Dependence of dormancy release on temperature in different origins of Pinus sylvestris and Betula pendula seedlings

摘要: The chilling requirement of rest completion and the high temperature growth initiation were determined in three origins silver birch (Betula pendula Roth.) seedlings five Scots pine (Pinus sylvestris L.) seedlings. In both was highest maritime Scottish lowest most continental Finnish Russian origins. for southern mountainous Spanish Bulgarian between. terms requirement, there no clear differences between These results suggest that owing to their which prevents beginning loss frost hardiness during frost‐exposed season, from a climate could be tolerant under climatic warming.