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当前位置: 首页 > 文章 > 胁迫和对照条件下水稻品种铅积累的差异 农业环境科学学报 2009,28 (05) 109-113
Position: Home > Articles > Difference of Accumulation in Rice Cultivars Under Pb Stress and the Control Journal of Agro-Environment Science 2009,28 (05) 109-113

胁迫和对照条件下水稻品种铅积累的差异

作  者：
陈志德;仲维功;王军;杨杰;张永春
单  位：
江苏省农业科学院农业资源与环境研究所;江苏省农业科学院粮食作物研究所
关键词：
水稻;铅胁迫;铅积累
摘  要：
为选育籽粒中对Pb低积累或低吸收水稻品种提供依据,本研究采用盆栽试验方法,比较了不同类型水稻品种及植株不同部位在胁迫和对照条件下对Pb的吸收积累特性。结果表明,供试品种不同部位中Pb含量的变异系数较高,变幅在18.34%～35.57%。不同部位中Pb的含量差异明显,根系对Pb具有较强的积累能力。胁迫条件下,根系中Pb的平均含量为287.616mg·kg-1,约是茎叶和糙米含量的58倍和1267倍;对照条件下,根系中Pb的平均含量为9.078mg·kg-1,约是茎叶和糙米含量的3倍和50倍;胁迫条件下根系中Pb的含量是对照的36.34倍,而茎叶和糙米分别是对照的1.65倍和1.36倍。不同品种对Pb的积累能力存在显著差异,同一品种在胁迫与对照条件下对Pb的含量也存在明显差异,其中,宁54146对Pb胁迫较敏感。相关分析表明,对照和胁迫条件下,植株不同部位中Pb的含量均不存在相关性。
译  名：
Difference of Accumulation in Rice Cultivars Under Pb Stress and the Control
作  者：
CHEN Zhi-de1, ZHONG Wei-gong1, WANG Jun1, YANG Jie1, ZHANG Yong-chun2 (1.Institute of Food Crops, Jiangsu Academy of Agricultural Science, Nanjing 210014, China; 2. Institute of Agricultural Resources and Environment, Jiangsu Academy of Agricultural Sciences, Nanjing 210014, China)
关键词：
rice(Oryza sativa L.); Pb stress; Pb accumulation
摘  要：
To evaluate rice genotypes with low Pb uptaking and low Pb accumulation in grains, for breeding programme, Pb accumulation in different plant parts was tested in a pot experiment by using various types of rice cultivars under Pb stress and the control conditions. The results showed that Pb accumulation differed significantly in various plant parts, varied from 18.34% to 35.57%. The average accumulation of Pb in the roots was 287.616 mg·kg-1 under Pb stress, which was approximately 58 times and 1 267 times higher than that in the shoots and in the brown rice, respectively. Meanwhile, under the control conditions, the average Pb content in the roots was 9.078 mg·kg-1, 3 times and 50 times higher than that in the shoots and in the brown rice. It indicated that roots had good capacity of uptaking Pb under both Pb stress and the control. Under stress, on average, Pb amount in the roots, in the shoots and in the brown rice were 36.34 times, 1.65 times and 1.36 times higher than that in respective plant parts under the control. There was a significant difference in Pb accumulation among rice cultivars . Ning 54146 was sensitive to Pb stress. Pb accumulation in the roots, shoots and the brown rice was not significant correlated in both Pb stress and control conditions.

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