Acidobacteria strains from subdivision 1 act as plant growth-promoting bacteria

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• 作者：Anna M. Kielak ; Matheus A. P. Cipriano ; Eiko E. Kuramae
• 关键词：Acidobacteria ; PGPB ; IAA ; Root biomass ; Arabidopsis thaliana
• 刊名：Archives of Microbiology
• 出版年：2016
• 出版时间：December 2016
• 年：2016
• 卷：198
• 期：10
• 页码：987-993
• 全文大小：953 KB
• 刊物类别：Biomedical and Life Sciences
• 刊物主题：Life Sciences
  Microbiology
  Microbial Ecology
  Biochemistry
  Cell Biology
  Biotechnology
  Ecology
  
• 出版者：Springer Berlin / Heidelberg
• ISSN：1432-072X
• 卷排序：198

文摘

Acidobacteria is one of the most abundant phyla in soils and has been detected in rhizosphere mainly based on cultivation-independent approaches such as 16S rRNA gene survey. Although putative interaction of Acidobacteria with plants was suggested, so far no plant–bacterial interactions were shown. Therefore, we performed several in vitro tests to evaluate Acidobacteria–plant interactions and the possible mechanisms involved in such interaction. We observed that Arabidopsis thaliana inoculated with three strains belonging to Acidobacteria subdivision 1 showed increase in biomass of roots and shoots as well as morphological changes in root system. Our results indicate that the plant hormone indole-3-acetic acid production and iron acquisition are plausibly involved in the plant and Acidobacteria interactions. Here, we confirm for the first time that Acidobacteria can actively interact with plants and act as plant growth-promoting bacteria. In addition, we show that Acidobacteria strains produce exopolysaccharide which supports the adhesion of bacteria to the root surfaces.