Pb、Cd胁迫对紫茎泽兰N、P、K吸收的影响  

Effects of lead,cadmium on N,P,K uptake of Ageratina adenophorum

作　　者：刘小文[1,2,3] 齐成媚[2] 欧阳灿斌 李园[3] 颜冬冬[3] 王秋霞[3] 郭美霞[3] 曹坳程[3] 

机构地区：[1]湘南优势植物资源综合利用湖南省重点实验室,永州425199 [2]湖南科技学院生命科学与化学工程系,永州425199 [3]中国农业科学院植物保护研究所,北京100193

出　　处：《植物保护》2015年第4期84-89,共6页Plant Protection

基　　金：公益性行业(农业)科研专项(201103027);湖南省自然科学基金(13JJ6080);湖南省重点学科建设项目(2011-76);湖南省高校科技创新团队支持计划(2012-318)

摘　　要：采用模拟Pb、Cd污染土壤培养法研究了紫茎泽兰在重金属Pb、Cd胁迫下植株不同部位对3种营养元素(N、P、K)吸收的影响。结果表明,紫茎泽兰各组织在Pb胁迫下对N、P的吸收总体上均保持一定的促进作用,对K则表现出一定的抑制效应;Cd胁迫下对N、P有良好的吸收,低浓度Cd促进K的吸收,高浓度则表现出抑制作用。Pb-Cd复合污染胁迫下根茎叶均对N的吸收有一定的促进作用,而对K的吸收有较强的抑制效应。这表明,紫茎泽兰在重金属Pb、Cd胁迫下可通过大量吸收N、P等元素来有效缓解重金属的毒害作用,这可能也是紫茎泽兰能适应高Pb、Cd胁迫的一种耐性机制。The effects of Pb,Cd on nutrient elements （N,P,K）uptake in different parts of Ageratina adenopho-rum were investigated in a soil pot experiment.The results showed that it had a positive effect on the absorption of N,P in different tissues under Pb stress,but negative effect on K uptake.Under the conditions of Cd stress,it was favorable for the absorption of N,P in different tissues,and the absorption of K was promoted at low Cd concentration,but inhibited at high concentration.It also had a positive effect on the absorption of N in different tissues under combined Pb-Cd pollution stress,but negatively affected K uptake.A large quantity of N and P was absorbed to alleviate the toxic effects on A.adenophorum by heavy metals.It is a possible tolerance mechanism of E .adenophorum under Pb and Cd stresses.

关 键 词：紫茎泽兰 PB CD 营养元素 

分 类 号：S45[农业科学—植物保护]