期刊论文

Physiological response of Chamaecrista rotundifolia to cadmium exposure

Huang, Y.-X.

中文

草业学报

1004-5759

2016

25

2

198-204

10.11686/cyxb2015158

国家科技支撑计划项目

本校为第一且通讯机构

圆叶决明是我国20世纪80年代从澳大利亚引进的豆科牧草,适合亚热带地区广泛种植。为探明圆叶决明的耐镉性,本文采用添加外源有效态镉的土壤盆栽试验方法,研究不同浓度(0,1,2,4,8 mg/kg)镉胁迫对圆叶决明CIP86134生长发育及其生理响应机制。结果表明,镉胁迫抑制圆叶决明的生长发育,降低其生物产量,且随镉浓度的升高,抑制作用加强。当镉处理浓度为4 mg/kg时,地下部、地上部生物产量与对照比显著下降,分别为对照的59.69%和63.77%。镉胁迫抑制圆叶决明叶绿素a、叶绿素b和类胡萝卜素的合成,镉浓度升高,叶绿素含量逐渐降低,处理之间达显著差异水平。镉处理浓度为1~2 mg/kg时,SOD、POD、CAT 3类保护酶协...

Chamaecrista rotundifolia, introduced from Australia in the 1980s is a leguminous forage widely cultivated in subtropical regions. The effects of cadmium (Cd) exposure on the growth and physiological characteristic of C. rotundifolia were studied at different Cd concentrations (0, 1, 2, 4, 8 mg Cd/kg dry soil) using a pot experiment. When C. rotundifolia was exposed to a Cd concentration of 1-2 mg Cd/kg soil, the protective enzymes superoxide dismutase (SOD), peroxidase (POD), and catalase (CAT) were all produced and C. rotundifolia growth was ...