1·The decline of the semilethal temperature caused by the membrane protective system is the physiological basis to improve cold resistance.
膜保护系统的适应性变化导致低温半致死温度的降低是抗寒性提高的生理基础。
2·The beneficial effect of choline chloride (CC) on growth, yield, product quality, photosynthesis, membrane permeability and cold resistance of plant were reviewed.
综述了氯化胆碱(CC)对植物生长、产量、产品质量、光合性能、膜透性、植物抗寒性等重要生理作用的有利影响。
3·Fertilizing in both early fast growing period and autumn can not only enhance seedling growth but also increase cold resistance.
既有速生前期施肥又有秋季施肥的处理，不仅提高了苗木的生长量，而且增强了苗木的抗寒性。
4·The results show that fertilizing in autumn after height growth stop can help seedlings absorb N and P and increase cold resistance.
既有速生前期施肥又有秋季施肥的处理，不仅提高了苗木的生长量，而且增强了苗木的抗寒性。
5·Analysis of protective enzyme indicates SOD activity and decrease of cat activity are closely related with cold resistance.
对保护酶类的初步分析显示：低温处理后SOD酶活性与CAT酶活性的降低与抗寒性密切相关。