3种锦鸡儿属植物幼苗对持续干旱的生理响应

[目的]为乌鲁木齐的荒山绿化植物选择提供依据。[方法]以刺叶锦鸡儿、白皮锦鸡儿和柠条锦鸡儿为材料,幼苗生长90 d时停止浇水,叶片枯蔫后再恢复浇水。研究了叶片中脯氨酸、可溶性糖、丙二醛和叶绿素含量的变化。[结果]刺叶锦鸡儿在干旱处理后第12天叶片大量枯黄,另外2种锦鸡儿在第18天叶片枯黄。正常水分条件下,3种锦鸡儿的脯氨酸含量较低,在0.002~0.005 mg/g之间。干旱处理后期快速增加,浇水后含量下降。叶片枯黄时,柠条锦鸡儿的脯氨酸含量最高,为（0.970±0.004）mg/g。可溶性糖含量的变化趋势与脯氨酸相似。正常水分条件下,刺叶锦鸡儿的可溶性糖含量最高。柠条锦鸡儿的丙二醛含量呈M型曲线变化,白皮锦鸡儿始终保持较低水平,刺叶锦鸡儿在处理后期含量较高。干旱期间,3种锦鸡儿的叶绿素含量持续下降,恢复浇水后上升。[结论]刺叶锦鸡儿的抗旱能力较白皮锦鸡儿和柠条锦鸡儿弱。

Physiological Response of 3 Kinds of Caragana Plant Seedlings on Continuous Drought

[Objective] The aim was to provide the basis for the greening of barren hills in Urumqi.[Method] With Caragana acanthophylla,Caragana leucophloea,Caragana korshinskii as the materials,watering was stopped at the 90th day after seedling growth and was recovered after leaf withering.And the changes of contents of praline,soluble sugar,MDA and chlorophyll in leaves were studied.[Result]After drought treatment,most leaves of C.acanthophylla withered and yellowed at the 12th day,and the leaves of other 2 kinds o...