PJB-2020-234
DETERMINATION OF ECOLOGICAL AND PHYSIOLOGICAL EFFECTS OF DIFFERENT KCl CONCENTRATIONSON IN SAFFLOWER VARIETIES (Carthamus tinctorius L.)
Sema LEBLEBİCİ
Abstract
Salinity, which is a significant ecological stress factor, is among the most important factors that limit product quality and yield. Safflower, which is an annual plant belonging to the genus Carthamus, has a significant potential in utilization of marginal agricultural areas for production as it has a high ability to adapt to arid regions, it is tolerant against salt stress and shows high competition against weeds. Safflower, which is among significant industrial plants due to especially the active ingredients of carthamin and carthamidin that its flowers contain, also has medicinal plant properties. This study determined the ecological and physiological changes that occurred in three different safflower varieties that were exposed to KCl stress at concentrations of 0, 50, 100 and 150 mM. It was determined that, based on increasing salt concentrations, there were decreases in the germination rate, root and shoot length, root and shoot fresh-dry weight, root and show biomass and seed vigor index, while the most significant decrease was at the concentrations of 100 and 150 mM KCl. It was observed that, among antioxidant enzymes that are known as protection mechanisms against oxidative stress, the SOD and CAT activities showed a significant increase at high salt concentrations in the Balcı and Dinçer varieties. The APX and GR activities showed a parallelism in all Safflower varieties, and they showed a significant increase based on increased concentration at applications of 100 and 150 mM KCl. Considering the ecological and physiological results, it was determined that the Safflower plant adapted to low salt concentrations. Among the three safflower varieties, the most resistant variety to salt application was Dinçer, while the most sensitive one was Remzibey. The Balcı variety was closer to the Dinçer variety in terms of its tolerance against salt stress.
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