IBR   13079
INSTITUTO DE BIOLOGIA MOLECULAR Y CELULAR DE ROSARIO
Unidad Ejecutora - UE
congresos y reuniones científicas
Título:
PLANT NATRIURETIC PEPTIDES IMPROVE PLANT RESISTANCE DURING BIOTIC STRESS
Autor/es:
FICARRA F; OTTADO J; GRANDELLIS C; GOTTIG N; GARAVAGLIA BS
Lugar:
Cordoba
Reunión:
Congreso; LII Reunión Anual Sociedad Argentina de Investigación en Bioquímica y Biología Molecular; 2016
Institución organizadora:
Sociedad Argentina de Investigación en Bioquímica y Biología Molecular
Resumen:
Plant natriuretic peptides (PNPs) are extracellular, systemically mobilemolecules that are involved in the modulation of salt and waterhomeostasis and AtPNP-A from Arabidopsis thaliana has beenextensively studied. Distinctively, the bacterial pathogen of citrusplants, Xanthomonas citri subsp. citri (Xcc) contains a PNP-like gene(XacPNP). Both peptides, AtPNP-A and XacPNP induce similarphysiological responses when applied on plant tissue, includingstomatal opening and photosynthetic efficiency improvement. A.thaliana-Pseudomonas syringae pv. tomato (Pst) pathosystem and itsgenetic resources allowed us to analyze the role of XacPNP andAtPNP-A in A. thaliana during infection. To this aim, A. thalianatransgenic lines were generated overexpressing XacPNP and AtPNP-A,and RNA interference lines silencing endogenous AtPNP-A were alsoobtained. Overexpressing PNPs lines showed enhanced resistance toPst, while PNP-deficient plants were more susceptible. Moreover, pretreatmentof A. thaliana leaves with XacPNP before Pst infectionresulted in increased resistance evidenced by higher remnantchlorophyll, lower pathogen survival and induction of defenseassociated genes. Our results state a role for PNPs during plant bioticstress improving plant performance under stressful conditions.