Russian Journal of Plant Physiology

, Volume 48, Issue 3, pp 364–369 | Cite as

The Role of Wheat Germ Agglutinin in Plant–Bacteria Interactions: A Hypothesis and the Evidence in Its Support

  • L. P. Antonyuk
  • V. V. Ignatov
Article

Abstract

Wheat plants are known to develop the associative symbiosis with the rhizobacterium Azospirillum brasilense.We studied the interaction of a lectin, wheat germ agglutinin (WGA), which is also found in wheat roots, with A. brasilense, strain sp245. When added to the azospirillum culture to the final concentration of 10–8to 10–9M, WGA enhanced IAA production, dinitrogen fixation, and ammonium excretion by bacterial cells. WGA also promoted the synthesis of proteins, both new and those already present in bacterial cells. The hypothesis that WGA is a signal molecule rerouting the bacterial metabolism in the direction favorable for the growth and development of the host plant has been put forward. It is suggested that signal properties of WGA are the basis for one of the functions of this lectin and essential for the effective associative symbiosis.

Azospirillum brasilense associative symbiosis wheat germ agglutinin 

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Copyright information

© MAIK “Nauka/Interperiodica” 2001

Authors and Affiliations

  • L. P. Antonyuk
    • 1
  • V. V. Ignatov
    • 1
  1. 1.Institute of Biochemistry and Physiology of Plants and MicroorganismsRussian Academy of SciencesSaratovRussia

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