摘要
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 PEG were 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）,peroxidase（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）.
出处
《华北农学报》
CSCD
北大核心
2009年第4期153-157,共5页
Acta Agriculturae Boreali-Sinica
基金
科技部科技支撑计划(2006BAD02B06)
国家高技术研究发展计划("863"计划)项目(2006AA100201)
西北农林科技大学植物遗传育种专项资助
关键词
干旱胁迫
荞麦幼苗
保护酶活性
Drought stress
Buckwheat seedling
Activities of protective enzymes
