ACTIVITATEA ANTIOXIDANTĂ A SUBSTANŢELOR DIN MUGURII ARBORILOR STEJARULUI PUFOS (QUERCUS PUBESCENS WILLD.) CARE CRESC ÎN DIFERITE CONDIŢII STAŢIONALE

Gheorghe FLORENŢĂ, Petru CUZA Universitatea de Stat din Moldova

Abstract

THE ANTIOXIDANT ACTIVITY OF PUBESCENT OAK TREE BUDS (QUERCUS PUBESCENS WILLD.) WHICH GROW UNDER DIFFERENT STATIONARY CONDITIONS 

It was determined the summary activity of oxidases, catalases and reducing substances of extracts from pubescent oak shoots taken in spring from trees growing in different stationary conditions in the southern part of the Republic of Moldova. In the extracts, the tendency to increase the overall capacity of oxygen use due to the reductive potential of the phenolic substances and the activity of the oxidases in trees growing southwards is clearly manifested, which corresponds to the gradient of increasing the spring temperature in the north-south direction. This trend also manifested itself in the catalase activity, but less pronounced. In apical buds, in spring, the changes in the components that determine the oxidoreductive potential are manifested earlier, compared to those in lateral buds. This acceleration may be a reason of the early removal of dormancy apical buds comparative with the lateral buds. 

Keywords: stationary conditions, pubescent oak, trees, buds, antioxidant substances.