Antioxidative Potentials as a Protective Mechanism in Catharanthus roseus (L.) G.Don. Plants under Salinity Stress

Authors : Cheruth Abdul JALEEL, Ragupathi GOPI, Paramasivam MANIVANNAN, Rajaram PANNEERSELVAM

Pages : 245-251

View : 14 | Download : 7

Publication Date : 0000-00-00

Article Type : Research Paper

Abstract :Antioxidant responses were analysed in Catharanthus roseus insert ignore into journalissuearticles values(L.); G.Don. under 0, 50 and 100 mM NaCl in order to investigate the plant´s protective mechanisms against long-term salt-induced oxidative stress. The NaCl treatments were repeated in 4 different stages of growth, i.e. 30, 45, 60 and 75 days after sowing insert ignore into journalissuearticles values(DAS);. The plants were uprooted randomly 90 DAS and the non-enzymatic and enzymatic antioxidant potentials were analysed. High salinity caused a decrease in reduced glutathione insert ignore into journalissuearticles values(GSH); and an enhancement in total ascorbate insert ignore into journalissuearticles values(AA); content and the antioxidant enzyme and ascorbate peroxidase insert ignore into journalissuearticles values(APX, EC 1.11.1.11); activities. Moreover, salinity induced a significant decline in superoxide dismutase insert ignore into journalissuearticles values(SOD, EC 1.15.1.1); and peroxidase insert ignore into journalissuearticles values(POX, EC 1.11.1.7); activities. The changes found in catalase insert ignore into journalissuearticles values(CAT, EC 1.11.1.6); activities may be of great importance in the H2O2 detoxification mechanism under oxidative stress.
Keywords : Antioxidants, antioxidant enzyme, salinity, Catharanthus roseus