INVESTIGADORES
DIAZ RICCI Juan Carlos
artículos
Título:
The ellagitannin HeT induces electrolyte leakage, calcium influx and the accumulation of nitric oxide and hydrogen peroxide in strawberry
Autor/es:
MARTOS, GUSTAVO G.; MAMANI, ALICIA; FILIPPONE, MA. PAULA; CASTAGNARO, ATILIO P.; DIAZ RICCI, JUAN C.
Revista:
PLANT PHYSIOLOGY AND BIOCHEMISTRY
Editorial:
ELSEVIER FRANCE-EDITIONS SCIENTIFIQUES MEDICALES ELSEVIER
Referencias:
Año: 2018 vol. 123 p. 400 - 405
ISSN:
0981-9428
Resumen:
HeT(1-0-galloyl-2,3;4,6-bis-hexahydroxydiphenoyl-?Ò-D-glucopyranose) is a penta-esterified ellagitannin obtained from strawberry leaves. Previous studies have shown that foliar application of HeT prior to inoculation with a virulent pathogenincreasesthe resistance toward Colletotrichum acutatum in strawberry plants and to Xanthomonas citri subsp. citri in lemon plants. In this work we report that HeT induces an immediate leak of electrolytes, the hyperpolarization of the cellular membrane, a rapidCa2+influx to the cytoplasm during the first few seconds, which in turn modulates the accumulation of nitric oxide 5 min after treatment. At longer times, a biphasic accumulation of H2O2 with peaks at 2 and 5 hours post treatment could be observed. In addition, HeT elicited the increase of alternative oxidase capacity during the first 12 hours post-treatment.