以4个荞麦品种为材料,采用PEG模拟干旱胁迫方法,研究了干旱胁迫对荞麦幼苗生长发育的影响.结果表明,随着胁迫强度和胁迫时间的延长,叶绿素含量逐渐下降,SOD、POD与CAT活性均表现为先升后降趋势、而MDA含量呈现上升趋势;与其他荞麦品种相比,西农9976具有较高的叶绿素含量,SOD、POD与CAT活性峰值最大,且活性最高值出现时间最晚,后期维持较高的酶活性,同时具有较低的MDA含量.
The effects of drought stress on growth and development of buckwheat seedling were treated with the osmotic stress solution PEGwere studied using four tartary buckwheat cultivars. The results showed that with the intensification and the time delay of drought,content of chlorophyll decreased gradually,and activities of superoxide dismutase (SOD),peroxi2 dase (POD),catalase (CAT) increased first then decreased,and content of malondialdephyde (MDA) increased gradually. Compared to other three tartary buckwheat cultivars,Xinong 9976 had the higher content of chlorophyll and the activities peak of dismutase (SOD),peroxidase (POD),catalase (CAT),the maximum value of activities was delayed,Xinong 9976 kept up the heigher Activities of protective enzymes and had a lower content of malondialdephyde (MDA).
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