Caracterización y actividad PGPR en microsimbiontes nativos de maní

BRESSANO, M., MORENO, D., TAURIAN, T., CASTRO, S., FABRA, A.

Villa General Belgrano, Córdoba

Jornada; XIV Jornadas Científicas de la Sociedad de Biología de Córdoba; 2003

Sociedad Biología de Córdoba

Resumen The increase in the yield of some leguminous plants inoculated with selected rhizobia strains has been associated with the rhizobia ability to act as plant growth promoting rhizobacteria (PGPR). Thus, the genotypic characterization, the symbiotic performance determination as well as the identification of strains with PGPR properties is recommended. Three of the six isolates studied were fast growers. No relationship were found between growth rate and tolerance to adverse conditions. Fifty percent of the isolates was able to solubilize inorganic phosphate or produce siderophores and 67% showed antagonism against plant pathogenic fungi. Isolate NLH32 showed all the PGPR activities tested. The fingerprint profiles obtained with primers E1/E2 showed a great heterogeneity between the isolates.