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March 15, 2026Chinese Science Bulletin (Chinese Version)0 citationsOpen Access

Mechanistic Advances and Process Integration of Selenium Migration and Transformation in Paddy Fields

BYBin YangQXQing XiaHLHao Liu

Key Points

  • This research aims to understand the comprehensive processes of selenium migration in paddy fields and its impact on rice selenium content.
  • Developed a continuous migration model from soil to rice grain.
  • Analyzed soil geochemical processes affecting selenium availability.
  • Investigated root absorption pathways for selenium in rice plants.
  • Identified that bioavailable selenium forms dictate rice selenium content, not total soil selenium.
  • Highlight the critical role of selenium-containing amino acids in grain accumulation.
  • Emphasized the dynamic interactions between selenium forms and plant uptake processes.

Abstract

硒是人体必需微量元素,提高稻米硒含量是缓解“隐性硒饥饿”的有效途径。稻田硒迁移转化涵盖土壤地球化学过程、根际微界面调控及水稻生理代谢,然而现有研究多聚焦于单一环节,缺乏全过程的系统耦合认知。这导致天然富硒区“土壤高硒-稻米低硒”的现象和外源施硒效果不稳定的问题难以系统阐明。为此,本文构建了贯穿土壤-水稻系统“土壤释放-根际吸收-体内转运-籽粒富集”的硒连续迁移过程:土壤过程重点解析了pH-Eh、有机质及Fe/Al氧化物和微生物对硒形态转化和有效性硒供给的调控机制;植物过程系统梳理了硒酸盐SeVI/亚硒酸盐SeIV吸收转运通道、硒代氨基酸同化与解毒机制,强调硒代蛋氨酸在跨器官迁移与籽粒富集中的主导作用。基于整体过程重新审视天然富硒区“土壤高硒-稻米低硒”与外源施硒效果不稳定机制表明,决定稻米硒含量的关键是有效性硒的形态组成及与水稻吸收转运通路的动态匹配程度,而非土壤总硒含量。因此,未来研究需进一步关注不同形态硒在土壤-根际-植株界面的跨界面迁移过程及其环境调控机制,为富硒农业生产、粮食营养安全与公众健康保障提供理论基础与技术支撑。

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Cite This Study

Yang et al. (2026) studied this question.

synapsesocial.com/papers/69b64c67b42794e3e660dbe3https://doi.org/10.1360/csb-2025-5915
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