THE DETERMINATION OF TOTAL ANTIOXIDANT ACTIVITY, PHENOLICS AND PIGMENTS DURING VEGETATIVE AND REPRODUCTIVE PERIODS OF ONOSMA SPECIES

R. Binzet, S. Duman, H. I. Teke, A. Sivaci

Abstract: This study was carried out in order to evaluate the changes in antioxidant activity, phenolic compounds and pigments during the vegetative (April) and reproductive (May) periods of Onosma species (Onosma rascheyana and Onosma sericea). The antioxidant activity in vegetative period was higher (lowest activity) than reproductive period in O. sericea and O. rascheyana. In vegetative period, total phenolic compounds of O. rascheyana and O. sericea were lower than reproductive period. Pigments (chlorophyll a, chlorophyll b and carotenoids) in reproductive period were higher than vegetative in both O. sericea and O. rascheyana.

Keywords: antioxidant activity; Onosma; phenolics; photosynthetic pigments; physiological development stage

Date published: 2017-09-15