ABA Y GA3 REGULAN LA SÍNTESIS DE METABOLITOS PRIMARIOS Y SECUNDARIOS EN PLANTAS DE VID (VITIS VINIFERA L.) CV MALBEC

PONTIN, M; FONTANA, A; PICCOLI, P; BERTAZZA, G; MURCIA, G; BARALDI, R

Corrientes

Congreso; XXXI Reunión Argentina de Fisiología Vegetal; 2016

Sociedad Argentina de Fisiología Vegetal

Plants are able to synthesize a large number of organic compounds. Among them, primary metabolites are known to participate in plant growth and development, whereas secondary metabolites are mostly involved in defense and other facultative processes. In grapevine, one of the major fruit crops in the world, little is known about the effect of plant growth regulators (PGRs), ABA and GA3 (extensively used in table grapes), on the synthesis of primary and secondary metabolites in wine grapes. Accordingly, the aim of this study is to assess and characterize primary and secondary metabolites in leaves, berries and roots of grapevine plants cv. Malbec at veraison, and their shift after ABA and GA3 aerial sprayings. Metabolic profiling was conducted using GC-MS, GC-FID and HPLC-MWD. The obtained results showed that ABA applications elicited the synthesis of mono- and sesquiterpenes in all the assessed tissues, L-proline, acidic amino acids and anthocyanins in leaves. Applications with GA3 elicited the synthesis of L-proline in berries, and mono- and sesquiterpenes in all the tissues. However, the treatment with GA3 seemed to block the polyphenols synthesis, mainly in berries. In conclusion, ABA and GA3 applications to grapevine plants cv. Malbec influenced the synthesis of primary and secondary metabolites.