Responses to Cadmium Stress of Nine Festuca arundinacea Schreb Varieties in Initial Growth Stage

The effect of Cd~(2+) concentration(0,25,50,75 mg/L) stress on the seed germination potential,germination rate,seedling root length,seedling height,fresh weight,chlorophyll content,malondialdehyde(MDA) content, cell membrane permeability of nine varieties of F.arundinacea Schreb were studied through solution culture experiment. The result showed that with Cd~(2+) concentration increased,germination potential and germination rate of Plantation and fresh weight of Magellan increased initial and then declined,and those of other eight varieties declined;seedling root length,seedling height,chlorophyll content of nine varieties declined;but MDA content and cell membrane permeability of them increased.The synthetic analysis of eight parameters indicated that under Cd~(2+) 25 mg/L stress,the order of cadmium tolerance was SoutheastTriple AWranglerⅡBingoMagellanPlantationAcending StarRewardArid 3,but under cadmium 50 mg/L stress,the order was SoutheastTriple ABingoMagellanWranglerⅡPlantationAcending StarArid 3Reward,whereas under cadmium 75 mg/L stress,the order was SoutheastBingoWranglerⅡTriple APlantationMagellanArid 3Acending StarReward.Therefore,F.arundinacea Schreb varieties should be selected reasonably in the environmental management of Cd * pollution according to the pollution degree.