Hebei Key Lab of Power Plant Flue Gas Multi-Pollutants Control, Department of Environmental Science and Engineering, North China Electric Power University, Baoding 071003, China.
MOE Key Laboratory of Resources and Environmental Systems Optimization, College of Environmental Science and Engineering, North China Electric Power University, Beijing 102206, China.
Sci Total Environ. 2023 Jun 20;878:163203. doi: 10.1016/j.scitotenv.2023.163203. Epub 2023 Mar 31.
Iodine deficiency can cause thyroid disease, a serious health problem that has been affecting humans since several years. The biofortification of plants with iodine is an effective strategy for regulating iodine content in humans. In addition, radioiodine released into the atmosphere may contaminate terrestrial ecosystem along with dry or wet deposition and its accumulation in plants may cause exposure risks to humans via food chain. Recent progress in understanding the mechanisms related to iodine uptake, elementary speciation, dynamic transportation, nutritional role, and toxicity in plants is reviewed here. First, we introduced the iodine cycle in a marine-atmosphere-land system. The content and speciation of iodine in plants under natural conditions and biofortification backgrounds were also analyzed. We then discussed the mechanisms of iodine uptake and efflux by plants. The promotion or inhibition effects of iodine on plant growth were also investigated. Finally, the participation of radioiodine in plant growth and its safety risks along the food chain were evaluated. Furthermore, future challenges and opportunities for understanding the participation of iodine in plants have been outlined.
碘缺乏会导致甲状腺疾病，这是一个严重的健康问题，已经影响了人类多年。通过向植物中添加碘来实现生物强化是调节人体碘含量的有效策略。此外，大气中释放的放射性碘可能会随着干湿沉降而污染陆地生态系统，其在植物中的积累可能会通过食物链对人类造成暴露风险。本文综述了近年来在理解与植物中碘的吸收、基本形态、动态运输、营养作用和毒性相关的机制方面取得的进展。首先，我们介绍了海洋-大气-陆地系统中的碘循环。还分析了自然条件下和生物强化背景下植物中碘的含量和形态。然后，我们讨论了植物吸收和排出碘的机制。还研究了碘对植物生长的促进或抑制作用。最后，评估了放射性碘在植物生长中的参与及其沿食物链的安全风险。此外，还概述了未来理解碘在植物中参与的挑战和机遇。
