VINCENT Paula Andrea
congresos y reuniones científicas
Pseudomonas stutzeri MJL19, A BENEFICIAL RHIZOBACTERIUM FOR SOYBEAN IN SALINE CONDITIONS
LAMI, MARÍA JESÚS; ROSA M; VIVES-PERIS V; PRADO C; PRADO F; DE LA TORRE J; PAZ-GARCÍA EC; ESPINOSA URGEL, M; VINCENT, P.A.; DE CRISTOBAL, R.E.
Congreso; XXII REUNIÓN DE LA SOCIEDAD ESPAÑOLA DE FISIOLOGÍA VEGETAL/ XV SPANISH-PORTUGUESE CONGRESS OF PLANT PHYSIOLOGY; 2017
Saline environments cause cellular dehydration, which leads to osmotic stress and removal of water from the cytoplasm, resulting in a reduction of the cytosolic and vacuolar volumes. Salt stress often creates both ionic as well as osmotic stress in plants, resulting in growth decrease and accumulation of specific metabolites. However, the use of plant growth promoting rhizobacteria (PGPR) can improve plant growth by enhancing the resistance against various abiotic stresses. This study aimed to determine the influence of Pseudomonas stutzeri MJL19, a PGPR isolated in Argentina, on growth and physiology of soybean subjected to salinity. Changes in biomass, osmolytes accumulation (sucrose and proline), lipid peroxydation (accumulation of malondialdehyde, MDA) and abscisic acid (ABA) were measured to analyze the plant response under salinity. Results showed that seedling biomass decreased with salinity, whereas seedlings inoculated with MJL19, had a slight increase in this parameter. Inoculated seedling roots showed higher sucrose and proline content than non-inoculated ones. MDA level was higher in hypocotyls than in roots and increased under salinity with or without MJL19. Stressed seedlings had higher levels of ABA than controls, but these differences were lower in inoculated seedlings. Results suggest that inoculation with P. stutzeri MJL19 could improve the defense response to saline stress in soybean seedlings.