| 小麦苗期吸收和积累镉能力的品种间差异 |
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| 引用本文： | 刘艳阳,黄萍霞,马克强,戴其根,张洪程.小麦苗期吸收和积累镉能力的品种间差异[J].农业环境保护,2011(10):1939-1945. |
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| 作者姓名： | 刘艳阳 黄萍霞 马克强 戴其根 张洪程 |
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| 作者单位： | 扬州大学农学院江苏省作物遗传生理重点实验室,江苏扬州225009 |
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| 基金项目： | 江苏省高校自然科学基础研究项目（06KJB210134） |
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| 摘 要： | 采用水培方法,研究了25个小麦品种苗期对镉的吸收和积累的差异,以期筛选具有Cd低积累潜力的小麦品种。结果表明,Cd对地上部干物重有显著抑制作用,对地下部干物重影响因品种而异,对春性品种有抑制作用,对半冬性小麦品种有促进作用。小麦对镉的吸收、积累、耐性指数以及镉运转效率有极显著的品种间差异。在1μmol·L-1的Cd处理下,根系镉含量为33.1～139.7mg·kg-1,积累量为2.12～9.78μg·plant-1,地上部镉含量为3.6～15.3mg·kg-1,积累量为0.45～1.44μg·plant-1,表明小麦体内的Cd主要积累在地下部而非地上部。因此,以地上部Cd积累量为筛选指标,将25个小麦品种划分为Cd高积累型、Cd中积累型、Cd低积累型。
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| 关 键 词： | 小麦 苗期 镉吸收 镉积累 品种间差异 |
Variations of Cd Absorption and Accumulation in Different Wheat Cultivars at Seedling Stage |
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| LIU Yan-yang,HUANG Ping-xia,MA Ke-qiang,DAI Qi-gen,ZHANG Hong-cheng.Variations of Cd Absorption and Accumulation in Different Wheat Cultivars at Seedling Stage[J].Agro-Environmental Protection,2011(10):1939-1945. |
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| Authors: | LIU Yan-yang HUANG Ping-xia MA Ke-qiang DAI Qi-gen ZHANG Hong-cheng |
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| Institution: | (College of Agronomy/Key Laboratory of Crop Genetic and Physiology of Jiangsu Province,Yangzhou University,Yangzhou 225009,China) |
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| Abstract: | The differences of Cd absorption and accumulation in 25 wheat cultivars at seedling stage were studied under hydroponic condition in order to screen the low Cd accumulation type of wheat cultivars.The results showed that these wheat cultivars had significant difference in absorption,accumulation,tolerance index,and transport efficiency of Cd when plants grown in water contaminated with 1 μmol·L-1 Cd.Cd had significant inhibitory effect on the shoot dry weight of wheat cultivars while the Cd effect on the root dry weight depended on the cultivars which decreasing the root dry weight in spring wheat cultivars but increasing the root dry weight in half-winter wheat cultivars.The Cd content in root varied from 33.1 to 139.7 mg·kg-1,the Cd accumulation in root varied from 2.12 to 9.78 μg·plant-1,the Cd content in shoot varied from 3.6 to 15.3 mg·kg-1,the Cd accumulation in shoot varied from 0.45 to 1.44 μg·plant-1,which showed that Cd was mainly accumulated in root not in shoot.Therefore,Cd accumulation in shoot could be adapted as screening indexes.And the 25 wheat cultivars were classified into three types：high Cd accumulation type,mean Cd accumulation type and low Cd accumulation type. |
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| Keywords: | wheat seedling stage Cd absorption Cd accumulation cultivar variation |
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