浙江农业学报 ›› 2025, Vol. 37 ›› Issue (12): 2525-2534.DOI: 10.3969/j.issn.1004-1524.20240757

• 植物保护 • 上一篇    下一篇

草莓内生菌的分离筛选及其功能特性

解雨佳1(), 李镇江1,2, 沙飞宇1, 张琳3, 仝雅娜4, 乔长晟1,3, 曹伟锋1,*()   

  1. 1.天津科技大学 生物工程学院,天津 300457
    2.四川百川金开生物工程有限公司,四川 成都 611130
    3.天津慧智百川生物工程有限公司,天津 300456
    4.天津市农业科学院 林业果树研究所,天津 300384
  • 收稿日期:2024-08-23 出版日期:2025-12-25 发布日期:2026-01-09
  • 作者简介:解雨佳(1998—),女,河北唐山人,硕士研究生,主要从事内生菌研究。E-mail: xyj19981126@163.com
  • 通讯作者: *曹伟锋,E-mail: weifcao@126.com

Isolation, screening, and functional characteristics of endophytes from strawberry

XIE Yujia1(), LI Zhenjiang1,2, SHA Feiyu1, ZHANG Lin3, TONG Yana4, QIAO Changsheng1,3, CAO Weifeng1,*()   

  1. 1. College of Biotechnology, Tianjin University of Science and Technology, Tianjin 300457, China
    2. Sichuan Baichuan Jinkai Biological Engineering Co., Ltd., Chengdu 611130, China
    3. Tianjin Huizhi Baichuan Biological Engineering Co., Ltd., Tianjin 300456, China
    4. The Research Institute of Forestry and Pomology, Tianjin Academy of Agricultural Sciences, Tianjin 300384, China
  • Received:2024-08-23 Online:2025-12-25 Published:2026-01-09

摘要:

为挖掘草莓内生菌的各种潜在功能,为后期开发内生菌菌剂提供新的菌种资源,以草莓品种红颜为对象,分离、筛选内生菌,采用平板法研究其促生能力,采用五点对峙法研究其对4种草莓常见病原菌[灰霉菌(Botrytis cinerea)、尖孢镰刀菌(Fusarium oxysporum)、胶孢炭疽菌(Colletotrichum gloeosporioides)、尖孢炭疽菌(Colletotrichum acutatum)]的拮抗能力,采用高通量测序分析内生菌的群落结构和多样性。结果显示,本研究共分离得到68株内生菌,其中,15株具有产吲哚乙酸的能力,48株具有产铁载体的能力,8株具有溶解无机磷的能力,23株具有溶解有机磷的能力,28株具有产纤维素酶的能力,33株具有产蛋白酶的能力,45株具有固氮的能力,47株具有解钾的能力。抑菌试验结果显示,14株内生菌对4种致病菌均表现出拮抗能力,另有6株内生菌至少对一种致病菌表现出拮抗能力。供试草莓的内生菌群在细菌门水平上主要包括变形菌门(Proteobacteria)、放线菌门(Actinobacteria),在真菌门水平上主要为子囊菌门(Ascomycota),在细菌属水平上主要包括链霉菌属(Streptomyces)、葡萄球菌属(Staphylococcus)、假单胞菌属(Pseudomonas),在真菌属水平上主要为Monographella

关键词: 草莓, 内生菌, 促生功能, 拮抗功能, 病原菌

Abstract:

To explore the various potential functions of strawberry endophytes and provide new strain resources for the subsequent development of endophytic microbial agents, the strawberry cultivar Hongyan was used as the research object to isolate and screen endophytes. The plate method was employed to determine their growth-promoting abilities, while the five-point confrontation assay was used to evaluate their antagonistic activities against four common strawberry pathogens, namely Botrytis cinerea, Fusarium oxysporum, Colletotrichum gloeosporioides and Colletotrichum acutatum. High-throughput sequencing was applied to analyze the community structure and diversity of the endophytes. The results showed that a total of 68 endophytic strains were isolated. Among them, 15 strains had the ability to produce indole-3-acetic acid (IAA), 48 strains could produce siderophores, 8 strains exhibited inorganic phosphorus solubilization capacity, 23 strains had organic phosphorus solubilization ability, 28 strains were capable of producing cellulase, 33 strains could produce protease, 45 strains possessed nitrogen fixation capacity, and 47 strains could release potassium. The antibacterial test results indicated that 14 endophytic strains showed antagonistic activity against all four pathogenic fungi, and 6 other strains exhibited antagonistic effects against at least one pathogen. At the phylum level, the endophytic bacterial community of the tested strawberry was mainly composed of Proteobacteria and Actinobacteria, while the endophytic fungal community was dominated by Ascomycota. At the genus level, the dominant bacterial genera included Streptomyces, Staphylococcus, and Pseudomonas, and the dominant fungal genus was Monographella.

Key words: strawberry, endophyte, growth-promoting function, antagonistic function, pathogen

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