Bioaccumulation, subcellular distribution and chemical forms of yttrium in rice seedling
来源期刊:Journal of Rare Earths2018年第3期
论文作者:Shengnan Zheng Caiyun Zhang Kailun Shi Jinxiao Wang Guanjun Sun Qiaochu Hu Fengyun Zhao Xue Wang
文章页码:331 - 336
摘 要:Yttrium(Y) accumulation in soil is a serious environment problem in China. To understand the mechanisms involved in Y tolerance and detoxification in rice seedling, the bioaccumulation, subcellular distribution, and chemical forms of Y was investigated in the present study. The results show that the content of Y both in roots and shoots increases with the increasing concentration of Y, and a large amount of Y is stored in roots. Subcellular distribution of Y in rice indicates that the majority of Y is bound to cell wall. Meanwhile, various chemical forms of Y is absorbed by rice. The greatest amount of Y is extracted by 2% hydrate acetic acid(HAc) and 0.6 mol/L HCl(particularly 2% HAc), which indicates that most of Y is combined with un-dissolved phosphate and oxalate(particularly phosphate). Cluster analysis, based on Y abundance levels, reveals the relationship between Y distribution patterns and chemical forms. Our results imply that Y forming of precipitates with phosphate(and/or oxalate) and depositing in the cell wall may be a key strategy for Y detoxicity and tolerance in rice.
Shengnan Zheng,Caiyun Zhang,Kailun Shi,Jinxiao Wang,Guanjun Sun,Qiaochu Hu,Fengyun Zhao,Xue Wang
School of Life Sciences,Shandong University of Technology
摘 要:Yttrium(Y) accumulation in soil is a serious environment problem in China. To understand the mechanisms involved in Y tolerance and detoxification in rice seedling, the bioaccumulation, subcellular distribution, and chemical forms of Y was investigated in the present study. The results show that the content of Y both in roots and shoots increases with the increasing concentration of Y, and a large amount of Y is stored in roots. Subcellular distribution of Y in rice indicates that the majority of Y is bound to cell wall. Meanwhile, various chemical forms of Y is absorbed by rice. The greatest amount of Y is extracted by 2% hydrate acetic acid(HAc) and 0.6 mol/L HCl(particularly 2% HAc), which indicates that most of Y is combined with un-dissolved phosphate and oxalate(particularly phosphate). Cluster analysis, based on Y abundance levels, reveals the relationship between Y distribution patterns and chemical forms. Our results imply that Y forming of precipitates with phosphate(and/or oxalate) and depositing in the cell wall may be a key strategy for Y detoxicity and tolerance in rice.
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