State Key Laboratory of Environmental Geochemistry, Institute of Geochemistry, Chinese Academy of Sciences, Guiyang 550081, China; Guizhou Academy of Tobacco Science, 550081 Guiyang, China; University of Chinese Academy of Sciences, Beijing 100049, China.
State Key Laboratory of Environmental Geochemistry, Institute of Geochemistry, Chinese Academy of Sciences, Guiyang 550081, China; University of Chinese Academy of Sciences, Beijing 100049, China.
J Hazard Mater. 2022 Jan 15;422:126876. doi: 10.1016/j.jhazmat.2021.126876. Epub 2021 Aug 10.
Selenium (Se), which can be both hazardous and beneficial to plants, animals and humans, plays a pivotal role in regulating soil-plant-human ecosystem functions. The biogeochemical behavior of Se and its environmental impact on the soil-plant-human system has received broad attention in the last decades. This review provides a comprehensive understanding of Se biogeochemistry in the soil-plant-human system. The speciation, transformation, bioavailability as well as the beneficial and hazardous effects of Se in the soil-plant-human system are summarized. Several important aspects in Se in the soil-plant-human system are detailed mentioned, including (1) strategies for biofortification in Se-deficient areas and phytoremediation of soil Se in seleniferous areas; (2) factors affecting Se uptake and transport by plants; (3) metabolic pathways of Se in the human body; (4) the interactions between Se and other trace elements in plant and animals, in particular, the detoxification of heavy metals by Se. Important research hotspots of Se biogeochemistry are outlined, including (1) the coupling of soil microbial activity and the Se biogeochemical cycle; (2) the molecular mechanism of Se metabolic in plants and animals; and (3) the application of Se isotopes as a biogeochemical tracer in research. This review provides up-to-date knowledge and guidelines on Se biogeochemistry research.
硒（Se）对植物、动物和人类既有危害又有好处，在调节土壤-植物-人类生态系统功能方面发挥着关键作用。过去几十年，硒的生物地球化学行为及其对土壤-植物-人类系统的环境影响受到了广泛关注。本综述全面了解了土壤-植物-人类系统中的硒生物地球化学。总结了硒在土壤-植物-人类系统中的形态、转化、生物可利用性以及有益和有害影响。详细提到了土壤-植物-人类系统中硒的几个重要方面，包括（1）在缺硒地区进行生物强化的策略和在富硒地区进行土壤硒的植物修复；（2）影响植物吸收和转运硒的因素；（3）人体中硒的代谢途径；（4）硒与植物和动物中其他微量元素之间的相互作用，特别是硒对重金属的解毒作用。概述了硒生物地球化学的重要研究热点，包括（1）土壤微生物活性与硒生物地球化学循环的耦合；（2）植物和动物中硒代谢的分子机制；（3）硒同位素作为生物地球化学示踪剂在研究中的应用。本综述提供了有关硒生物地球化学研究的最新知识和指导。
