生物技术通报 ›› 2020, Vol. 36 ›› Issue (9): 109-116.doi: 10.13560/j.cnki.biotech.bull.1985.2019-1203

• 根际微生物专题(专题主编:张瑞福 研究员) • 上一篇    下一篇

马铃薯根际产IAA芽孢杆菌的分离鉴定及促生效果研究

李培根1,2, 要雅倩1,2, 宋吉祥1, 王天琪1, 周波1,2, 王冰1,2, 林榕姗1,2   

  1. 1.山东农业大学生命科学学院,泰安 271018;
    2.山东省盐碱地植物-微生物联合修复工程技术研究中心,泰安 271018
  • 收稿日期:2019-12-11 出版日期:2020-09-26 发布日期:2020-09-30
  • 作者简介:李培根,男,硕士研究生,研究方向:资源与环境微生物;E-mail:2533803234@qq.com
  • 基金资助:
    江苏泗洪县重点科技研发计划(现代农业)项目,桃树专用功能型生物有机肥研发(L201804),生物有机肥研发(2018-1-1289)

Isolation and Identification of IAA-producing Bacillus sp on Potato Rhizosphere and Its Growth-promoting Effect

LI Pei-gen1,2, YAO Ya-qian1,2, SONG Ji-xiang1, WANG Tian-qi1, ZHOU Bo1,2, WANG Bing1,2, LIN Rong-shan1,2   

  1. 1. College of Life Sciences,Shandong Agricultural University,Tai'an 271018;
    2. Shandong Engineering Research Center of Plant-Mircrobe Restoration for Saline-alkali Land,Tai'an 271018
  • Received:2019-12-11 Published:2020-09-26 Online:2020-09-30

摘要: 从黑龙江地区马铃薯根际土壤中分离得到11株具有较好的产IAA能力的芽孢杆菌,其中对产量较高的HL379进行形态学、Biolog以及16S rDNA序列分析鉴定其种属,采用拟南芥促生实验以及马铃薯盆栽实验进行促生功能研究。经鉴定该菌株为阿耶波多氏芽孢杆菌(Bacillus aryabhattai),IAA产量为47.8 mg/L,经盆栽实验发现,马铃薯株高、鲜重、干重、根长等分别增加了13%、32%、107%、20.8%,马铃薯产量增加38%,对马铃薯的生长具有显著的促进作用。说明HL379在植物促生方面具有一定的应用潜力。

关键词: 马铃薯, 吲哚乙酸, 促生功能研究, 植物根际细菌

Abstract: Eleven Bacillus strains that have promising ability of producing IAA were isolated from the potato rhizosphere soil in Heilongjiang. The strain HL379 with high yield was identified by morphology,Biolog and 16S rDNA sequence analysis. The pot experiments of growing Arabidopsis thaliana and potato were carried out to study its growth promotion function. The strain was identified as Bacillus aryabhattai,and the yield of IAA was 47.8 mg/L. Growth experiments in the pot showed that potato plant height,fresh weight,dry weight,and root length increased by 13%,32%,107% and 20.8%,respectively,and potato yield increased by 38%,meaning that it had a significant promotion effect on potato growth. It reveals that HL379 has certain application potential in plant growth promotion.

Key words: potato, indole acetic acid, growth promotion function, plant rhizosphere bacteria