绿豆对镉胁迫的生理响应  

Physiological response of Vigna radiata L.under cadmium stress

作　　者：张晓娟[1] 庄枫红 ZHANG Xiao-juan;ZHUANG Feng-hong(School of Life Sciences,South China Normal University,Guangzhou 510631,China)

机构地区：[1]华南师范大学生命科学学院,广州510631

出　　处：《湖北农业科学》2020年第15期71-74,79,共5页Hubei Agricultural Sciences

摘　　要：采用水培法研究了不同镉浓度对绿豆(Vigna radiata L.)生长及生理生化特性的影响。结果表明,随着Cd2+浓度的升高,绿豆幼苗的株高、鲜重均受到显著抑制,幼苗叶片中叶绿素含量降低,而丙二醛含量、超氧化物歧化酶(SOD)活性、过氧化物酶(POD)活性和过氧化氢酶(CAT)活性均呈上升趋势,可溶性糖含量则呈先上升后下降的变化趋势。这说明Cd胁迫会破坏绿豆的生物膜功能特性,造成氧化胁迫,从而影响绿豆的生长发育。Hydroponic culture was conducted to study the effect of different concentrations of cadmium stress on the growth and physio⁃logical and biochemical characteristicsof seedings of Vigna radiata L..The results showed that the plant height and fresh weight of seedings of Vigna radiata L.were inhibited with the increase of Cd2+concentration;The chlorophyll content of the leaves of seedings decreased,but malondialdehyde(MDA)content,superoxide dismutase(SOD)activities,peroxidase(POD)activities and catalase(CAT)activities gradually increased with the increase of Cd concentration,while the soluble sugar content increased at the beginning then decreased.The results indicated that the Cd2+stress would destroy the biofilm function of Vigna radiata L.,caused the oxidative intimidation and affected their growth and development.

关 键 词：绿豆(Vigna radiata L.) 镉胁迫 幼苗生长 生理生化特性 

分 类 号：S522[农业科学—作物学]