The transportation and accumulation of arsenic, cadmium, and phosphorus in 12 wheat cultivars and their relationships with each other.
The transportation and accumulation of arsenic, cadmium, and phosphorus in 12 wheat cultivars and their relationships with each other.
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DOI：
10.1016/j.jhazmat.2015.06.009
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发表时间：
2015-12
影响因子：
13.6
通讯作者：
G. Shi;Shun Zhu;Sheng Nan Bai;Yan Xia;L. Lou;Q. Cai
中科院分区：
文献类型：
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作者：
G. Shi;Shun Zhu;Sheng Nan Bai;Yan Xia;L. Lou;Q. Cai
通过盆栽试验，研究了12个小麦品种对As、Cd和P吸收、积累和运转的差异及其相互关系。小麦籽粒、秸秆和根系中As、Cd和P含量在12个小麦品种间差异显著（p< 0.05）。籽粒砷含量与秸秆和根系砷含量及植株总砷含量均不相关，但与砷转运因子（TFs）显著相关（p< 0.05），TFs（谷物/根）和TFs（谷物/秸秆）。小麦籽粒中Cd含量与全Cd含量和TFs（Grain/Straw）呈正相关，籽粒中P含量与秸秆和根系P含量呈正相关，小麦籽粒中As和Cd含量与秸秆和籽粒中P含量呈正相关。与As相比，Cd更容易向籽粒转运，而穗轴在保证这一差异方面起着关键作用。根系中As和Cd含量呈显著正相关，但籽粒中As和Cd含量无显著相关性。缺乏粮食As和Cd之间的关系表明，选择品种的可能性小As和Cd积累发生在小麦籽粒。
Pot experiments were conducted to investigate the difference in arsenic (As), cadmium (Cd), and phosphorus (P) uptake, accumulation, and translocation among 12 wheat cultivars and their relationships with each other in soil “naturally” contaminated with both As and Cd. As, Cd, and P concentrations in wheat grain, straw, and root differed significantly (p< 0.05) among the 12 wheat cultivars. The grain As concentration was not correlated with straw and root As, or the total As content in plants, but was significantly (p< 0.05) correlated with As translocation factors (TFs), i.e., TFs(Grain/Root)and TFs(Grain/Straw). The grain Cd concentration was positively correlated with the total Cd content and TFs(Grain/Straw).The grain P concentration was positively correlated with straw and root P. Both As and Cd concentrations in wheat grains were correlated with P in wheat straw and grain. Compared with As, Cd was more easily transported to the wheat grain, and the rachis played a key role in ensuring this difference. A significant positive correlation was observed between root As and Cd, but no significant relationship was detected between grain As and Cd concentrations. The lack of a relationship between grain As and Cd suggests the possibility of selecting cultivars in which little As and Cd accumulation occurs in the wheat grain.