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摘要翻译：
这项工作是对影响金属吸收的主要参数之间的相互关系的研究。通过对油菜幼苗对Ni(II)胁迫的宏观生理响应，研究了生长介质中金属浓度Cs、植物吸收金属浓度Cp和植物总生物量M与植物修复效率的关系。阶乘生长实验将琼脂凝胶中的Ni(II)浓度和日光量子(DLQ)作为自变量。观测结果包括根系和全株Ni毒力的光增强证据，地上部质量指数可能是竹荪地上部金属吸收的指标，地上部Cp随Cs的对数变化，地上部M随Cp的幂律关系。这些观察的总和表明，对于金属积累菌B.juncea来说，就其积累镍的能力而言，植物的整体代谢性质是重要的；生物量的快速增长和高金属浓度能力都不利于从培养基中去除高质量的金属，但中等光合驱动生物量增长和中等金属浓度的植物表现出从培养基中去除最大质量金属的能力。讨论了这些观测结果在植物修复工程中的意义，即在同一植物中同时最大限度地增加Cp和M。
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英文标题：
《The Light Quanta Modulated Physiological Response of Brassica Juncea
Seedlings Subjected to Ni(II) Stress》
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作者：
N. Dasgupta-Schubert (UMSNH), S. Alexander (SWU), L. Sommer (SWU), T.
Whelan (UTPA), R. Alfaro Cuevas Villanueva (UMSNH), M. E. Mendez Lopez
(UMSNH), M. W. Persans (UTPA)
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最新提交年份：
2007
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分类信息：
一级分类：Quantitative Biology 数量生物学
二级分类：Other Quantitative Biology 其他定量生物学
分类描述：Work in quantitative biology that does not fit into the other q-bio classifications
不适合其他q-bio分类的定量生物学工作
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英文摘要：
This work is a study of the inter-relationship between parameters that principally affect metal up-take in the plant. The relationships between the concentration of metal in the growth medium, Cs, the concentration of metal absorbed by the plant, Cp, and the total biomass achieved, M, all of which are factors relevant to the efficiency of phytoremediation of the plant, have been investigated via the macro-physiological response of Brassica juncea seedlings to Ni(II) stress. The factorial growth experiments treated the Ni(II) concentration in the agar gel and the diurnal light quanta (DLQ) as independently variable parameters. Observations included the evidence of light enhancement of Ni toxicity at the root as well as at the whole plant level, the shoot mass index as a possible indicator of shoot metal sequestration in B. juncea, the logarithmic variation of Cp with Cs and the power-law dependence of M on Cp. The sum total of these observations indicate that for the metal accumulator B. juncea with regard to its capacity to accumulate Ni, the overall metabolic nature of the plant is important; neither rapid biomass increase nor a high metal concentration capability favor the removal of high metal mass from the medium, but rather the plant with the moderate photosynthetically driven biomass growth and moderate metal concentrations demonstrated the ability to remove the maximum mass of metal from the medium. The implications of these observations in the context of the perceived need in phytoremediation engineering to maximize Cp and M simultaneously in the same plant, are discussed.
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PDF链接：
https://arxiv.org/pdf/0706.0349
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