Isolation of acid tolerant peanut (Arachis hypogaea) rhizobia from soils of Central Argentina

TAURIAN, T., AGUILAR, O.M., FABRA, A.

Foz de Iguazu, Paraná, Brasil

Congreso; 12th International Congress on Nitrogen Fixation; 1999

Universidad Federal de Paraná, Brasil

Abstract Soil acidity may significantly reduce the symbiotic nitrogen fixation limiting Rhizobium survival and persistence in soils and reducing nodulation. Approximately 63% of the soil samples had pH belows 6.5. A 70% of the isolates showed the 390 bp band of nifD-PCR and 93.5% of them were fast grower. We observed that there were no relationship between soil pH and the acid tolerance of the rhizobia obtained.