Salinity and Drought Induced Antioxidant Responses in Different Cultivars of Safflower (Carthamus Tinctorius, L).

Salinity and Drought Induced Antioxidant Responses in Different Cultivars of Safflower (Carthamus Tinctorius, L).
Curr Pharm Biotechnol. 2013 Dec 26;
Authors: Javed S, Bukhari SA, Bukhari IH, Meraj M, Mahmood S, Farooq M
Abstract
Six cultivars of safflower which were (PI-387820, PI-251978, PI-170274, PI-387821, PI-386174 and Thori-78) grown in net house of NIAB under salinity (10 ds m-1) and drought (60% field capacity) conditions and compared to their oxidative damage and antioxidative responses. Plant samples (leaves) were collected for the determination of malonidialdehyde (MDA), antioxidative enzymes (catalase, ascorbate peroxidase, glutathione reductase, and peroxidase), proline, and photosynthetic pigments. Salinity and drought decreased the chlorophyll a and b contents but a decrease in chlorophyll a and b was less in safflower variety (THORI-78) which could be a useful marker for selecting a stress tolerant variety. Both stresses considerable increases the accumulation of proline in PI-251978, PI-170274, PI-387821, PI-386174 and THORI-78 varieties of safflower whereas the proline accumulation did not appear to be an essential part of the protection mechanism against salinity and drought in variety PI-387820. Enzyme activity measurements revealed that THORI-78 can tolerate salinity and drought stress well by increasing the activity of catalase and APX enzymes whereas variety PI-386174 showed increased activity of glutathione reductase e...

Source: Current Pharmaceutical Biotechnology - December 26, 2013 Category: Biotechnology Authors: Javed S, Bukhari SA, Bukhari IH, Meraj M, Mahmood S, Farooq M Tags: Curr Pharm Biotechnol Source Type: research