Heavy metal translocation and accumulation in iron plaques and plant tissues for 32 hybrid rice (Oryza sativa L.) cultivars
Heavy metal translocation and accumulation in iron plaques and plant tissues for 32 hybrid rice (Oryza sativa L.) cultivars
复制标题
DOI：
10.1007/s11104-014-2268-5
复制
发表时间：
2014
期刊：
影响因子：
4.9
通讯作者：
Hang Zhou;Min Zeng;Xin Zhou;B. Liao;Pei-qin Peng;Miao Hu;Wei Zhu;Yu-Jun Wu;Zi-Jin Zou
中科院分区：
文献类型：
--
作者：
Hang Zhou;Min Zeng;Xin Zhou;B. Liao;Pei-qin Peng;Miao Hu;Wei Zhu;Yu-Jun Wu;Zi-Jin Zou
背景与目的水稻（Oryza sativa L.）种植在重金属污染土壤上的植物是有毒元素进入食物链的来源，从而对人类健康构成威胁。本研究的主要目的是研究水稻品种间铁膜和水稻组织对重金属的吸收、转运和积累的差异。铅，镉，铜，锌在水稻组织（根，秸秆，谷壳，糙米）和水稻根表铁斑块的浓度measured. Results 32个水稻品种的铅，镉，铜，锌的耐受性，浓度和积累的显着差异。而三系杂交稻和两系杂交稻的Pb、Cd、Cu和Zn含量差异不显著。铁膜中Pb含量与水稻根中Pb含量呈显著正线性相关，Cd、Cu含量与水稻根中Cd、Cu含量呈显著负线性相关。糙米中重金属含量与转运因子TFhb（谷壳-糙米）和TFsh（稻草-谷壳）呈显著正相关。结论铁膜在介导重金属进入水稻根系中起重要作用，糙米中重金属的积累与谷壳和稻草的转运能力有关，而与根系的转运能力无关。
Background and aimsRice (Oryza sativaL.) planted on heavy metal contaminated soil is a source of toxic elements entering the food chain and thereby posing a threat to human health. The main objective of this study was to investigate heavy metals uptake, translocation, and accumulation differences in iron plaque and rice tissues among the rice cultivars.MethodsIn the present study, 32 hybrid rice cultivars were cultured on heavy metal contaminated paddy soil. Pb, Cd, Cu, and Zn concentrations in rice tissues (root, straw, husk, and brown rice) and in the iron plaques on rice root surfaces were measured.ResultsSignificant differences of Pb, Cd, Cu, and Zn tolerance, concentrations and accumulation in 32 rice cultivars were observed. However, no significant difference was observed in concentrations of Pb, Cd, Cu, and Zn in two-line hybrid rice and three-line hybrid rice. The concentrations of Pb in iron plaques were significantly positive linearly correlated with concentrations of Pb in rice roots, and concentrations of Cd and Cu were significantly negative linearly correlated with Cd and Cu in rice roots. The concentrations of heavy metal in brown rice were significantly positively correlated with the translocation factors TFhb(from husk to brown rice) and TFsh(from straw to husk).ConclusionsIt indicated that iron plaque plays an important role in mediating heavy metal entering into rice roots, and heavy metal accumulation in brown rice was related to its ability to transfer in the husk and straw rather than the root.