栀子叶片生理特性与抗寒性的关系  

The relationship between physiological properties and cold resistance of Gardenia jasminoides leaf

作　　者：严寒静[1] 谈锋[2] 

机构地区：[1]广东药学院中药学院,广东广州510240 [2]西南师范大学生命科学学院,重庆400715

出　　处：《植物资源与环境学报》2005年第4期21-24,共4页Journal of Plant Resources and Environment

基　　金：国家自然科学基金重点资助项目"植物种群生态适应机理"(39330050)

摘　　要：以低温半致死温度(LT50)为评价指标,研究自然降温过程中栀子(Gardenia jasm inoidesE llis)叶片生理特性与抗寒性的关系。结果表明,随气温的降低,栀子叶片的LT50不断降低,由秋季9月中旬的-4.99℃降到冬季最冷1月中旬的-8.42℃,同时叶片相对含水量、自由水和淀粉含量均不同程度下降,束缚水、可溶性糖和可溶性蛋白质含量增加。这些渗透调节物含量的适应性变化导致LT50的下降。栀子的抗寒性与气温密切相关。Using semilethal temperature （LT50） as an index, the relationship between physiological properties and cold resistance of Gardenia jasminoides Ellis were studied during natural falling of temperature. The results showed that LT50 of G. jasrninoides leaf decreased with temperature falling, from -4.99℃ （in mid September） to -8.42℃ （in mid January） , the contents of relative water, free water and starch decreased at different degree while the contents of bound water, soluble sugar, soluble protein increased. The adaptive changes of osmoregulatory substances leaded to the falling of the semilethal temperature. The cold resistance of G. jasrninoides was closely relative with natural temperature falling.

关 键 词：栀子 低温半致死温度 生理特性 抗寒性 

分 类 号：Q945.78[生物学—植物学]