浙江农业科学 ›› 2025, Vol. 66 ›› Issue (5): 1072-1077.DOI: 10.16178/j.issn.0528-9017.20240070

• 瓜果类 • 上一篇    下一篇

秋葵根际微生物及内生菌的分离与鉴定

欧阳恺(), 谭思怡, 张伟松, 支庆庆()   

  1. 仲恺农业工程学院 农业与生物学院,广东 广州 510225
  • 收稿日期:2024-01-22 出版日期:2025-05-11 发布日期:2025-05-20
  • 通讯作者: 支庆庆(1990—),女,吉林吉林人,讲师,博士,研究方向为微生物代谢与分子遗传,E-mail:zhiqingqing1990@163.com
  • 作者简介:欧阳恺(1998—),男,广东惠州人,本科,研究方向为微生物次级代谢调控,E-mail: ouyangkai_kk@163.com
  • 基金资助:
    广东省农村科技特派员项目(KTP20210368);广州市科技计划项目(2023A04J1431)

Isolation and identification of rhizosphere microorganisms and endophytes in okra

OUYANG Kai(), TAN Siyi, ZHANG Weisong, ZHI Qingqing()   

  1. College of Agriculture and Biology,Zhongkai University of Agriculture and Engineering, Guangzhou 510225, Guangdong
  • Received:2024-01-22 Online:2025-05-11 Published:2025-05-20

摘要: 为研究秋葵根际微生物及内生菌的群落组成,采用稀释平板涂布法对秋葵根际土壤、根组织及茎组织中的微生物进行分离纯化,并采用形态特征、生理生化实验结合分子生物学鉴定的方法对分离出的菌株进行了鉴定。结果表明,秋葵根际土壤中微生物种类丰富,共分离到18种微生物,其中细菌数量最多,真菌次之,放线菌数量最少。根组织和茎组织中共分离到9种微生物,且与根际土壤所共有,表明秋葵根部及茎部内生菌与根际土壤微生物具有种属同源性。部分分离到的微生物如枯草芽孢杆菌(Bacillus subtilis)、蒙氏假单胞菌(Pseudomonas monteilii)和普萨根瘤菌(Rhizobium pusense)具有固氮、解磷、产生生长素等功能,属益生菌。本实验为深入研究秋葵微生物分布及其在秋葵生长发育中的作用奠定了基础。

关键词: 秋葵, 根际微生物, 内生菌, 分离鉴定

Abstract:

In order to investigate the community composition of rhizosphere microorganisms and endophytes in okra, we used the spread plate method to isolate and purify the microorganisms in the rhizosphere soil, root tissue, and stem tissue of okra. The isolated strains were identified through morphological characteristics observation, physiological and biochemical tests combined with molecular biological identification. The results showed that the microbial species from rhizosphere soil of okra were abundant. A total of 18 species were identified, and the number of bacterial were the highest, followed by fungi, and the number of actinomycetes was the lowest. A total of 9 species were isolated and identified from root tissue and stem tissue of okra, and these microorganisms were common shared between okra tissue and rhizosphere soil, which indicated the species homology between the endophytes in the root tissue and stem tissue of okra and the microorganisms in the rhizosphere soil. Several isolated strains including Bacillus subtilis, Pseudomonas monteilii and Rhizobium pusense are able to fix nitrogen, dissolve phosphorus, and produce auxin that can benefit plant growth. Our study provides basis for deep study of distribution of microorganisms and their roles in the growth and development of okra.

Key words: okra, rhizosphere microorganism, endophyte, isolation and identification

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