The Complex Molecular Signaling Network in Microbe–Plant Interaction

  • María A. Morel
  • Susana Castro-Sowinski


Soil bacteria living around plants exert neutral, beneficial, or detrimental effects on plant growth and development. These effects are the result of signal exchange in which there is a mutual recognition of diffusible molecules produced by the plant and microbe partners. Understanding the molecular signaling network involved in microbe–plant interaction is a promising opportunity to improve crop productivity and agriculture sustainability. Many approaches have been used to decipher these molecular signals, and the results show that plants and microorganisms respond by inducing the expression of, and releasing, a mixture of molecules that includes flavonoids, phytohormones, pattern recognition receptors, nodulins, lectins, enzymes, lipo-chitooligosaccharides, exopolysaccharides, amino acids, fatty acids, vitamins, and volatiles.

This chapter reviews current knowledge of the diverse signaling pathways that are turned on when plants interact with beneficial microbes, with emphasis on bacteria belonging to the genera Rhizobium, Azospirillum, and Pseudomonas.


Arbuscular Mycorrhizal Fungus Root Hair Quorum Sense Plant Growth Promotion Plant Growth Promote Rhizobacteria 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.



 We thank Programa de Desarrollo de las Ciencias Básicas (PEDECIBA). The work of M. Morel was supported by Agencia Nacional de Investigación e Innovación (ANII). Dr. Valerie Dee revised linguistic aspects of this manuscript.


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© Springer India 2013

Authors and Affiliations

  1. 1.Laboratory of Molecular MicrobiologyClemente Estable Institute of Biological ResearchMontevideoUruguay
  2. 2.Department of Biochemistry and Molecular Biology, Faculty of ScienceUniversity of the RepublicMontevideoUruguay

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