盐对盐生植物种子萌发的抑制

THE INHIBITION OF SALINITY ON THE GERMINATION OF HALOPHYTE SEEDS

用不同浓度NaCl和等渗PEG(分子量为 6 0 0 0 )处理四种盐生植物种子 ,通过对某些生理指标的测定 ,结果表明 :NaCl和等渗PEG对种子的萌发都产生抑制作用 ,且PEG的抑制程度大于等渗NaCl,这说明渗透胁迫是影响盐生植物种子萌发的主要因素。在盐胁迫条件下 ,还用外源GA3 对种子进行处理 ,发现GA3

Four species of halophytic seeds were treated with NaCl solutions of different concentration and iso-osmotic PEG solutions.According to test the germination rate,germination index,We can conclude that:NaCl and iso-osmotic PEG had inhibitory effect on the germination of four halophytic seeds,and the inhibitory level of PEG were greater than that of iso-osmotic NaCl.These indicate that the osmotic stress is the main factor which affect germination of halophytic seeds.On the condition of salt stress plus GA 3 (10mg/L),the results shown that GA 3 can lysis the inhibition of NaCl on the germination of seeds.