Effects of the artificial low temperature on the dormant buds and shoots of Dangshan pear in the central part of Yunnan Optimized Method for Detecting the Cold Hardiness of Grape Dormant Bud by Low Temperature Exotherms(LTE)Analysis and Its Utilization COMPENSATORY GROWTH RESPONSES OF TWO PLANTS WITH DIFFERENT GROWTH FORMS AFTER CLIPPING Rapid propagation in a Tibetan medicine--Przewalskia tangutica Studies on germination of dormant bud and seed of Elaeagnus mollis under tisssue culturing