【摘要】 在 1 5 % PEG60 0 0胁迫条件下 ,研究了氯化胆碱 ( choline chloride,CC)对小麦种子萌发的影响。研究结果表明 ,CC对受 1 5 % PEG60 0 0胁迫的小麦种子的萌发及根、芽的生长具有明显的促进作用 ,且以 60 mg/L CC的效果最好。与对照相比 ,在该浓度下 ,平均根长及平均芽长分别可提高 1 4.6%和 1 2 .9% ,总鲜重可提高 1 7.7% ,根 /芽比值及萌发率也有所提高 ,但对生根数无多大影响。同时 ,CC可使小麦种子 α-淀粉酶的活力提高 2 8.0 % ,使培养介质电导率增长率显著降低 ,还可使 POD活性上升幅度低 30 .6%。表明 ,CC促进小麦种子萌发及根、芽生长与提高α-淀粉酶酶活力、降低萌发种子中电解质外渗量及降低 POD活性有密切联系。更多还原

【Abstract】 Effects of choline chloride (CC) on germination of wheat seeds under 15% PEG 6000 stress were studied. The results indicated that CC could obviously promote the germination of wheat seeds and the growth of its sprouts under 15% PEG 6000 stress with the best results at 60 mg/L. With the treatment of 60 mg/L CC, the mean length of the roots and that of sprouts could be increased by 14.6% and 12.9% respectively, and the total fresh weight by 17.7%. Moreover, the ratio of root length and sprout length and the rate of germination also increased slightly. However, the number of roots was influenced little. On the other hand, after the wheat seeds were treated by CC, the α-amylase activity could be enhanced by 28.0% and the increasing rate of electric conductivity decreased significantly. CC could also make POD activity decrease by 30.6%. All these showed that there existed a close relationship among the germination of wheat seeds and the growth of sprouts and such physiological indicators as α-amylase activity, permeability of membrane and POD activity.\;更多还原