HEAT-SHOCK TOLERANCE AND ANTIOXIDANT ACTIVITY IN MOTH BEAN SEEDLINGS TREATED WITH TETCYCLACIS Academic Article uri icon

abstract

  • Moth bean (Vigna aconitifolia (Jacq.) Marechal cv. Jaadia) seeds were germinated in the presence of 0, 18, or 36 M solutions of the gibberellin biosynthesis inhibitor, tetcyclacis. After 72 h, seedlings were exposed to 22 or 48C for 90 min. The 48C temperature dramatically increased total electrolyte and sugar leakage from the seedlings, particularly in the controls. Tetcyclacis reduced electrolyte and sugar leakage at 48C by 15-35% compared to the 48C controls. High temperature increased malondialdehyde concentration in control seedlings but not in treated seedlings indicating that tetcyclacis inhibited high temperature-induced lipid peroxidation. Relative to the control, tetcyclacis tended to increase the total activities of catalase and peroxidase in the seedlings. In contrast, tetcyclacis tended to decrease ascorbic acid oxidase activity, particularly at 48C. These results suggest that tetcyclacis conferred at least some heat shock tolerance to moth bean seedlings. This increased tolerance was correlated with increased activities of some antioxidant systems. 1991 Kluwer Academic Publishers.

published proceedings

  • PLANT GROWTH REGULATION

author list (cited authors)

  • UPADHYAYA, A., DAVIS, T. D., & SANKHLA, N.

citation count

  • 9

complete list of authors

  • UPADHYAYA, A||DAVIS, TD||SANKHLA, N

publication date

  • August 1991