COLD STRESS TOLERANCE OF RECALCITRANT SEEDS: THE ROLE OF LEA-PROTEINS AND DEHYDRINS

Original title

УСТОЙЧИВОСТЬ РЕКАЛЬЦИТРАНТНЫХ СЕМЯН К НИЗКОТЕМПЕРАТУРНОМУ СТРЕССУ: РОЛЬ LEA-БЕЛКОВ И ДЕГИДРИНОВ

Authors

M.I. Azarkovich

Contact information

K.A. Timiryazev Institute of Plant Physiology RAS, Moscow, Russia, Этот адрес электронной почты защищён от спам-ботов. У вас должен быть включен JavaScript для просмотра.

Pages

43-46

DOI

10.31255/978-5-94797-319-8-43-46

Abstract

Recalcitrant seeds are shed from parent plant at high moisture content; seeds are desiccation intolerant. Seeds from trees of temperate zone have deep dormancy to withstand the forthcoming winter. Proteins in recalcitrant Aesculus hippocastanum L. and Quercus robur L. seeds contain extremely low content of globulins, and high level of non-compartmentalized heat-stable proteins (LEA-proteins and dehydrins). The presence of a great amount of hydrophilic proteins capable of holding water is related to the recalcitrancy of seeds. It might be as well that these proteins could improve seed tolerance to long-term action of low temperature in spite of their high hydration and thus maintain embryo vitality under conditions of cold stratification or snow in winter.