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

CLC Number: 

• S143.6