摘要： 以辣椒为试材,通过喷施不同浓度的水杨酸(SA),研究了SA对辣椒抗寒性的影响。结果表明,适宜浓度(≤2.0 mmol/L)的SA可降低低温条件下辣椒幼苗的伤害程度,使其萎蔫率降低,POD和CAT活性升高,叶绿素含量增加,丙二醛含量降低,辣椒的抗寒性增强;当浓度大于2.0 mmol/L时,辣椒幼苗体内的新陈代谢发生紊乱,使其抗寒性降低。从各浓度处理效果看,2.0 mmol/L的处理效果最好。

关键词: 辣椒, 水杨酸, 抗寒性

Abstract: Effects of salicylic acid on chilling??resistance of hot??pepper were researched by spraying SA in the present study. The results showed that suitable SA concentrat ion ( 2. 0 mmol/ L) decreased damage and wilt rat io of hot??pepper seedlings, increased act ivity of POD and CAT, and chlorophyll content, dropped MDA content at low temperature, and the chilling resistance of hot??pepper was improved. Metabolism of hot??pepper was disturbed, so its chilling resistance fell when SA concentration was above 2.0 mmol/ L. 2.0 mmol/ L of SA was the optimum concentration among all the treat??ments.

Key words: Hot??pepper, Salicylic acid, Chilling resistance

中图分类号: 

• S641.3