IBAM   22618
INSTITUTO DE BIOLOGIA AGRICOLA DE MENDOZA
Unidad Ejecutora - UE
artículos
Título:
1-MCP AND ABA ON CABERNET SAUVIGNON ENHANCE BERRIES PER BUNCH, BUT ADDITIONALLY ABA INDUCES POLIPHENOL IMPROVEMENTS
Autor/es:
QUIROGA, A.M.; DEIS, L.; CAVAGNARO, J.B.; BOTTINI R.
Revista:
BIOCELL
Editorial:
INST HISTOL EMBRIOL-CONICET
Referencias:
Año: 2010 vol. 34 p. 62 - 62
ISSN:
0327-9545
Resumen:
Stimulate berry set is an agronomical tool for improve yield on
viticulture. Previously we showed that foliar sprays of abscisic acid
(ABA) enhance yield in Vitis vinifera L. cv. Cabernet Sauvignon
increasing the number of berries per bunch, without affecting the
anthocyanin contents and the poliphenol index. In Vitis it has been
informed that it produces an increase of endogen ethylene on preveraison
stages. The hypothesis of the present work is that ABA
decrease fruit abscission because it inhibits synthesis and/or action
of ethylene. The objective was to evaluate the effect of ABA and 1-
metilciclopropene (1-MCP, inhibitor of ethylene action, SmartFresh-
Rhom&Hass Co.) on yield and composition of berries in Cabernet
Sauvignon. The assay was established on a vineyard in Mendoza,
Argentine. 1-MCP (100ppm) was applied in two frequencies: one
only application in bloom (MCP1) and six weekly applications since
bloom (MCP 6); ABA (250 ppm) it was sprayed weekly since bloom
until harvest (ABA). MCP 6 and ABA treatments significantly enhance
the number of berries per bunch, even so MCP 6 treatment
significantly improved yield. 1-MCP treatments did not affect the
composition of berries considering the poliphenol and anthocyanin
contents, but ABA shows significantly improvements of these
metabolites at harvest, suggesting that the hormone have additionally
effects besides the inhibition of synthesis and/or action of ethylene.