@article{fdi:010041491, title = {{R}ole of methylotrophy during symbiosis between {M}ethylobacterium nodulans and {C}rotalaria podocarpa}, author = {{J}ourand, {P}hilippe and {R}enier, {A}deline and {R}apior, {S}. and {M}iana de {F}aria, {S}. and {P}rin, {Y}ves and {G}allana, {A}. and {G}iraud, {E}ric and {D}reyfus, {B}ernard}, editor = {}, language = {{ENG}}, abstract = {{S}ome rare leguminous plants of the genus {C}rotalaria are specifically nodulated by the methylotrophic bacterium {M}ethylobacterium nodulans. {I}n this study, the expression and role of bacterial methylotrophy were investigated during symbiosis between {M}. nodulans, strain {ORS} 2060({T}), and its host legume, {C}rotalaria podocarpa. {U}sing lac{Z} fusion to the mxa{F} gene, we showed that the methylotroph genes are expressed in the root nodules, suggesting methylotrophic activity during symbiosis. {I}n addition, loss of the bacterial methylotrophic function significantly affected plant development. {I}ndeed, inoculation of {M}. nodulans nonmethylotroph mutants in {C}. podocarpa decreased the total root nodule number per plant up to 60%, decreased the whole-plant nitrogen fixation capacity up to 42%, and reduced the total dry plant biomass up to 46% compared with the wild-type strain. {I}n contrast, inoculation of the legume {C}. podocarpa with nonmethylotrophic mutants complemented with functional mxa genes restored the symbiotic wild phenotype. {T}hese results demonstrate the key role of methylotrophy during symbiosis between {M}. nodulans and {C}. podocarpa.}, keywords = {methanol}, booktitle = {}, journal = {{M}olecular {P}lant {M}icrobe {I}nteractions}, volume = {18}, numero = {10}, pages = {1061--1068}, ISSN = {0894-0282}, year = {2005}, DOI = {10.1094/{MPMI}-18-1061}, URL = {https://www.documentation.ird.fr/hor/fdi:010041491}, }