Influence of root temperature on uptake and accumulation of Ni and Co in potato
Influence of root temperature on uptake and accumulation of Ni and Co in potato
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DOI：
10.1078/0176-1617-00547
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发表时间：
2002
影响因子：
4.3
通讯作者：
M. Baghour;D. Moreno;J. Hernández;N. Castilla;L. Romero
中科院分区：
文献类型：
--
作者：
M. Baghour;D. Moreno;J. Hernández;N. Castilla;L. Romero
研究了根温对马铃薯不同器官（根、块茎、茎和叶）中Ni和Co含量和累积的影响。变种飞蓬属植物。在相同条件下，叶和根的脲酶活性的反应也进行了测定。采用四种不同的聚乙烯塑料覆盖物（T1：透明; T2：白色; T3：共挤出黑色+白色; T4：黑色），使用未覆盖的植物作为对照（T0）。不同的处理对平均根区温度（T0 = 16 °C，T1 = 20 °C，T2 = 23 °C，T3 = 27 °C和T4 = 30 °C）有显著影响，并且在马铃薯器官中的Ni和Co分布中引起显著不同的响应，因为T3（27 °C）在根、叶和块茎中产生更高浓度的Ni。T1（20 °C）在叶和根中记录了最大的Co浓度，而T3在块茎中给出了较高的Co浓度。块茎是生物量最高的器官，也是Co和Ni积累量最高的器官。就脲酶活性作为Ni生物指示剂的响应而言，T1的根系脲酶活性较高，而T3和T4的叶片脲酶活性较高，与较高的叶片Ni浓度相一致。这是必要的，以确定的相关性和控制的热制度的土壤，以优化植物提取（植物修复）的元素。
Summary The impact of root temperature on Ni and Co concentration and accumulation has been studied in organs (roots, tubers, stems and leaves) of Solanum tuberosum L. var. Spunta plants. The response of foliar- and root-urease activity was also determined under the same conditions. Four different polyethylene plastic covers were employed (T1: transparent; T2: white; T3: coextruded black+white; T4: black), using uncovered plants as control (T0). The different treatments had a significant effect on mean root zone temperatures (T0 = 16 °C, T1 = 20 °C, T2 = 23 °C, T3 = 27 °C and T4 = 30 °C) and induced a significantly different response in the Ni and Co distribution in potato organs, since T3 (27 °C) gave higher concentrations of Ni in roots, leaves and tubers. The T1 (20 °C) registered the greatest Co concentration in leaves and roots, while T3 gave higher Co concentrations in tubers. The tubers proved to be the organs with the highest biomass and also the highest Co and Ni accumulation. With respect to the response of the urease activity as Ni-bioindicator, the root urease activity was higher in T1, whereas the leaf urease activity was higher in T3 and T4, coinciding with higher concentrations of leaf Ni. It is necessary to ascertain the relevance and control of the thermal regime of the soil to optimize the phytoextraction (phytoremediation) of elements.