Journal of Bacteriology 2005-08-01

De novo alanine synthesis by bacteroids of Mesorhizobium loti is not required for nitrogen transfer in the determinate nodules of Lotus corniculatus.

Shalini Kumar, Alexandre Bourdès, Philip Poole

Index: J. Bacteriol. 187(15) , 5493-5, (2005)

Full Text: HTML

Abstract

Deletion of both alanine dehydrogenase genes (aldA) in Mesorhizobium loti resulted in the loss of AldA enzyme activity from cultured bacteria and bacteroids but had no effect on the symbiotic performance of Lotus corniculatus plants. Thus, neither indeterminate pea nodules nor determinate L. corniculatus nodules export alanine as the sole nitrogen secretion product.