生物技术通报 ›› 2025, Vol. 41 ›› Issue (5): 300-309.doi: 10.13560/j.cnki.biotech.bull.1985.2024-1076

• 研究报告 • 上一篇    

一株高产吲哚乙酸的Bacillus cereus YT2-1C的鉴定及促生作用

张慧1(), 卢文才1(), 王冬1, 刘倩1,2, 马连杰1   

  1. 1.重庆市农业科学院农业资源与环境研究所,重庆 401329
    2.重庆师范大学生命科学学院 重庆市特色作物资源工程技术研究中心,重庆 400000
  • 收稿日期:2024-11-06 出版日期:2025-05-26 发布日期:2025-06-05
  • 通讯作者: 卢文才,男,博士,副研究员,研究方向 :农药毒理学及科学应用;E-mail: 253953014@qq.com
  • 作者简介:张慧,女,硕士,助理研究员,研究方向 :肥效微生物和生防微生物开发利用;E-mail: 1501380987@qq.com
  • 基金资助:
    重庆市财政专项项目(KYLX20240500081);重庆市自然基金项目(CSTB2022NSCQ-MSX0508)

Identification of Bacillus cereus YT2-1C with High Indoleacetic Acid Yield and Its Growth-promoting Effect

ZHANG Hui1(), LU Wen-cai1(), WANG Dong1, LIU Qian1,2, MA Lian-jie1   

  1. 1.Institute of Agricultural Resources and Environment, Chongqing Academy of Agricultural Sciences, Chongqing 401329
    2.College of Life Sciences/Chongqing Engineering and Technology Research Center of Characteristic Crop Resources, Chongqing Normal University, Chongqing 400000
  • Received:2024-11-06 Published:2025-05-26 Online:2025-06-05

摘要:

目的 分析高产吲哚乙酸的YT2-1C菌株促生抑菌潜力,为其后续开发利用提供基础。 方法 通过菌株形态特征、16S rRNA和31个看家基因比对结果对菌株进行鉴定,定量测定菌株IAA的产量,分析菌株在产铁载体、溶磷、解钾、产蛋白酶、固氮和抑菌方面的潜力。进一步通过育苗和田间试验验证菌株的促生效果,并从基因组水平初步分析了菌株与促生相关的功能基因。 结果 YT2-1C菌株鉴定为蜡样芽胞杆菌(Bacillus cereus),该菌株IAA产量高达193 μg/mL,具有产铁载体、溶磷、产蛋白酶和抑菌的能力。育苗试验结果表明,接种YT2-1C菌株的基质,显著增加黄瓜、辣椒和番茄的株高、叶绿素、茎粗和鲜重;黄瓜移栽田间后,仍有较好的促生作用。全基因组测序分析表明YT2-1C菌株具有54个与促生相关的基因,5个非核糖体肽合成相关的基因。 结论 蜡样芽胞杆菌YT2-1C是一株具有促生防病功能的菌株,对黄瓜、辣椒和番茄有显著的促生作用,含有多个与促生防病相关基因,为其微生物菌剂的研制奠定了基础。

关键词: 促生菌, 蜡样芽胞杆菌, 菌株YT2-1C, IAA, 育苗基质, 全基因组测序

Abstract:

Objective The growth promotion and bacteriostatic potential of strain YT2-1C with high yield of indoleacetic acid was analyzed to provide a basis for its subsequent development and utilization. Method The strain was identified by morphological characteristics, 16S rRNA and 31 house-keeping genes. The IAA yield of strain was quantitatively determined. The potential of the strain in iron production, phosphorus solubilization, potassium solubilization, protease production, nitrogen fixation and bacteriostasis were analyzed. The growth-promoting effect of the strain was further verified by seedling breeding and field experiments. The functional genes related to growth-promoting were preliminarily analyzed from the genome level. Result The strain was identified as Bacillus cereus. The IAA yield of this strain reached 193 μg/ml. It had the ability of producing iron carrier, dissolving phosphorus, producing protease, and inhibiting bacteria. The results from breeding experiment showed that the plant height, chlorophyll, stem diameter and fresh weight of cucumber, pepper and tomato significantly increased by inoculation of YT2-1C strain. There was still good growth-promoting effect after cucumber plants transplanted to the field. Whole genome sequencing analysis showed that strain YT2-1C had 54 genes related to growth promotion and 5 genes related to non-ribosomal peptide synthesis. Conclusion Bacillus cereus YT2-1C is a strain that has the function of promoting growth and preventing disease. It has significant growth-promoting effect on cucumber, pepper and tomato, and contains many genes related to growth-promoting and disease-preventing, which lays a foundation for the development of its microbial microbial agent.

Key words: growth-promoting bacteria, Bacillus cereus, strain YT2-1C, IAA, seedling substrate, whole genome sequencing