Reduction of cadmium translocation from roots to shoots in eggplant (Solanum melongena) by grafting onto Solanum torvum rootstock
Reduction of cadmium translocation from roots to shoots in eggplant (Solanum melongena) by grafting onto Solanum torvum rootstock
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DOI：
10.1111/j.1747-0765.2008.00269.x
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发表时间：
2008-08-01
影响因子：
2
通讯作者：
Nishihara, Eiji
中科院分区：
文献类型：
--
作者：
Arao, Tomohito;Takeda, Hiroyuki;Nishihara, Eiji
日本的一项调查显示，约7%的茄子果实中镉（Cd）浓度高于水果蔬菜的国际限值。本研究旨在建立一种降低茄子果实中镉含量的方法。在镉污染土壤、未污染土壤和营养培养条件下，测定了不同砧木茄子体内镉含量。在镉污染土壤和未污染土壤中，与嫁接茄子相比，嫁接茄子可使茄子果实镉含量降低63-74%。S. torvum的产量约为S.全缘叶嫁接显著降低了Cd从根向地上部的转运。torvum。S. torvum也低于cv.森良2号（S. melongena）和cv. Daitarou（S.因此，镉从根到地上部的转运也减少了自根S。torvum植物。Cd浓度的测定结果表明，Cd浓度的变化与茎中木质部汁液中Cd浓度的变化有关。torvum是S.因此，Cd从根向地上部转运的减少可以通过Cd在根中的差异负荷来解释。我们开发了一种实用的降低茄子果实镉含量的方法。托弗砧木其低镉转运特性的机理有待进一步研究。torvum。
A Survey in Japan showed that approximately 7%, of eggplant fruits contain cadmium (Cd) concentrations above the international limit for fruiting vegetables. This study was conducted to develop a method to reduce Cd concentration in eggplant fruits. We determined Cd concentrations in eggplants grown oil different rootstocks in Cd-polluted soil, unpolluted soil and nutrient culture. Grafting onto Solanum torvum reduced eggplant fruit Cd concentrations by 63-74% in Cd-polluted soil and unpolluted soil compared with grafting onto Solanum melongena and Solanum integrifolium. Stem and leaf Cd concentrations of scions on S. torvum were approximately 30% of those on S. integrifolium, so Cd translocation from roots to shoots was apparently reduced in plants grafted onto S. torvum. Stern and leaf Cd concentrations of S. torvum were also lower than those of cv. Senryou2 (S. melongena) and cv. Daitarou (S. melongena); thus, Cd translocation from roots to shoots was also reduced in self-rooted S. torvum plants. The Cd concentration of xylem sap in stems of S. torvum was 22% of that in stems of S. melongena, so the reduced Cd translocation from root to shoot could be accounted for by differential loading of Cd into the xylem in roots. We have developed a practical method for reducing the Cd concentration of eggplant fruits by grafting onto S. torvum rootstock. Further investigation is needed to elucidate the mechanism responsible for the low Cd translocation characteristics of S. torvum.