Inter- and intraspecific variations of cadmium accumulation of 13 leafy vegetable species in a greenhouse experiment.
Inter- and intraspecific variations of cadmium accumulation of 13 leafy vegetable species in a greenhouse experiment.
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DOI：
10.1021/jf0716432
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发表时间：
2007-10
影响因子：
6.1
通讯作者：
Junli Wang;W. Fang;Zhongyi Yang;Jiangan Yuan;Y. Zhu;Hui Yu
中科院分区：
文献类型：
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作者：
Junli Wang;W. Fang;Zhongyi Yang;Jiangan Yuan;Y. Zhu;Hui Yu
叶类蔬菜是最容易受到重金属污染的作物品种之一。研究了土壤镉胁迫（1.5和7.7 mg kg(-1)）下13种39个叶菜品种镉积累的种间和种内变化。两种Cd处理下，叶菜茎部生物量和Cd浓度的种内变化均显著大于种间变化，且品种组与种组之间的相关性更显著。这些结果表明，品种是筛选无污染叶类蔬菜的较可靠的分类群水平。应避免在不考虑种内变异的情况下筛选污染物低蓄积物种或其他类似的基于物种的概念。
Leafy vegetables are among the crop species that are most vulnerable to heavy metal pollution. This study investigated inter- and intraspecific variations of cadmium accumulation in 13 species with a total of 39 cultivars of leafy vegetables under two levels of soil Cd stress (1.5 and 7.7 mg kg (-1)). Intraspecific variations of shoot biomass and Cd concentration of the tested leafy vegetables were significantly larger than interspecific variations under both Cd treatments and were also more significantly correlated between two Cd stress levels when grouped by cultivar than grouped by species. These results indicate that cultivar is a more reliable taxa level for screening pollutant-safe leafy vegetables than species. Any screening for pollutant hypoaccumulator species, or other similar species-based concepts, without considering intraspecific variation should be avoided.