Resumé
Des mutants non mobiles (mob−) et non chimiotactiques (chem−) deRhizobium meliloti Ve 26 ont été isolés afin de connaître l'importance de ces caractères dans la nodulation de la luzerne en milieu liquide et en milieu solide. En milieu liquide les mutants produisent un nombre de nodules équivalent à ceux des souches parentales; par contre, en milieu solide (perlite, sol) l'étude réalisée dans une ‘miniserre’ expérimentale adaptée montre que les caractères de mobilité et de chimiotactisme favorisent la nodulation et augmentent notablement le pouvoir compétitif des souches qui les possèdent.
Summary
Non mobile (mob−) and non chemotactic (chem−) mutants ofRhizobium meliloti Ve 26 have been isolated so that the importance of these characters in lucerne nodulation in liquid medium and in solid medium might be known. In liquid medium the mutants developed a number of nodules equal to those obtained from parental strains; on the opposite, in solid medium (perlite, soil) the study in an adapted experimental mini-greenhouse showed that the mobility and chemotactic characters improved the nodulation and greatly increased the competitive capacity of the strains that possessed them.
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Ochin, D., Tailliez, R. & Guillaume, J.B. Etude expérimentale de la symbiose entre la luzerne etRhizobium meliloti. Mise au point d'une miniserre. Plant Soil 84, 29–35 (1985). https://doi.org/10.1007/BF02197864
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DOI: https://doi.org/10.1007/BF02197864