TY - JOUR
T1 - Rhizobial extrachromosomal replicon variability, stability and expression in natural niches
AU - López-Guerrero, Martha G.
AU - Ormeño-Orrillo, Ernesto
AU - Acosta, José Luis
AU - Mendoza-Vargas, Alfredo
AU - Rogel, Marco A.
AU - Ramírez, Miguel Angel
AU - Rosenblueth, Mónica
AU - Martínez-Romero, Julio
AU - Martínez-Romero, Esperanza
N1 - Funding Information:
To PAPIIT (UNAM) grants IN200709 and IN205412 . Martha López-Guerrero was a Ph.D. student at the Programa de Doctorado en Ciencias Biomédicas and had a Consejo Nacional de Ciencia y Tecnología (CONACyT) fellowship. Illumina Sequencing was performed at the Unidad Universitaria de Secuenciación Masiva de DNA (USMDNA) of Universidad Nacional Autónoma de México (UNAM). To Dr. M. Dunn for critically reading the ms. Appendix A
PY - 2012/11
Y1 - 2012/11
N2 - 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.
AB - 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.
KW - Ensifer
KW - Plasmid instability
KW - Plasmids
KW - Rhizobium
KW - Sinorhizobium
KW - Symbiotic plasmids
UR - http://www.scopus.com/inward/record.url?scp=84865626440&partnerID=8YFLogxK
U2 - 10.1016/j.plasmid.2012.07.002
DO - 10.1016/j.plasmid.2012.07.002
M3 - Artículo de revisión
C2 - 22813963
AN - SCOPUS:84865626440
SN - 0147-619X
VL - 68
SP - 149
EP - 158
JO - Plasmid
JF - Plasmid
IS - 3
ER -