INVESTIGADORES
CASTAGNARO Atilio Pedro
artículos
Título:
The ellagitannin HeT induces electrolyte leakage, calcium influx and the accumulation of nitric oxide and hydrogen peroxide in strawberry
Autor/es:
MARTOS, GG; MANANÍ, A; FILIPPONE, MP; CASTAGNARO, AP; DÍAZ RICCI, JC
Revista:
PLANT PHYSIOLOGY AND BIOCHEMISTRY
Editorial:
ELSEVIER FRANCE-EDITIONS SCIENTIFIQUES MEDICALES ELSEVIER
Referencias:
Lugar: Paris; Año: 2017
ISSN:
0981-9428
Resumen:
HeT (1-0-galloyl-2,3; 4,6-bis-hexahydroxydiphenoyl-β-D-glucopyranose) is a penta-esterified ellagitannin obtainedfrom strawberry leaves. Previous studies have shown that foliar application of HeT prior to inoculationwith a virulent pathogen increases the resistance toward Colletotrichum acutatum in strawberry plants and toXanthomonas citri subsp. citri in lemon plants. In this work we report that HeT induces an immediate leak ofelectrolytes, the hyperpolarization of the cellular membrane, a rapid Ca2+ influx to the cytoplasm during thefirst few seconds, which in turn modulates the accumulation of nitric oxide 5 min after treatment. At longertimes, a biphasic accumulation of H2O2 with peaks at 2 and 5 h post treatment could be observed. In addition,HeT elicited the increase of alternative oxidase capacity during the first 12 h post treatment.