Rhizobium meliloti chromosomal loci required for suppression of exopolysaccharide mutations by lipopolysaccharide

Journal Article · Wed Oct 31 23:00:00 EST 1990 · Journal of Bacteriology; (USA)

OSTI ID:5857514

Williams, M N.V.; Brzoska, P M; Signer, E R ^[1]; Hollingsworth, R I ^[2]

---

1. Institute of Technology, Cambridge, MA (USA)
2. Michigan State Univ., East Lansing (USA)

Mutants of alfalfa symbiont Rhizobium meliloti SU47 that fail to make extracellular polysaccharide (exo mutants) induce the formation of nodules that are devoid of bacteria and consequently do not fix nitrogen. This Fix{sup {minus}} phenotype can be suppressed by an R. meliloti Rm41 gene that affects lipopolysaccharide structure. Here we describe mutations preventing suppression that map at two new chromosomal loci, lpsY and lpsX, present in both strains. Two other lps mutations isolated previously from SU47 also prevented suppression.

• OSTI ID: 5857514
• Journal Information: Journal of Bacteriology; (USA), Journal Name: Journal of Bacteriology; (USA) Vol. 172:11; ISSN JOBAA; ISSN 0021-9193
• Country of Publication: United States
• Language: English

Related Subjects

550400* -- Genetics
59 BASIC BIOLOGICAL SCIENCES
ALFALFA
BACTERIA
CARBOHYDRATES
GENE MUTATIONS
GENETIC MAPPING
INHIBITION
LEGUMINOSAE
LIPIDS
LIPOPOLYSACCHARIDES
MAGNOLIOPHYTA
MAGNOLIOPSIDA
MAPPING
MICROORGANISMS
MUTATIONS
NITROGEN FIXATION
ORGANIC COMPOUNDS
PHENOTYPE
PLANTS
POLYSACCHARIDES
RHIZOBIUM
SACCHARIDES