Changes in Antioxidant Status of Chlorophytum borivilianum Under Stress Conditions
ABSTRACT: Safed musli (Chlorophytum borivilianum Sant. and Fernad.) plants were raised in fertile soil in earthen pots and subjected to various durations of water stress and waterlogging (5 and 10 days). Lipid peroxidation in the leaf tissue was found to be greatly promoted by water stress and waterlogging treatment. In tuber tissue, the level of lipid peroxidation was increased due to water stress conditions. The SH content (which is an indicator of antioxidant capacity of cell) in leaf and tuber tissue was found to be reduced by both kinds of soil constraints and 10 days waterlogging was most effective in this respect. The level of an important antioxidant ascorbic acid in the leaf tissue was markedly increased by both stress factors while in case of tuber tissue, such trend was noticeable only in water stressed plants. The activity of antioxidant enzymes catalase and peroxidase in the leaf tissue were stimulated due to water stress and waterlogging condition. In case of tuber tissue, activity of catalase was stimulated by water stress; while, waterlogging stress caused reduction in activity of this antioxidant enzyme.