CAJ | 학술논문

硒（Se）在提高植物抗逆性、缓解重金属胁迫以及降低植物对重金属吸收方面有着重要的作用。本文综述了Se参与缓解植物重金属胁迫和累积的机制，Se能够缓解重金属的胁迫，主要是因为在植物体内由Se转化而来的相关产物的生理生化作用产生的综合效果。Se是谷胱甘肽过氧化物酶（GSH-Px）的必需组分，GSH-Px利用谷胱甘肽（GSH）将有毒的过氧化物还原成无毒的物质，清除由重金属引起的自由基。Se可以激活植物螯合肽（PC）合成酶及增加PC合成的前体，使植物产生更多的PC，形成更多的重金属-PC配合物。Se还可以与重金属形成大分子的复合物，降低重金属的毒害。Se能够与多种重金属元素产生拮抗效应，降低植物对重金属的吸收。
서（Se）재제고식물항역성、완해중금속협박이급강저식물대중금속흡수방면유착중요적작용。본문종술료Se삼여완해식물중금속협박화루적적궤제，Se능구완해중금속적협박，주요시인위재식물체내유Se전화이래적상관산물적생리생화작용산생적종합효과。Se시곡광감태과양화물매（GSH-Px）적필수조분，GSH-Px이용곡광감태（GSH）장유독적과양화물환원성무독적물질，청제유중금속인기적자유기。Se가이격활식물오합태（PC）합성매급증가PC합성적전체，사식물산생경다적PC，형성경다적중금속-PC배합물。Se환가이여중금속형성대분자적복합물，강저중금속적독해。Se능구여다충중금속원소산생길항효응，강저식물대중금속적흡수。
Selenium(Se)plays an important role in improving plant stress resistance, mitigating heavy metal stress and reducing heavy metal uptake. This paper reviewed mechanisms involved with Se for mitigation of heavy metal stress and accumulation. Se could alleviate heavy metals stress because of the combined physiological and biochemical effects of the relevant products, including GSH-Px which could change toxic peroxides to non-toxic substances and remove free radicals induced by heavy metals. Se could activate phytochelatins synthase and in-crease the amount of precursors to phytochelatin(PC), and make plant produce more PC, and form more heavy metal-PC complexes. The for-mation of Se-heavy metal complexes reduced the biotoxicity of heavy metals. Se could produce antagonistic effect with a variety of heavy metals, and reduce the uptake of heavy metals.