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Signals in the Underground: Microbial Signaling and Plant Productivity

  • Chapter
Molecular Mechanisms of Plant and Microbe Coexistence

Part of the book series: Soil Biology ((SOILBIOL,volume 15))

Green plants are the vehicle by which virtually all energy enters the terrestrial biosphere. The rhizosphere is the first place where other organisms have a chronic access to this energy source and therefore an area of intense biological activity. Plants exude about 40% of photosynthates into the rhizosphere which makes it energy rich (Lynch and Whipps 1991). Due to the availability of substrates for metabolism, the rhizosphere is able to support large populations of microbes such as bacteria, actinomyctes, fungi, protozoa, algae, and viruses, etc. These rhizosphere inhabiting microorganisms compete for water, nutrients and space and sometimes improve their competitiveness by developing an intimate association with the plant. The rhizosphere can also be a battlefield among these microorganisms, with continuous competition and hostility among its inhabitants. The victors sometimes affect plant growth and development. However, it is becoming increasingly clear that establishment of the association between rhizobacteria and plants depends upon an exchange of signal molecules and it is during this initial signal exchange that plants and bacteria sometimes accept or reject each other.

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  1. Department of Plant Science, McGill University, Macdonald Campus, 21,111 Lakeshore Road, Ste Anne-de-Bellevue, Que., Canada, H9X 3V9

    Fazli Mabood & Donald L. Smith

  2. Division of Applied Bioscience and Biotechnology, College of Agriculture and Life Science, Chonnam National University, Gwangju, 500-757, South Korea

    Woo Jin Jung

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  1. National Botanical Research Institute, Rana Pratap Marg, Lucknow, 226001, India

    Chandra Shekhar Nautiyal

  2. Département de phytologie Pavillon Charles-Eugène Marchand, Université Laval, 1030, avenue de la Médecine, Québec (Québec), G1V 0A6, Canada

    Patrice Dion

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Mabood, F., Jung, W.J., Smith, D.L. (2008). Signals in the Underground: Microbial Signaling and Plant Productivity. In: Nautiyal, C.S., Dion, P. (eds) Molecular Mechanisms of Plant and Microbe Coexistence. Soil Biology, vol 15. Springer, Berlin, Heidelberg. https://doi.org/10.1007/978-3-540-75575-3_12

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