Changes of phenolic compounds in Carignan merithallus (Vitis vinifera L.) during bud dormancy and end of dormancy phase: correlation with rhizogenesis

Abstract

The aim of the present study is to address the type of correlation that may exist between phe- nolic compounds and vine rhizogenetic poten- tial by analyzing some phenolic compounds in the Carignan merithallus. Phenolic compounds were analyzed by HPLC in the young shoots (or merithallus) of Carignan vine (*Vitis vinifera* L.) and we established a correlation between the studied compounds and the rhizogenetic po- tential of shoots during the phases of bud dor- mancy and end of dormancy, taking into ac- count the position effect on shoots. This work was carried out for the first time on this type of vine. Among the studied phenolic compounds, we observed a negative correlation between coumarin and rhizogenetic potential of Carignan vine. In contrast, positive correlations were found with naringin and syringic acid. Obtained results confirmed the fact that the action of phenolic compounds is complex and might be qualified as cofactors that interact with auxin on rhizogenesis. [27148] (Auth. abstract) %Z En %+ %^