Journal Article

Community- and Genome-Based Views of Plant-Associated Bacteria: Plant–Bacterial Interactions in Soybean and Rice

Seishi Ikeda, Takashi Okubo, Mizue Anda, Hideo Nakashita, Michiko Yasuda, Shusei Sato, Takakazu Kaneko, Satoshi Tabata, Shima Eda, Ayumi Momiyama, Kimihiro Terasawa, Hisayuki Mitsui and Kiwamu Minamisawa

in Plant and Cell Physiology

Published on behalf of Japanese Society of Plant Physiologists

Volume 51, issue 9, pages 1398-1410
Published in print September 2010 | ISSN: 0032-0781
Published online August 2010 | e-ISSN: 1471-9053 | DOI: http://dx.doi.org/10.1093/pcp/pcq119
Community- and Genome-Based Views of Plant-Associated Bacteria: Plant–Bacterial Interactions in Soybean and Rice

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  • Biochemistry
  • Molecular and Cell Biology
  • Plant Sciences and Forestry

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Diverse microorganisms are living as endophytes in plant tissues and as epiphytes on plant surfaces in nature. Questions about driving forces shaping the microbial community associated with plants remain unanswered. Because legumes developed systems to attain endosymbioses with rhizobia as well as mycorrhizae during their evolution, the above questions can be addressed using legume mutants relevant to genes for symbiosis. Analytical methods for the microbial community have recently been advanced by enrichment procedures of plant-associated microbes and culture-independent analyses targeting the small subunit of rRNA in microbial ecology. In this review, we first deal with interdisciplinary works on the global diversity of bacteria associated with field-grown soybeans with different nodulation genotypes and nitrogen application. A subpopulation of Proteobacteria in aerial parts of soybean shoots was likely to be regulated through both the autoregulation system for plant–rhizobium symbiosis and the nitrogen signaling pathway, suggesting that legumes accommodate a taxonomically characteristic microbial community through unknown plant–microbe communications. In addition to the community views, we then show multiphasic analysis of a beneficial rice endophyte for comparative bacterial genomics and plant responses. The significance and perspectives of community- and genome-based approaches are discussed to achieve a better understanding of plant–microbe interactions.

Keywords: Autoregulation; Endophyte; Epiphyte; Legume; Plant-associated microbes; Soybean

Journal Article.  6711 words.  Illustrated.

Subjects: Biochemistry ; Molecular and Cell Biology ; Plant Sciences and Forestry

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