水稻镉积累特性的生理和分子机制研究概述

王璐瑶¹^,², 陈謇³, 赵守清³, 闫慧莉¹, 许文秀¹, 刘若溪¹^,², 麻密¹, 虞轶俊⁴^,^*(

), 何振艳¹^,^*(

)

Research Progress of the Physiological and Molecular Mechanisms of Cadmium Accumulation in Rice

Luyao Wang¹^,², Jian Chen³, Shouqing Zhao³, Huili Yan¹, Wenxiu Xu¹, Ruoxi Liu¹^,², Mi Ma¹, Yijun Yu⁴^,^*(

), Zhenyan He¹^,^*(

)

图1. 水稻根部镉转运蛋白及镉在根中的径向转运示意图(Li et al., 2017; Zhao and Wang, 2020)
土壤中游离态的镉可在转运蛋白的协助下经共质体和质外体途径向根部中柱流动, 也可直接扩散至根内并向中柱转移。OsIRT2、OsFWL4、OsZIP1、OsNramp1和OsABCG43在根部表达但组织定位不明确(图中未标注)。

Figure 1. Schematic of Cd transporters in rice root and its radial transport route (Li et al., 2017; Zhao and Wang, 2020)
With the help of transporter, the free Cd in soil can flow to root central column through the symplast and explast pathways, and can also directly diffuse into root and transfer to the central column. OsIRT2, OsFWL4, OsZIP1, OsNramp1 and OsABCG43 are expressed in root, but their tissue localization is not clear (not marked in the figure).