Position: Home > Articles > Effect of Cd~(2+) on physiological characteristics of alfalfa
Agricultural Research in the Arid Areas
2007,25
(5)
151-154+171
镉对紫花苜蓿种子萌发等生理特性的影响
作 者：
韩多红;孟红梅;王进;马国泰;李彩霞;张芬琴
单 位：
河西学院生物系;河西学院植物科学系
关键词：
Cd2+处理;紫花苜蓿;阿尔冈金;新疆大叶;种子萌发
摘 要：
以阿尔冈金(Algonquin)和新疆大叶(M. sativa L. cv. xinjiangdaye)种子为试验材料,研究了0~5mg/L浓度的Cd2+处理对其种子生理特性的影响。结果表明:低浓度和高浓度的Cd2+对二者种子的发芽势和发芽率均有抑制作用,而中间浓度却有促进作用,呈现"下降-回升-下降"的现象;发芽指数和活力指数,均随着Cd2+浓度的增大而下降;与对照相比,随Cd2+处理浓度的增大,阿尔冈金和新疆大叶的下胚轴、根长、苗长、地上部分鲜重、地下部分鲜重都随之降低,但新疆大叶降低的幅度更大一些;随着Cd2+处理浓度的升高,阿尔冈金和新疆大叶的脯氨酸、电解质泄漏率、丙二醛(MDA)含量都随之增大;但在同浓度的Cd2+处理下:幼苗叶片中的脯氨酸含量:新疆大叶>阿尔冈金;电解质泄漏率:新疆大叶<阿尔冈金;丙二醛(MDA):新疆大叶<阿尔冈金。试验表明,优良牧草紫花苜蓿的两个品种中,阿尔冈金对Cd2+胁迫的耐受能力要强于新疆大叶。
译 名：
Effect of Cd~(2+) on physiological characteristics of alfalfa
作 者：
HAN Duo-hong1,MENG Hong-mei1,WANG Jin2,MA Guo-tai1, LI Cai-xia1,ZHANG Fen-qin1 (1.Biology Department,Hexi University,Zhangye,Gansu 734000,China; 2.Plant Science Department,Hexi University,Zhangye,Gansu 734000,China)
关键词：
Cd2+ treatment;alfalfa;Algonquin;Xinjiangdaye;seed germination
摘 要：
With an experiment,the effect of Cd2+ for 0～5 mg/L on physiological characteristics of alfalfa varieties Algonquin and Xinjiangdaye was studied.The results show that the Cd2+ treatment at lower concentration and at higher concentration can decrease the germination rates and the germination vigor,the middle Cd2+ treatment can increase the germination rates and the germination vigor.It is shown that "decreasing-increasing-decreasing".With the Cd2+ treatment increasing,the germination index and vitality index were decreasing,hypocotyl length,root length,shoot length,fresh weight on and under ground were decreasing.With the Cd2+ treatment increasing,proline contents,permeability of plasmalemma and MDA contents were increasing.With the same Cd2+ treatment,proline contents: Xinjiangdaye is higher than Algonquin;permeability of plasmalemma:Xinjiangdaye is lower than Algonquin;MDA contents:Xinjiangdaye is lower than Algonquin.The experiment may suggest that Algonquin is stronger to resist against Cd2+ stress than Xinjiangdaye.
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