The role of the nodI and nodJ genes in the transport of Nod metabolites in Rhizobium etli
1996; Elsevier BV; Volume: 173; Issue: 2 Linguagem: Inglês
10.1016/0378-1119(96)00166-7
ISSN1879-0038
AutoresLuis Cárdenas, Jimena Domı́nguez, Olivia Santana, Carmen Quinto,
Tópico(s)Agronomic Practices and Intercropping Systems
ResumoA kinetic analysis of secretion of lipo-chitin oligosaccharides (LCO) produced by Rhizobium etli (Re) wild-type (wt) strain and derivatives carrying disrupted nodI or nodJ genes was performed. LCO were detected in the growth media of the wt strain as early as 1 h after nod gene induction. In contrast, strains carrying nodI or nodJ mutations secreted less LCO, and accumulated LCO metabolites intracellularly after 4 h of induction. These Re mutants presented a delayed nodulation phenotype and a reduction in the maximum number of nodules formed in Phaseolus vulgaris roots.
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