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OALib Journal期刊
ISSN: 2333-9721
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巯基化合物在万寿菊镉解毒中的作用
Keywords: 镉,万寿菊,巯基化合物,谷胱甘肽,植物络合素
Abstract:
采用水培实验方法研究了万寿菊体内镉积累和解毒与巯基化合物含量的关系。万寿菊植株分别在镉浓度为0、0.1、0.5、2和8mg/L的营养液中暴露7d，测定了根、茎、叶中镉、非蛋白巯基(NPT)、半胱氨酸(Cys)、γ-谷氨酰半胱氨酸(γ-EC)、谷胱甘肽(GSH)和植物络合素(PCs)的含量。植物根、茎、叶中镉含量都随着镉暴露浓度的增加而增加。当溶液中镉浓度较低(0.1～2mg/L)时，茎叶中NPT、PCs、Cys和γ-EC含量随着镉浓度增加而增大；当镉浓度较高(8mg/L)时，茎叶中PCs含量迅速降
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