数字农科院2.0

Selenate reduced wheat grain cadmium accumulation by inhibiting cadmium absorption and increasing root cadmium retention

文献类型： 外文期刊

作者： Xuerong Di;Xu Qin;Yihua Wei;Xuefeng Liang;Lin Wang;Yingming Xu;Sun Yuebing;Qingqing Huang

作者机构：

关键词： Absorption inhibition;Cd contamination;Selenate;Wheat

期刊名称： Plant Physiology and Biochemistry

ISSN： 0981-9428

年卷期： 2023 年 204 卷

页码：

收录情况： SCIE（2023版）

摘要： Selenium (Se) fertilizer has been recently used to reduce cadmium (Cd) accumulation in plant. A pot culture was performed to analyze Cd uptake, translocation, and distribution in wheat plants during the reproductive growth period in a Cd–contaminated soil after selenate was applied to the soil, and a hydroponic culture was carried out to investigate the effects of selenate application on Cd2+ influx, subcellular Cd distribution, and Cd accumulation in wheat seedlings. Results showed that selenate application had no significant effect on DTPA–Cd and Cd fraction in soil. The application of selenate greatly inhibited the whole–plant Cd absorption by 14%–23%. In addition, selenate prompted the retention of Cd in root by increasing the Cd distribution in the vacuole, which reduced the root–to–shoot Cd translocation by 18%–53%. The application of selenate increased the Cd concentration in nodes, inhibited Cd remobilization from nutritive organs to grain, and ultimately reduced Cd accumulation in wheat grain. Further, heading to grain filling was the key growth stage for exogenous selenate to regulate grain Cd accumulation. In summary, soil selenate application is an effective method to reduce grain Cd concentration in wheat, which provided scientific basis for remediation of Cd–contaminated soil.

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