Research conducted during the dormant period in grapevine

Abstract

Vine resistance over the winter is influenced by the maturation of the shoots on the one hand, and the genetic resistance of cultivated plants, on the other hand. A big problem is the intensity of extreme values of climate factors. Although they were considered incidental in recent years they have become common. Due the excessive heating of the air in winter, often producing strong annealing, negative values occur leading to loss of viability buds (Dobreva et al., 2006). Among the carbohydrates, starch is the most important reserve substance of string, and the percentage that is in the string, the end of the growing influence plant resistance to low temperatures in winter conditions. Starch content values close to normal (3.6%) were recorded in most varieties analyzed, except Fetească albă in Dealul Bujorului vineyard cultivated and grown cultivar Riesling italian in Dealul Bujorului vineyards and Iasi, which starch content was a maximum, showing that the enzymatic hydrolysis was less pronounced.