Increased cadmium and lead uptake of a cadmium hyperaccumulator tomato by cadmium-resistant bacteria
Increased cadmium and lead uptake of a cadmium hyperaccumulator tomato by cadmium-resistant bacteria
复制标题
抗镉细菌增加镉超富集番茄对镉和铅的吸收
DOI：
10.1016/j.ecoenv.2009.03.006
复制
发表时间：
2009-07-01
影响因子：
6.8
通讯作者：
Sheng, Xia-Fang
中科院分区：
文献类型：
--
作者：
He, Lin-Yan;Chen, Zhao-Jin;Sheng, Xia-Fang
两种抗镉 (Cd) 菌株假单胞菌属 sp. RJ10 和芽孢杆菌属。研究了 RJ16 对土壤镉和铅 (Pb) 溶解、促进植物生长以及镉超累积番茄吸收镉和铅的影响。在重金属污染的接种土壤中，与未接种对照相比，CaCl2可提取的Cd和Pb分别增加了58-104%和67-93%。该细菌产生吲哚乙酸、铁载体和1-氨基环丙烷-1-羧酸脱氨酶。在限生条件下对番茄进行的根伸长测定表明，与对照植物相比，接种的番茄幼苗的根伸长有所增加。与未接种对照相比，在重金属污染土壤中生长的接种植物的地上组织中镉和铅含量分别增加了 92% 至 113% 和 73% 至 79%。这些结果表明，该细菌可用于镉和铅污染土壤的细菌强化植物提取。 (C) 2009 Elsevier Inc. 保留所有权利。
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.