%0 Journal Article
%9 ACL : Articles dans des revues avec comité de lecture non répertoriées par l'AERES
%A Giraud, Eric
%A Hannibal, Laure
%A Fardoux, Joël
%A Verméglio, A.
%A Dreyfus, Bernard
%T Effect of Bradyrhizobium photosynthesis on stem nodulation of Aeschynomene sensitiva
%D 2000
%L fdi:010024136
%G ENG
%J Proceedings of the National Academy of Sciences
%@ 0027-8424
%K LEGUMINEUSE ; NODULE CAULINAIRE ; BACTERIE ; SYMBIOSE ; FIXATION BIOLOGIQUE DE L'AZOTE ; PHOTOSYNTHESE ; CROISSANCE ; ANALYSE GENETIQUE ; METHODE D'ANALYSE ; TECHNIQUE PCR ; ETUDE EXPERIMENTALE ; ETUDE COMPARATIVE
%N 26
%P 14795-14800
%R 10.1073/pnas.250484097
%U https://www.documentation.ird.fr/hor/fdi:010024136
%> https://horizon.documentation.ird.fr/exl-doc/pleins_textes/pleins_textes_7/b_fdi_57-58/010024136.pdf
%V 97
%W Horizon (IRD)
%X Some leguminous species of the genus #Aeschynomene$ are specifically stem-nodulated by photosynthetic bradyrhizobia. To study the effect of bacterial photosynthesis during symbiosis, we generated a photosynthesis-negative mutant of the #Bradyrhizobium$ sp. strain ORS278 symbiont of #Aeschynomene sensitiva$. The presence of a functional photosynthetic unit in bacterioids and the high expression of the photosynthetic genes observed in stem nodules demonstrate that the bacteria are photosynthetically active during stem symbiosis. Stem inoculation by the photosynthetic mutant gave a 50% decrease in stem-nodule number, which reduced nitrogen fixation activity and plant growth in the same proportion. These results indicate an important role of bacterial photosynthesis in the efficiency of stem nodulation. (Résumé d'auteur)
%$ 084SYMBIO01