Abstract
Lipid peroxidation (LPO) in leaves of pea plants( Pisum sativum L.) induced by low temperature treatment was studied. After damage cooling the activity of light-dependent and dark LPO reactions in leaves increased. Increase in the LPO activity was observed after cooling at temperature ranging from 0°C to −5°C in the dark and at temperatures lower than −5°C down to the minimal used temperature −15°C in the light. Decrease in the growth temperature lowered the degree of leaf membrane alterations after freezing-thawing that was determined by electrolyte leakage measurements and also by LPO products levels. It can be suggested that cultivation of pea plants at low positive temperature should cause activation of the mechanisms, preventing the development of LPO processes, which play a significant role in damaging of membrane structures by freezing-thawing.
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