Nitika Arora, Renu Bhardwaj, Priyanka Sharma, Hardesh Kumar Arora and Priya Arora
Keywords: Antioxidative enzymes, 28-Homobrassinolide, lipid peroxidation, maize, Zinc.
Abstract: The effects of 28-homobrassinolide (28-homoBL) on growth, lipid peroxidation and antioxidative enzyme activities in the Zea mays L. (var. Partap-1) seedlings exposed to zinc (Zn) metal were studied. The surface sterilized seeds of Zea mays were given treatments of different concentrations of Zn metal (0.5, 1.0, 1.5 and 2.0 mM) alone or in combination with 28-homoBL (10-4, 10-6 and 10-8 mM) for seven days. The activities of antioxidative enzymes (superoxide dismutase (EC 1.15.1.1) catalase (EC 1.11.1.6), ascorbate peroxidase (EC 1.11.1.11), guaiacol peroxidase (EC 1.11.1.7) and glutathione reductase (EC 1.6.4.2)), protein and malondialdehyde (MDA) content were analyzed in seven days old seedlings. It was observed that 28-homoBL treatments stimulated the activities of antioxidative enzymes and the level of MDA content was decreased, thus indicating the stress-ameliorative effects of 28-homoBL.
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