Rhizobial extrachromosomal replicon variability, stability and expression in natural niches
Por:
Lopez-Guerrero, MG, Ormeno-Orrillo, E, Acosta, JL, Mendoza-Vargas, A, Rogel, MA, Ramirez, MA, Rosenblueth, M, Martinez-Romero, J, Martinez-Romero, E
Publicada:
1 nov 2012
Categoría:
Molecular Biology
Resumen:
In bacteria, niche adaptation may be determined by mobile extrachromosomal elements. A remarkable characteristic of Rhizobium and Ensifer (Sinorhizobium) but also of Agrobacterium species is that almost half of the genome is contained in several large extrachromosomal replicons (ERs). They encode a plethora of functions, some of them required for bacterial survival, niche adaptation, plasmid transfer or stability. In spite of this, plasmid loss is common in rhizobia upon subculturing. Rhizobial gene-expression studies in plant rhizospheres with novel results from transcriptomic analysis of Rhizobium phaseoli in maize and Phaseolus vulgaris roots highlight the role of ERs in natural niches and allowed the identification of common extrachromosomal genes expressed in association with plant rootlets and the replicons involved. (C) 2012 Elsevier Inc. All rights reserved.
Filiaciones:
Lopez-Guerrero, MG:
UNAM, Ctr Ciencias Genom, Cuernavaca, Morelos, Mexico
Ormeno-Orrillo, E:
UNAM, Ctr Ciencias Genom, Cuernavaca, Morelos, Mexico
Acosta, JL:
UNAM, Ctr Ciencias Genom, Cuernavaca, Morelos, Mexico
Mendoza-Vargas, A:
UNAM, Inst Biotecnol, Cuernavaca, Morelos, Mexico
Rogel, MA:
UNAM, Ctr Ciencias Genom, Cuernavaca, Morelos, Mexico
Ramirez, MA:
UNAM, Ctr Ciencias Genom, Cuernavaca, Morelos, Mexico
Rosenblueth, M:
UNAM, Ctr Ciencias Genom, Cuernavaca, Morelos, Mexico
Martinez-Romero, J:
UNAM, Ctr Ciencias Genom, Cuernavaca, Morelos, Mexico
Martinez-Romero, E:
UNAM, Ctr Ciencias Genom, Cuernavaca, Morelos, Mexico
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