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Exploration of Intrinsic Microbial Community Modulators in the Rice Endosphere Indicates a Key Role of Distinct Bacterial Taxa Across Different Cultivars

Authors
  • Wang, Pei1, 2
  • Kong, Xiao3, 4
  • Chen, Hongsong5
  • Xiao, Youlun2
  • Liu, Huijun6
  • Li, Xiaojuan2
  • Zhang, Zhuo1, 2
  • Tan, Xinqiu2
  • Wang, Diandong7
  • Jin, Decai4, 8
  • Deng, Ye4, 8
  • Cernava, Tomislav9
  • 1 College of Plant Protection, Hunan Agricultural University, Changsha , (China)
  • 2 Hunan Plant Protection Institute, Hunan Academy of Agricultural Sciences, Changsha , (China)
  • 3 School of Public Health, Qingdao University, Qingdao , (China)
  • 4 Key Laboratory of Environmental Biotechnology, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing , (China)
  • 5 Guangxi Key Laboratory for Biology of Crop Diseases and Insect Pests, Institute of Plant Protection, Guangxi Academy of Agricultural Sciences, Nanning , (China)
  • 6 Beijing Key Laboratory of Detection and Control of Spoilage Organisms and Pesticide Residues in Agricultural Products, Beijing University of Agriculture, Beijing , (China)
  • 7 College of Life Science and Technology, Yangtze Normal University, Chongqing , (China)
  • 8 College of Resources and Environment, University of Chinese Academy of Sciences, Beijing , (China)
  • 9 Institute of Environmental Biotechnology, Graz University of Technology, Graz , (Austria)
Type
Published Article
Journal
Frontiers in Microbiology
Publisher
Frontiers Media SA
Publication Date
Feb 16, 2021
Volume
12
Identifiers
DOI: 10.3389/fmicb.2021.629852
PMID: 33664718
PMCID: PMC7920960
Source
PubMed Central
Keywords
License
Unknown

Abstract

Microbial communities associated with the plant phyllosphere and endosphere can have both beneficial as well as detrimental effects on their hosts. There is an ongoing debate to which extend the phyllosphere and endosphere microbiome assembly is controlled by the host plant how pronounced cultivar effects are. We investigated the bacterial and fungal communities from the phyllosphere and endosphere of 10 different rice cultivars grown under identical environmental conditions in the frame of a targeted approach to identify drivers of community assembly. The results indicated that the endophytic bacterial communities were clearly separated into two groups. The α-diversity and microbial network complexity within Group I were significantly lower than in Group II. Moreover, the genera Nocardioides , Microvirga , and Gaiella were significantly more abundant in Group II and only present in the interaction networks of this group. These three genera were significantly correlated with α- and β-diversity of the endophytic bacterial community and thus identified as major drivers of the endosphere community. We have identified keystone taxa that shape endophytic bacterial communities of different rice cultivars. Our overall findings provide new insights into plant-microbe interactions, and may contribute to targeted improvements of rice varieties in the future.

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