外源硅从植物角度调控川芎镉吸收的可行性初探

Feasibility of Exogenous Silicon in Regulating Cadmium Absorption of Ligusticum chuanxiong Hort. from the Plant Perspective

近年来,川芎因重金属镉含量超标问题正面临严峻的国际市场挑战。降低川芎镉含量成为亟待解决的问题。笔者首先对当前川芎镉问题研究进展进行论述,包括川芎中镉的来源途径、控制川芎镉含量的常用措施。指出现有的控制措施研究多集中在从降低土壤中活性态镉含量的角度,来减少镉对川芎的污染毒害。然而研究已证实川芎系对土壤中镉元素有富集作用的植物,目前的研究缺乏探讨减少川芎对镉的主动吸收。基于此,笔者首次从植物角度浅析外源硅降低川芎对镉主动吸收的可行性,旨在为探索寻找有效降低川芎镉含量的方法提供借鉴。

In recent years,Ligusticum chuanxiong Hort. is facing a serious international market challenge due to excessive levels of heavy metal cadmium. Reducing the cadmium content of L. chuanxiong has become an urgent problem to be solved. This paper first discusses the current research progress on high cadmium of L. chuanxiong including the sources of cadmium and the common measures to control the cadmium content of L. chuanxiong. It is pointed out that the existing control measures mainly focus on reducing the content of active cadmium in soil to reduce the toxicity of cadmium to L. chuanxiong. However,it has been proved that L. chuanxiong has an enrichment effect on soil cadmium,and the current research lacks to explore the reduction of active absorption of cadmium by L.chuanxiong. Based on this,this paper is the first time to analyze the feasibility of exogenous silicon to reduce the active absorption of cadmium by L. chuanxiong from a plant perspective,in order to provide a reference for exploring ways to effectively reduce the cadmium content of L. chuanxiong.