Possible role of glutamine synthetase in the NO signaling response in root nodules by contributing to the antioxidant defenses.

ABSTRACT: Nitric oxide (NO) is emerging as an important regulatory player in the Rhizobium-legume symbiosis. The occurrence of NO during several steps of the symbiotic interaction suggests an important, but yet unknown, signaling role of this molecule for root nodule formation and functioning. The identification of the molecular targets of NO is key for the assembly of the signal transduction cascade that will ultimately help to unravel NO function. We have recently shown that the key nitrogen assimilatory enzyme glutamine synthetase (GS) is a molecular target of NO in root nodules of Medicago truncatula, being post-translationally regulated by tyrosine nitration in relation to nitrogen fixation. In functional nodules of M. truncatula NO formation has been located in the bacteroid containing cells o

SUBMITTER: Silva L 

PROVIDER: S-EPMC3777134 | biostudies-literature | 2013

REPOSITORIES: biostudies-literature