Rehardening potential of Scots pine seedlings during dehardening

Abstract

The ability of one- and two-year-old Pinus sylvestris seedlings to reharden during the dehardening period was studied. Naturally hardened quiescent seedlings were preconditioned at 0°C for ten days then placed in chambers at different forcing temperatures with different light regimes. The forcing periods were followed by cool periods. Dehardening seemed to be a partially reversible process. -from Author