Brassinosteroids influence on Brassica oleracea L. seeds tolerance to the accelerated aging

Abstract

The influence of 24-epibrassinolide (EB) on the tolerance of cabbage seeds with different content of residual chlorophylls to accelerated aging induced by high air humidity and temperature has been studied. Seeds with a higher content of chlorophylls are more sensitive to stress conditions of storage. The damaging effect of chlorophylls is probably associated with the generation of reactive oxygen species and oxidative stress. EB delays development of damage at the accelerated aging of cabbage seeds, particularly in the seeds with a higher chlorophyll content. The positive effect of EB is shown to maintain the integrity of cell membranes, to accelerate the initiation of cell cycle in embryonic roots and the rate of germination. The influence of brassinosteroids on seed tolerance to accelerated aging may be associated with the induction of heat shock protein synthesis and the activation of proton pump in plasma membrane. Refs 40. Figs 2. Tables 4.

Keywords:

Cabbage (Brassica oleracea L.), seeds, accelerated aging, brassinosteroids, epibrassinolide, seed tolerance, chlorophylls