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Front. Plant Sci. | doi: 10.3389/fpls.2019.01496

Molecular weapons contribute to intracellular rhizobia accommodation within legume host cell

 Camille Syska1,  Renaud Brouquisse2, Geneviève Alloing3,  Nicolas Pauly1, 4, Pierre Frendo1, Marc Bosseno1, 5, Laurence Dupont1 and  Alexandre Boscari2*
  • 1Université Côte d'Azur, France
  • 2INRA Centre Provence-Alpes-Côte d'Azur, France
  • 3UMR7254 Institut Sophia Agrobiotech (ISA), France
  • 4Laboratoire des Interactions Plantes-Microorganismes, INRA, CNRS, Université de Toulouse, France
  • 5Université Côte d'Azur, France

The interaction between legumes and bacteria of rhizobia type results in a beneficial symbiotic relationship characterized by the formation of new root organs, called nodules. Within these nodules the bacteria, released in plant cells, differentiate into bacteroids and fix atmospheric nitrogen through the nitrogenase activity. This mutualistic interaction has evolved sophisticated signaling networks to allow rhizobia entry, colonization, bacteroid differentiation and persistence in nodules. Nodule cysteine rich (NCR) peptides, reactive oxygen species (ROS), reactive nitrogen species (RNS), and toxin–antitoxin (TA) modules produced by the host plants or bacterial microsymbionts have a major role in the control of the symbiotic interaction. These molecules described as weapons in pathogenic interactions have evolved to participate to the intracellular bacteroid accommodation by escaping control of plant innate immunity and adapt the functioning of the nitrogen-fixation to environmental signalling cues.

Keywords: Key-words: legumes, Symbiosis, Bacteroid, Reactive Oxygen Species, Nitric Oxide, Nitrogen Fixation, nodule-specific cysteine rich peptides, toxin-antitoxin Manuscript length: …2959 words;

Received: 08 Aug 2019; Accepted: 28 Oct 2019.

Copyright: © 2019 Syska, Brouquisse, Alloing, Pauly, Frendo, Bosseno, Dupont and Boscari. This is an open-access article distributed under the terms of the Creative Commons Attribution License (CC BY). The use, distribution or reproduction in other forums is permitted, provided the original author(s) and the copyright owner(s) are credited and that the original publication in this journal is cited, in accordance with accepted academic practice. No use, distribution or reproduction is permitted which does not comply with these terms.

* Correspondence: Dr. Alexandre Boscari, INRA Centre Provence-Alpes-Côte d'Azur, Avignon, 06903, PACA, France, alexandre.boscari@inra.fr