The beneficial effect of aluminium and the role of citrate in Al accumulation in Melastoma malabathricum.
The beneficial effect of aluminium and the role of citrate in Al accumulation in Melastoma malabathricum.
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DOI：
10.1111/j.1469-8137.2004.01261.x
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发表时间：
2004-12
期刊：
影响因子：
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通讯作者：
Toshihiro Watanabe;S. Jansen;M. Osaki
中科院分区：
文献类型：
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作者：
Toshihiro Watanabe;S. Jansen;M. Osaki
* 在这里，我们研究了铝 (Al) 对积铝植物野牡丹 (Melastoma malabathricum) 发育的有益影响。 * M. malabathricum 幼苗在含有 0.5 mM Al 的营养液中培养，并与大麦 (Hordeum vulgare) 进行比较。此外，将M. malabathricum的根分为一部分在营养液中生长，另一部分在钙溶液中生长。将 Al (0.5 mM) 添加到任一溶液中。 * Al 诱导的根系活性改善有助于 M. malabathricum 的生长增强。没有营养的铝暴露不会增加根系生长和叶子中铝的积累。然而，有益的效果是由铝和营养素的结合引起的。 * 我们认为，如果没有营养，根部就无法合成将铝输送到叶子所需的足够量的柠檬酸盐。植物组织中的高铝含量和/或铝与根细胞质外体中特定营养元素的相互作用似乎对于发挥铝的有益作用至关重要。
* Here we investigated the beneficial effect of aluminium (Al) on the development of the Al accumulating plant Melastoma malabathricum. * Seedlings of M. malabathricum were cultivated in a nutrient solution containing 0.5 mM Al and compared with barley (Hordeum vulgare). In addition, roots of M. malabathricum were divided into one part growing in a nutrient solution, and the other part growing in a calcium solution. Al (0.5 mM) was applied to either solution. * Al-induced improvements of the root activity contributed to a growth enhancement in M. malabathricum. Al exposure without nutrients did not increase root growth and Al accumulation in the leaves. The beneficial effect, however, was induced by the combination of Al and nutrients. * We suggest that without nutrients roots are not able to synthesize an adequate amount of citrate that is required for transporting Al to the leaves. High Al levels in the plant tissues and/or an interaction of Al with particular nutrient elements in the apoplast of root cells appear to be essential to exert the beneficial effect of Al.