Identification of rice cultivars with low brown rice mixed cadmium and lead contents and their interactions with the micronutrients iron, zinc, nickel and manganese
Identification of rice cultivars with low brown rice mixed cadmium and lead contents and their interactions with the micronutrients iron, zinc, nickel and manganese
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低糙米混合镉、铅含量水稻品种鉴定及其与微量营养素铁、锌、镍、锰的相互作用
DOI：
10.1016/s1001-0742(11)60972-8
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发表时间：
2012-01-01
影响因子：
6.9
通讯作者：
Ye, Zhihong
中科院分区：
文献类型：
--
作者：
Li, Bing;Wang, Xun;Ye, Zhihong
矿区的稻田通常受到混合有毒重金属的混合物（例如，镉和铅的铅/锌矿山）。然而，以往的研究水稻品种筛选有效的金属排斥大多集中在个别金属，并已进行盆栽试验或水培溶液条件下。本研究在Cd和Pb污染的田间条件下，鉴定了Cd和Pb积累量均较低的水稻品种，并研究了Cd和Pb与微量营养元素Fe、Zn、Mn和Ni的相互作用。供试32个水稻品种糙米中Cd（0.06-0.59 mg/kg）和Pb（0.25-3.15 mg/kg）含量差异显著，微量营养元素含量差异也相似。铁和锰的浓度显着下降，检测到镉浓度的增加，并在铁，锰和镍的显着升高，随着铅浓度的增加。Cd和Ni也显示了类似的结果。结果表明，五丰优2168、天优196和贵农占是糙米镉、铅含量低、微量元素和产量高的组合。研究结果表明，在水稻生产中，选育低Cd、Pb混合毒害元素含量、高微量元素含量沿着高产量的水稻品种是可能的，从而保证了水稻的食用安全和品质。
Paddy fields in mining areas are usually co-contaminated by a cocktail of mixed toxic heavy metals (e.g., Cd and Pb in Pb/Zn mines). However, previous studies on rice cultivars screened for effective metal exclusion have mostly focused on individual metals, and have been conducted under pot-trial or hydroponic solution conditions. This study identified rice cultivars with both low Cd and Pb accumulation under Cd- and Pb-contaminated field conditions, and the interactions of the toxic elements Cd and Pb with the micronutrient elements Fe, Zn, Mn and Ni were also studied. Among 32 rice cultivars tested, there were significant differences in Cd (0.06-0.59 mg/kg) and Pb (0.25-3.15 mg/kg) levels in their brown rice, and similar results were also found for the micronutrient elements. Significant decreases in concentrations of Fe and Mn were detected with increasing Cd concentrations and a significant elevation in Fe, Mn and Ni with increasing Pb concentrations. A similar result was also shown by Cd and Ni. Three cultivars were identified with a combination of low brown rice Cd and Pb, high micronutrient and grain yield (Wufengyou 2168, Tianyou 196 and Guinongzhan). Present results suggest that it is possible to breed rice cultivars with low mixed toxic element (Cd, Pb) and high micronutrient contents along with high grain yields, thus ensuring food safety and quality.