两种鸢尾幼苗对Cd胁迫的生理耐性探讨  

Physiological Tolerance Studies of Two Different Species of Iris L.Seedlings under Cadmium Stress

作　　者：佟海英[1] 原海燕[1] 黄苏珍[1] 

机构地区：[1]江苏省中国科学院植物研究所(南京中山植物园),南京210014

出　　处：《北方园艺》2008年第11期109-112,共4页Northern Horticulture

基　　金：国家自然科学基金资助项目(30270940);江苏省农业高新技术资助项目(BG2003308)

摘　　要：以马蔺(Iris lacteavar.chinensis)和鸢尾(I.tectorum)2种耐性不同的鸢尾属植物为材料,采用溶液培养试验,研究了101、20 mg/L Cd胁迫下2种鸢尾幼苗膜透性、可溶性糖和蛋白以及根系生长等的生理耐性差异。结果表明:10 mg/L低Cd胁迫和120 mg/L高Cd胁迫均导致2种鸢尾幼苗叶片膜透性(CMP)增加;马蔺根系活力、可溶性糖和蛋白含量在低浓度Cd胁迫下增加,高浓度Cd胁迫下根系活力和可溶性糖含量出现下降趋势,而可溶性蛋白含量持续增加;鸢尾根系活力在低浓度和高浓度Cd胁迫下均呈下降趋势,可溶性糖和蛋白含量随Cd浓度增加表现为先增后降的趋势。Two Iris （Iris L. ） spedes..Iris lactea var. chinensis and 1. tectorum were grown hydroponically in this study to examine physiological endurance difference of cellular membrane penetration , soluble sugar, protein, and root activity of them. The results indicated that both lower Cd stress （10 mg· L^-1 ） and high Cd stress （120 mg· L^-1 ）made CMP of two species of Iris L. improved. Under lower Cd stress, the root activity and soluble sugar and protein content of Iris. lactea var. chinensis increased. Under high Cd stress, the root activity and soluble sugar decreased but soluble protein constantly growed. While root activity of Iris. tectorum always showed decreasing trend under Cd stress, and its soluble sugar and protein rised firstly and dropped aflerwords with the increase of Cd concentration.

关 键 词：马蔺 鸢尾 CD胁迫 生理耐性 

分 类 号：S682.3[农业科学—观赏园艺]