单 位：
黔南民族师范学院生命科学系;黔南民族师范学院化学系
摘 要：
[目的]研究镉胁迫对皱叶留兰香生理特性的影响。[方法]以皱叶留兰香为试材,镉胁迫设7种浓度(0、5、10、20、30、50和100mg/L),通过水培试验研究不同浓度的Cd2+对野生蔬菜皱叶留兰香生理生化特性的影响。[结果]当Cd2+浓度为5 mg/L时能促进皱叶留兰香植株鲜重和主要食用部位的生长,当Cd2+浓度大于10 mg/L时则明显抑制其生长。当Cd2+浓度>5 mg/L时,随着Cd2+浓度的升高,皱叶留兰香叶绿素总量及叶绿素a/b比值降低;根系活力呈先升后降的趋势;植株体内细胞膜透性和MDA含量逐渐增高;SOD活性呈先升后降的趋势,在10 mg/L达到峰值;POD活性增加;CAT活性呈先升后降的趋势,表明SOD、POD和CAT对镉引起的氧化胁迫具有相应的适应和抵抗能力。[结论]该研究为皱叶留兰香生产中金属镉的污染预报及消除其毒害提供理论依据。
译 名：
The Physiological Response of Mentha cdispata Schrad to Cadmium Stress
作 者：
LIU Li-ping et al(Department of Life Science,Qiannan Normal College of Nationalities,Duyun,Guizhou 558000)
关键词：
Mentha Cdispata Schrad;Cd2+ stress;Physiological and biochemical characteristics
摘 要：
[Objective] The propose was to study the effect of cadmium stress on the physiological characteristics of Mentha Cdispata Schrad.[Method] In water culture experiment,with M.Cdispata as the tested material,the cadmium stress was set up with 7 kinds of concn.of Cd2+(0,5,10,20,30,50 and 100 mg/L) to study the effect of Cd2+ with different concn.on the growth and physiological and biochemical characteristics of wild vegetable M.Cdispata.[Result] Cd2 concn.at 5 mg/L could promote the fresh weight and the growth of main edible part of M.Cdispata plant and Cd2 concn.at 10 mg/L could obviously inhibit the growth of M.Cdispata.When Cd2+ concn.was more than 5 mg/L,with increasing of Cd2+concn.,the total chloropyll and the ratio of chiorophy a/b in M.Cdispata were decreased;the root activity showed the trend of first increasing and then decreasing;the cell membrane permeability and MDA content in plant was gradually increased;SOD activity was first increased and reached the peak value until Cd2+ was 10 mg/L,and then was decreased;POD activity was increased;CAT activity showed the trend of first increasing and then decreasing,showing that SOD,POD and CAT had the corresponding adaptability and resistance to the oxidative stress caused by Cd2+.[Conclusion] This research provided the theoretical basis for predicting the pollution of metal Cd2+ and eliminating its damage in the production of M.Cdispata.
