Dehydrins of Betula pendula Roth bads: characteristics of seasonal dynamics

Dehydrins of buds of the Asian white birch ( Betula pendula Roth) are presented by low and middle molecular weight forms. Dehydrins with molecular wts of 66 and 69 kDa were detected the whole year round. They showed weak seasonal changes. Conversely, low molecular weight dehydrins, predominantly with molecular wt 17 kDa, were characterized by the largest seasonal changes. In Karelia they were detected in September, in Yakutia – in August, and were present in large amounts in winter and absent early (Karelia) or late in May (Central Yakutia). The results suggest that these proteins participate in the development of frost hardiness of plants in different climatic conditions.