Effect of Salinity Stress on Antioxidant Defense System of Niger (Guizotia abyssinica Cass.)
Effect of Salinity Stress on Antioxidant Defense System of Niger (Guizotia abyssinica Cass.)作者机构：Department of Biochemistry Bangalore University Bengaluru India
出 版 物：《American Journal of Plant Sciences》 (美国植物学期刊（英文）)
年 卷 期：2016年第7卷第6期
页 面：980-990页
学科分类：1008[医学-中药学(可授医学、理学学位)] 1006[医学-中西医结合] 100602[医学-中西医结合临床] 10[医学]
主 题：Niger Guizotia abyssinica Salinity Stress Antioxidants Antioxidant Enzymes Lipid Peroxidation
摘 要：Salinity is one of the principal abiotic stresses that affect plant productivity by inducing osmotic stress, which in turn, causes oxidative stress. Plants respond to this oxidative stress by adjusting levels of antioxidants and associated components. 10-day old seedlings of Niger were evaluated for abiotic stress response in terms of antioxidants and antioxidant enzymes over 72 h in presence of up to 500 mM NaCl in combination with CaCl2. Stress markers: H2O2, lipid peroxidation, antioxidants;ASC and GSH and antioxidant enzymes such as POX, APX and GR were significantly elevated, while CAT was reduced. The response was concentration and time-dependent up to 300 mM NaCl and fluctuated beyond. Metabolic enzymes β-amylase and acid phosphatase exhibited moderate increase relative to controls. The parameters indicated tolerance of the plants to salinity up to 300 mM over 48 h.
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