Publisher Summary This chapter describes the experimental application of a vector system
for Rhizobium that enables efficient transposon mutagenesis, site-specific insertion of …

To determine the potential for bacteriophage-mediated gene transfer in the marine
environment, we established transduction systems by using marine phage host isolates …

Rhizobium meliloti produces lipochitooligosaccharide nodulation NodRm factors that are
required for nodulation of legume hosts. NodRm factors are O-acetylated and N-acylated by …

The symbiosis between Rhizobium and legumes is highly specific. For example, FL meliloti
elicits the formation of root nodules on alfalfa and not on vetch. We recently reported that R …

We report the discovery of two genes from Rhizobium meliloti, fixL and fixJ, which are
positive regulators of symbiotic expression of diverse nitrogen fixation (nif and fix) genes. nif …

General transduction by phage phi M12 in Rhizobium meliloti SU47 and its derivatives is
described. Cotransduction and selection for Tn5 insertions which are closely linked to …

During the symbiosis between the bacterium Rhizobium meliloti and plants such as alfalfa,
the bacteria elicit the formation of nodules on the roots of host plants. The bacteria infect the …

Rhizobium meliloti trc genes controlling the catabolism of trigonelline, a plant secondary
metabolite often abundant in legumes, are closely linked to nif-nod genes on the symbiotic …

Nitrogen fixation genes are shown to undergo a complex positive and negative regulation in
Rhizobium meliloti. Activation of fixN by fixLJ is shown to require a third regulatory gene …

Large icosahedral viruses that infect bacteria represent an extreme of the coevolution of
capsids and the genomes they accommodate. One subset of these large viruses is the …