咖啡幼苗对镉胁迫的生理响应  

Physiological Responses of Coffee Seedling to Cadmium Stress

作　　者：王娅玲[1] 李维峰[1] 王永林[1] 苏志龙[2] 

机构地区：[1]云南农业大学热带作物学院,云南普洱665000 [2]普洱学院,云南普洱665000

出　　处：《安徽农业科学》2015年第12期1-2,9,共3页Journal of Anhui Agricultural Sciences

基　　金：云南热带作物职业学院科研基金资助项目(009RYY2013005)

摘　　要：[目的]为了研究镉对咖啡幼苗生理特性的影响。[方法]以小粒种咖啡为供试植物,采用盆栽方法,在镉胁迫处理60 d后进行超氧化物歧化酶（SOD）、过氧化物酶（POD）、过氧化氢酶（CAT）、丙二醛（MDA）以及叶绿素含量生理指标的测定。[结果]当镉浓度在0-80 mg/L范围内,咖啡幼苗叶绿素含量先上升后下降,CAT、POD、SOD活性先升高后下降,MDA含量则一直呈现增加的趋势。[结论]镉胁迫下咖啡幼苗的膜系统受到过氧化损伤。[ Objective ] The research aimed to elucidate the influence of cadmium on the related physiological indexes in coffee seedling. [ Method ] Taken arabica coffee as tested plants,pot culture method was used to determine chlorophyll, SOD,POD, CAT and MDA with the different concentrations of cadmium stress for 6 weeks. [ Result ] When cadmium concentration was 0 - 80 mg/L, chlorophyll content increased first and then decreased. The activities of CAT,POD and SOD went up at the beginning of cadmium stress,but they were decreased as the quantity of cadmium increasing. And MDA content increased all the time. [ Conclusion] The membrane system of coffee seedling was damaged by cadmium stress.

关 键 词：镉胁迫 咖啡幼苗 叶绿素 抗氧化酶 

分 类 号：S571.2[农业科学—作物学]