摘要
镉是我国重金属污染土壤中最常见的元素,在酸性土壤中,镉能在水稻和蔬菜等作物根系中大量富集,并转运到地上部,其中可食部分的镉含量直接影响食品的质量安全。植物根系的细胞壁、细胞膜和细胞器对镉具有识别能力,能通过沉淀作用、络合作用和区域化作用等,把大量的镉固定在根系内,抑制其向地上部转运,从而保证地上部各种生理活动的正常进行。本文综述了植物根系细胞各组分的控镉原理,为发掘优异的种质资源和基因资源提供参考。
Cadmium（ Cd ） is the most common element found in the heavy-metal contaminated soils in China. Roots of rice and vegetables can concentrate Cd from acid soils, and then transport Cd to above-ground parts. Cd in edible part of plants directly influences the food safety. Cellwall, plasma membrane and org/mells of root cells in plant can discriminate Cd from other elements. A lot of Cd can be fixed in root cells by precipitation, complexation, compartmentation, and so on, to inhibit its transport from roots to shoot and guarantee the physiological activities in above-ground parts carrying oUt normally. This paper summarized recent advance on inhibiting Cd transport process in subcellu- lar fractions of root cells of plants, which is in advantage of exploring excellent germplasms and gene resources in the future.
出处
《农业资源与环境学报》
CAS
2016年第3期209-213,共5页
Journal of Agricultural Resources and Environment
基金
2015年中国农科院科技创新工程项目(2015-cxgc-lzq)
公益性行业(农业)科研专项(201403015)
关键词
镉
根系
细胞壁
细胞膜
转运
cadmium
root
eellwall
plasma membrane
transport
