Rhizosphere bacteria enhance the accumulation of selenium and mercury in wetland plants

被引：165

作者：

de Souza, MP ^{[1
]}

Huang, CPA ^{[1
]}

Chee, N ^{[1
]}

Terry, N ^{[1
]}

机构：

[1] Univ Calif Berkeley, Dept Plant & Microbial Biol, Berkeley, CA 94720 USA

来源：

PLANTA | 1999年 / 209卷 / 02期

关键词：

bacteria; mercury; Polypogon; rhizosphere; Scirpus; selenium;

D O I：

10.1007/s004250050630

中图分类号：

Q94 [植物学];

学科分类号：

071001 ;

摘要：

The role of rhizosphere bacteria in facilitating Se and Hg accumulation in two wetland plants, saltmarsh bulrush (Scirpus robustus Pursh) and rabbit-foot grass (Polypogon monspeliensis (L.) Desf.), was studied. Ampicillin-amended plants (i.e., with inhibited rhizosphere bacteria) supplied with Na2SeO4 or HgCl2 had significantly lower concentrations of Se and Hg, respectively, in roots than plants without ampicillin. These results were confirmed by inoculating axenic saltmarsh bulrush plants with bacteria isolated from the rhizosphere of plants collected from the field; these plants accumulated significantly more Se and Hg compared to axenic controls. Therefore, rhizosphere bacteria can increase the efficiency of Se and Hg phytoremediation by promoting the accumulation of Se and Hg in tissues of wetland plants.

引用

页码：259 / 263

页数：5

共 24 条

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