Improving grape phenolic content and wine chromatic characteristics through the use of two different elicitors: methyl jasmonate versus benzothiadiazole.
Benzothiadiazole (BTH) and methyl jasmonate (MeJ) have been described as exogenous elicitors of some plant defense compounds, polyphenols among them. The objective of this study was to determine whether the application of BTH or MeJ to grape clusters at the beginning of the ripening process had any effect on the accumulation of the main flavonoid compounds in grapes (anthocyanins, flavonols, and flavanols) and the technological significance of these treatments in the resulting wines. The results obtained after a 2 year experiment indicated that both treatments increased the anthocyanin, flavonol, and proanthocyanidin content of grapes. The wines obtained from the treated grapes showed higher color intensity and total phenolic content than the wines made from control grapes. The exogenous application of these elicitors, as a complement to fungicide treatments, could be an interesting strategy for vine protection, increasing, at the same time, the phenolic content of the grapes and the resulting wines.
Food Science and Technology Deparment, Faculty of Veterinary Science, University of Murcia, Murcia, Spain.
Yolanda
Y
Ruiz-García
Inmaculada
I
Romero-Cascales
Rocio
R
Gil-Muñoz
Jose Ignacio
JI
Fernández-Fernández
Jose María
JM
López-Roca
Encarna
E
Gómez-Plaza
D000085:Acetates / Q000494:pharmacology*; D003517:Cyclopentanes / Q000494:pharmacology*; D005260:Female; D006801:Humans; D008297:Male; D054883:Oxylipins / Q000494:pharmacology*; D010636:Phenols / Q000032:analysis*; D013649:Taste; D013830:Thiadiazoles / Q000494:pharmacology*; D027843:Vitis / Q000737:chemistry* / Q000187:drug effects*; D014920:Wine / Q000032:analysis*
D000085:Acetates; D003517:Cyclopentanes; D054883:Oxylipins; D010636:Phenols; D013830:Thiadiazoles; C015700:benzo-1,2,3-thiadiazole; C072239:methyl jasmonate