Resumé
A partir de la souche deR. meliloti Ve 26 mobile et chimiotactique, un mutant non mobile (mob−) et un mutant hyper-mobile (mob+) ont été isolés. L'importance du rôle de la mobilité dans les phénomènes d'infection et de nodulation lors d'inoculations mixtes réalisées en miniserre expérimentale, est montrée: le mutant Ve 26 mob+ forme 86% et 48% de nodules respectivement quand il est inoculé en mélange avec le mutant Ve 26 mob− ou avec la souche 2011 (non mobile par rapport au mutant Ve 26 mob+).
L'inoculation mixte avec le mutant Ve 26 mob− et la souche 2011 deR. meliloti, en utilisant différents rapports de concentrations, a permis de montrer qu'il existe entre ces souches un effet antagoniste pour l'infection.
Summary
Non mobile (mob−) and hypermobile (mob+) mutants were isolated fromR. meliloti strain Ve 26. The mobility ofR. meliloti was found to play an important role in its infectivity and nodulation. When Ve 26 mob+ mutant was mixed with each of Ve 26 mob− mutant and 2011 strain (non mobile comparing with Ve 26 mob+ mutant) in mini-greenhouse, 86% and 48% of nodules were respectively formed by the former strain. An antagonist phenomenon was observed between Ve 26 mob− mutant and 2011 strain when the cultures of the two strains were mixed at different concentrations.
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El-Haloui, N.E., Ochin, D. & Tailliez, R. Compétitivité pour l'infection entre souches deRhizobium meliloti: Role de la mobilité. Plant Soil 95, 337–344 (1986). https://doi.org/10.1007/BF02374614
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DOI: https://doi.org/10.1007/BF02374614