农业环境科学学报2012，Vol.31Issue(1)：99-105,7.
丛枝菌根真菌对紫花苜蓿吸收土壤中镉和锌的影响
Impacts of Arbuscular Mycorrhizal Fungi Inoculation on the Uptake of Cadmium and Zinc by Alfalfa in Contaminated Soil
摘要
Abstract
Uptake of cadmium(Cd) and zinc(Zn) from soil by Alfalfa(Medicagosativa L.) inoculated with different arbuscular mycorrhizal fungi( AMF) was investigated utilizing a greenhouse experiment. The eight examined AMFs included Gloumus lamellosumi G.la), Acaulospora mellea(A.m), Glotnus mosseae(G.m), Glomus intraradices{G.I), Glomus etunicatum(G.e), Glomus constrictum(G.c), Diversisporaspurcum (D.s) and Glomus aggregatum(G.a). It was observed that the alfalfa roots were effectively colonized by AMFs even in the contaminated soil by Cd and Zn. The accumulation of Cd and Zn in plant was enhanced with AMF inoculation. However, mycorrhizal effects on plant growth and accumulation of Cd and Zn differed between test AMFs. Compared to no-AMF control, the concentration and accumulation amount of Cd and Zn increased in roots, but they decreased in shoots with the inoculation of AMFs. This indicates that AMF inoculation impeded the translocation of Cd and Zn from root to shoot, and consequently weakened the toxicity of these heavy metals to plant shoot. It was proposed that the increase of the plant biomass by AMF inoculation affected the enhancement of Cd and Zn concentration and accumulation in plant. Results of this work provided useful information on the AMF-based uptake of heavy metals by plants, and would potentially be helpful to risk assessment and food security in contaminated soils.关键词
丛枝菌根真菌/镉/锌/植物吸收/土壤Key words
arbuscular mycorrhizal fungi/cadmium/zinc/plant uptake/soil分类
资源环境引用本文复制引用
黄晶,凌婉婷,孙艳娣,刘娟..丛枝菌根真菌对紫花苜蓿吸收土壤中镉和锌的影响[J].农业环境科学学报,2012,31(1):99-105,7.基金项目
霍英东教育基金会第十二届高等院校青年教师基金(122045) （122045）
国家自然科学基金(21077056) （21077056）
