Fengci mulberry seeds being used as material,the effects of the different contents of polyethylene glycol(PEG)(0,1,2.5,5,7.5 and 10 g/L-simulated drought stress on mulberry seed germination and physiology were studied.The results showed that the germination velocity,ratio and potential of the seeds that were treated with 1 % PEG were higher than the CK,but those of other treatments were obviously decreased as the increase of the content of PEG.The seeds treated with 10 %PEG did not germinate after 5 days.Th...