摘要： 用200mg/L氯化胆碱短时（6h）与长时（48h）浸种可使盐棉48在19℃低温下的萌发率提高63.6%与111.8%,长时（48h）浸种使冀单23（玉米）在7℃低温下的萌发率提高130.3%,100mg/L氯化胆碱还使低温下黄瓜胚根生长抑制得到明显缓解。氯化胆碱的这些效应与其使低温下萌发种子、玉米及小麦幼叶膜透性降低密切相关。氯化胆碱也降低了水渍与黑暗、干旱胁迫下黄瓜子叶、小麦幼叶的膜透性。推测氯化胆碱增强多种逆境下的膜稳定性可能是通过防止膜及细胞内失水、修复膜结构、保护膜酶活性而实现的

关键词: 氯化胆碱, 低温, 干旱, 逆境, 膜稳定性

Abstract: It was observed that percentages of germination of cotton seeds(cv,Yanmian 48)at 19℃ and corn grains(cv,Jidan 23) at 7℃ could be greatly increased by 111.8% and 130.3% respectively with treatment of choline chloride (CC) at 200mg/L for 48h.Treatment with choline chloride at 100mg/L could evidently alleviate inhibition of radicle growth of cucumber (cv,Jinyan 4) under chilling stress.There was close relationship between that CC increased plant tolerance to chilling stress and that CC decreased plant membrane permeability (such as in germinating seeds and immature leaves from corn and wheat seedling) under the stress.It was also observed that CC reduced membrane permeability of cucumber cotyledon under darkness and waterlogging condition and of immature wheat leaves under drought stress.These results had shown that CC could maintain plant membrane stability under multiple stresses.In discussion,it had been speculated that CC might block water loss within membrane or cell,repair membrane structure,and keep membrane enzyme activity under multiple stresses.

Key words: Choline chloride, Chilling, Drought, Multiple stresses, Membrane stability

中图分类号: 

• S143.6