▪ Abstract Gene amplification is a common feature of the genome of prokaryotic organisms.
In this review, we analyze different instances of gene amplification in a variety of …

The field of microbiology has traditionally shown considerable interest in the association of
bacteria with higher plant and animal life. The fundamental question that has driven this …

The second edition of this book, first published in 1991 and intended for students and
researchers, contains revised and updated material on the theory and practice of nitrogen …

In prokaryotes, lateral gene transfer across chromosomal lineages may be mediated by
plasmids, phages, transposable elements, and other accessory DNA elements. However …

Rhizobium leguminosarum bv. phaseoli CFN42 contains six plasmids (pa to pf), and pd has
been shown to be the symbiotic plasmid. To determine the participation of the other …

The stability of the genetic structure of rhizobial populations nodulating Phaseolus vulgaris
cultivated in a traditionally managed milpa plot in Mexico was studied over three …

In bacteria, niche adaptation may be determined by mobile extrachromosomal elements. A
remarkable characteristic of Rhizobium and Ensifer (Sinorhizobium) but also of …

Rhizobium spp. strains able to nodulate beans (Phaseolus vulgaris L.) were isolated from
Andalusian (Southern Spain) soils with no record of recent bean cultivation (except soil 14) …

Summary 56 isolates of Rhizobium leguminosarum biovar viciae from one field were
characterized by analysis of plasmid profile, total DNA restriction pattern and restriction …

Evolution could potentially be accelerated if an organism could selectively increase the
mutation rate of specific genes that are actively under positive selection. Recently, a …