【摘要】 以多年生栀子为材料,对其在自然降温过程中的适应性进行了研究。结果表明:随温度的降低,低温半致死温度不断降低;渗透调节物可溶性糖、可溶性蛋白含量增加,淀粉含量下降;内源激素ABA含量上升,与低温半致死温度呈负相关(相关系数为-0.967 3),GA含量下降与低温半致死温度呈正相关(相关系数为0.812 5)。综上所述在自然降温过程中,这些物质的适应性变化导致低温半致死温度的下降,从而使栀子的抗寒性增强,能很好的适应栽培地的低温条件而安全越冬。更多还原

【Abstract】 Investigated the adaptation of Gardenia jasminoides Ellis leaves to natural temperature reduction.The results showed that with temperature decreased,the semilethal temperature(LT50) decreased increasingly.The content of osmoregulation substance such as soluble suger,soluble protein increased to the different degree,while the content of starch decreased.The content of endogenous hormone such as ABA rose continuously and negatively correlated to LT50(R=-0.967 3).On the contrary,the content of GA reduced,which the content of GA was positively correlated to LT50(R=(0.812 5)).In summary,the adaptive changes of these substance including osmoregulation substance and endogenetic hormones of G.jasminoides Ellis leaves led to the reduction of LT50,thus make G.jasminoides Ellis suit the low temperature condition cuitivated and pass the winter safely.更多还原