 作者简介:赵志祥,男,博士,副研究员,研究方向:植物病害综合防治;E-mail: zhaozhixiang0207@126.com
  • 基金资助:
    海南省自然科学基金创新研究团队项目(2019CXTD403);海南省财政科技计划资助(SQKY2022-004);热带果蔬重大病虫害安全防控创新团队(HAAS2023TDYD12);湖南省教育厅科学研究项目(20C0958)

Control of Pepper Fusarium Wilt by Bacillus subtilis Ya-1 and Its Effect on Rhizosphere Fungal Microbial Community

ZHAO Zhi-xiang1(), WANG Dian-dong2, ZHOU Ya-lin3, WANG Pei4, YAN Wan-rong1, YAN Bei5, LUO Lu-yun2(), ZHANG Zhuo4()   

  1. 1. Plant Protection Institute of Hainan Academy of Agricultural Sciences, Research Center for the Quality Safety and Standards of Agricultural Products in Hainan Academy of Agricultural Sciences, Hainan Key Laboratory for Control of Plant Diseases and Insect Pests, Haikou 571100
    2. School of Advanced Agriculture and Bioengineering, Yangtze Normal University, Chongqing 408100
    3. Plant Protection and Inspection Station of Agricultural and Rural Bureau of Mayang County, Huaihua 419400
    4. Key Laboratory of Pest Management of Horticultural Crop of Hunan Province, Institute of Plant Protection, Hunan Academy of Agricultural Sciences, Changsha 410125
    5. College of Plant Protection, Hunan Agricultural University, Changsha 410128
  • Received:2022-11-28 Published:2023-09-26 Online:2023-10-24

摘要:

探究生防菌枯草芽孢杆菌Ya-1对辣椒枯萎病的防治效果,及对辣椒受尖孢镰刀菌侵染后根际真菌群落和多样性的影响。以枯草芽孢杆菌Ya-1为接种菌,探究了枯草芽孢杆菌Ya-1对辣椒枯萎病的防治效果,并通过高通量测序研究了接种前,接种后10 d,20 d时受尖孢镰刀菌侵染后辣椒根际真菌群落变化。与FOC处理(C)相比,Ya-1+FOC(D)在第10天和第20天的相对防治效果分别为77.93%和77.26%。同时接种枯草芽孢杆菌Ya-1和辣椒枯萎病菌组真菌α多样性在10 d和20 d时真菌香农指数均高于接种辣椒枯萎病菌组。在进行处理后真菌群落组成发生了显著变化,同一时间点处理组和对照组真菌群落具有显著差异,接种辣椒枯萎病菌组和同时接种辣椒枯萎病菌和枯草芽孢杆菌Ya-1组也具有显著差异(P < 0.05)。各处理土壤优势真菌种群分别为子囊菌门、接合菌门、担子菌门。在10 d和20 d,接种病原菌(OTU_1)相对丰度在接种辣椒枯萎病原菌组和同时接种辣椒枯萎病菌组和枯草芽孢杆菌Ya-1组间具有显著差异,相比较接种辣椒枯萎病原菌组,OTU_1相对丰度降低,被孢霉菌(Mortierella)的相对丰度升高。相比较对照组,接种辣椒枯萎病菌处理后连接数减少,而在加入枯草芽孢杆菌Ya-1处理后,正连接数降低。枯草芽孢杆菌Ya-1处理对辣椒枯萎病有较好的防治效果,同时它也改变了接种病原菌辣椒根际真菌群落多样性和结构,降低了真菌群落的复杂度和根际土壤中病原菌的丰度。

关键词: 枯草芽孢杆菌, 辣椒枯萎病, 微生物群落, 辣椒, 根际, 真菌

Abstract:

This work aims to investigate the control effects of the biocontrol bacterium Bacillus subtilis Ya-1 on pepper Fusarium wilt and its effect on rhizosphere soil fungal community and diversity after pepper is infected by Fusarium oxysporum. B. subtilis Ya-1 was used as inoculum to investigate its control effect on pepper Fusarium wilt, and high-throughput sequencing was used to study the changes of rhizosphere soil fungal community by F. oxysporum infection between before inoculation and at 10 d and 20 d after inoculation. Compared with FOC treatment(C), the control effects of Ya-1+FOC(D)at day 10 and day 20 were 77.93% and 77.26%, respectively. The fungal α diversity of B. subtilis Ya-1 and F. oxysporum capsicum groups was higher than that of F. oxysporum group at day 10 and day 20. The composition of fungal community changed significantly after treatment. At the same time, the fungal community of the treatment group and the control group were significantly different, and the fungal community of the FOC and Ya-1+FOC treatment were also significantly different(P< 0.05). The dominant fungal populations in all treatments were Ascomycota, Zygomycota and Basidiomycota. At day 10 and day 20, the relative abundance of inoculated pathogens(OTU_1)was significantly different between FOC and Ya-1+FOC treatment. The total relative abundance of Mortierella increased and OTU_1 decreased at day 10 and day 20, respectively. Compared with the control group, the number of nodes decreased after inoculation with Fusarium wilt, while the number of positive junctions decreased after treated with B. subtilis Ya-1. B. subtilis Ya-1 treatment had a promising control effect on pepper Fusarium wilt, while it also changed the diversity and structure of rhizosphere fungal community and reduced the complexity of fungal community and abundance of pathogenic bacteria in rhizosphere soil.

Key words: Bacillus subtilis, pepper Fusarium wilt, microbial community, pepper, rhizo sphere, fungi