A natriuretic peptide is formed at high levels in actinorhizal nodules of Alnus glutinosa
(English)Manuscript (preprint) (Other academic)
Plant homologues of mammalian natriuretic peptides (Plant Natriuretic Peptides, PNPs, also called γ-expansins as they represent expansins lacking the third exon/C-terminal domain) are small apoplastic proteins that have been associated with various biotic and abiotic stresses. Here, the characterization of PNP from Alnus glutinosa is described that is expressed at high levels in actinorhizal root nodules induced by nitrogen-fixing Frankia, and at very low levels during fruit development. In order to determine the function of this PNP in nodules, the cDNA was expressed in transgenic tobacco under control of the CaMV35S promoter. The results reveal a very slight increase in resistance to oxidative/nitrosative stress. Based on the occurrence of PNPs in different types of nitrogen-fixing root nodules and the oxidative/nitrosative stress these nodule types are exposed to, we hypothesize that Ag67 is involved in the response to nitric oxide.
Frankia, actinorhiza, nodulin, ectopic expression
Research subject Plant Physiology
IdentifiersURN: urn:nbn:se:su:diva-30844OAI: oai:DiVA.org:su-30844DiVA: diva2:274358