硅对铝胁迫下花生幼苗根系形态和生理特性的影响  

Effect of silicon on the morphological and physiological characteristics of peanut seedling under aluminum stress

作　　者：姚昕[1] 李婧[1] 何霞[1] 刘洪[1] 沈雪峰[1] 

机构地区：[1]华南农业大学农学院,广东广州510642

出　　处：《中国油料作物学报》2014年第6期815-818,共4页Chinese Journal of Oil Crop Sciences

基　　金：华南农业大学校长基金(4100-k11138);华南农业大学大学生创新创业训练计划项目(SCX12103)

摘　　要：为了探讨铝胁迫条件下施硅对花生幼苗根系生长发育的影响,以花生品种粤油7号为材料,采用营养液培养法,研究了铝胁迫条件下硅对花生根系生长、根系活力、脂膜过氧化、抗氧化酶活性以及根系硅和铝元素含量的影响。结果表明,铝胁迫条件下,施硅处理后,花生根系活力、根表面积、根体积、根鲜重和硅元素含量显著提高,分别增加了50.4%,29.6%,15.7%,9.5%和44.7%;根系CAT,SOD和POD酶活性,MDA和铝元素含量显著下降,分别下降了39.1%,35.3%,31.9%,18.0%和23.5%。可见,铝胁迫条件下,施硅处理后,降低了铝元素的吸收,改善了花生根系生长发育情况,降低了抗氧化酶活性和膜脂过氧化作用,从而为硅缓解铝胁迫提供了理论依据。In order to investigate the effect of silicon （Si） on the growth and development of peanut seedling root under aluminum （A1） stress conditions, hydroponic peanut （Arachis hypogaea L. cv Yueyou 7） was used in this study. The results showed that the root activity, root surface, root volume, root fresh weight, and silicon content increased by 50.4% , 29.6% , 15.7% , 9.5% and 44.7% , but the activity of CAT, SOD and POD, the content of MDA and the content of aluminum decreased by 39.1% , 35.3% , 31.9% , 18.0% and 23.5% with silicon under aluminum stress. The absorption of aluminum elements reduced, the growth of peanut root improved, the activity of antioxidant enzymes and lipid peroxidation decreased with Si under A1 stress conditions. This also explained the role of silicon in alleviating the aluminum stress.

关 键 词：花生 硅 铝 根系 抗氧化酶活性 

分 类 号：S565.201[农业科学—作物学]