Root Exudates of Legume Plants and Their Involvement in Interactions with Soil Microbes

Chapter
Part of the Signaling and Communication in Plants book series (SIGCOMM, volume 12)

Abstract

Plants secrete both high- and low-molecular weight compounds from their roots, and these root exudates function not only as nutrients for soil microbes but as signal molecules in plant–microbe interactions. Legume plants establish symbiotic interactions with rhizobia and arbuscular mycorrhizal fungi to obtain several nutrients such as nitrogen and phosphate. In these interactions, flavonoids and strigolactones in root exudates serve as signal molecules to establish the symbiotic interactions. Root exudates from some legume plants also function to acidify surrounding soils to acquire phosphate. Here, we provide an overview of the functions of legume root exudates with emphasis on the interaction between legume plants and soil microbes and also on the acquisition of nutrients from surrounding soil.

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Copyright information

© Springer-Verlag Berlin Heidelberg 2012

Authors and Affiliations

  1. 1.Center for Rhizosphere BiologyColorado State UniversityFort CollinsUSA
  2. 2.Research Institute for Sustainable HumanosphereKyoto UniversityUjiJapan

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