Increased cadmium and lead uptake of a cadmium hyperaccumulator tomato by cadmium-resistant bacteria

被引：118

作者：

He, Lin-Yan ^{[1
]}

Chen, Zhao-Jin ^{[1
]}

Ren, Gai-Di ^{[1
]}

Zhang, Yan-Feng ^{[1
]}

Qian, Meng ^{[1
]}

Sheng, Xia-Fang ^{[1
]}

机构：

[1] Nanjing Agr Univ, MOA Key Lab Microbiol Engn Agr Environm, Coll Life Sci, Nanjing 210095, Peoples R China

来源：

ECOTOXICOLOGY AND ENVIRONMENTAL SAFETY | 2009年 / 72卷 / 05期

关键词：

Cd-resistant bacteria; Characterization; Solubilization of metals; Cd; Pb; Phytoextraction; Cd-hyperaccumulator tomato; GROWTH-PROMOTING BACTERIA; HEAVY-METAL ACCUMULATION; PLANT-GROWTH; INDIAN MUSTARD; RHIZOSPHERE-BACTERIA; CONTAMINATED SOIL; BRASSICA-JUNCEA; ALYSSUM-MURALE; ORGANIC-ACIDS; WINTER-WHEAT;

D O I：

10.1016/j.ecoenv.2009.03.006

中图分类号：

X [环境科学、安全科学];

学科分类号：

08 ; 0830 ;

摘要：

Two cadmium (Cd)-resistant strains Pseudomonas sp. RJ10 and Bacillus sp. RJ16 were investigated for their effects on the soil Cd and lead (Pb) solubilization and promotion of plant growth and Cd and Pb uptakes of a Cd-hyperaccumulator tomato. In the heavy metal-contaminated inoculated soil, the CaCl2-extractable Cd and Pb were increased by 58-104% and 67-93%, respectively, compared to the uninoculation control. The bacteria produced indole acetic acid, siderophore and 1-aminocyclopropane-1-carboxylate deaminase. Root elongation assay conducted on tomato under gnotobiotic conditions demonstrated increase in root elongation of inoculated tomato seedlings compared to the control plants. An increase in Cd and Pb contents of above-ground tissues varied from 92% to 113% and from 73% to 79% in inoculated plants growing in heavy metal-contaminated soil compared to the uninoculation control, respectively. These results show that the bacteria could be exploited for bacteria enhanced-phytoextraction of Cd- and Pb-polluted soils. (C) 2009 Elsevier Inc. All rights reserved.

引用

页码：1343 / 1348

页数：6