Dekkiche S. auteur aut IRD Benguedouar A. auteur aut IRD Sbabou L. auteur aut IRD Taha K. auteur aut IRD Filali-Maltouf A. auteur aut IRD Béna Gilles auteur aut IRD text journalArticle eng text/pdf born digital access Using a local Algerian cultivar of chickpea, from 9 sites in Eastern Algeria, along a sub-humid to arid gradient, we isolated 60 nodulating isolates, among which 19 were assigned to Mesorhizobium species and 41 to Ensifer meliloti. Trapping revealed great differences among sites for their ability to induce nodules on plant, but no correlation with chemical and physical characterizations of soil samples could be found. Based on 16S rRNA gene sequences, 16S-23S IGS, recA, nodC and nifH sequences, Mesorhizobium isolates were assigned to at least 5 different species, among which one had never been described as nodulating chickpea before. The symbiotic diversity is conversely low, and shared by several species, reflecting horizontal gene transfer. The ability of Mesorhizobium genus to recombine and exchange symbiotic clusters among different species must play a great role in this ability to be associated with chickpea. The question to what extent the symbiotic species would end in this genus is discussed. specialized Chickpea algeria symbiotic bacteria Mesorhizobium ALGERIE 084 068 074 64 2 285-297 2018 0365-0340 https://www.documentation.ird.fr/hor/fdi:010071968 10.1080/03650340.2017.1346791 0365-0340 [F B010071968] https://www.documentation.ird.fr/hor/fdi:010071968 https://www.documentation.ird.fr/intranet/publi/2018/01/010071968.pdf Accès réservé (Intranet de l'IRD) IRD - Base Horizon / Pleins textes 2018-02-05 2018-02-05 fdi:010071968 fre