Variation of some biochemical characteristics of Vitis vinifera L. green parts in relation to growing height

Abstract

The purpose of the study was to evaluate and establish therelationships between some biochemical featrures of leaves collected from the top, middle and bottom of the vine stock in the phenophase of grapes tehnological mathurity. The determinations included analysis of the moisture and total dry matter, total polyphenolic compounds and peroxydase activity. The concentration of photosynthetic pigments and the ratios between them was also determinated. The varietys ana lysed were Fetească albă, Fetească Regală, Grasă de Cotnari, Tămâioasă românească and Frâncușă from Iași vineyard. The highest total polyphenolic content, was registrated in the top leaves while the middle collected leaves recorded a increased level of photosynthetic pigmentsdepending on variety and growing height.