He Lin-Yan, Chen Zhao-Jin, Ren Gai-Di, Zhang Yan-Feng, Qian Meng, Sheng Xia-Fang
MOA Key Laboratory of Microbiological Engineering of Agricultural Environment, College of Life Science, Nanjing Agricultural University, Nanjing, People's Republic of China.
Ecotoxicol Environ Saf. 2009 Jul;72(5):1343-8. doi: 10.1016/j.ecoenv.2009.03.006. Epub 2009 Apr 14.
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 CaCl(2)-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.
研究了两株耐镉（Cd）菌株假单胞菌属RJ10和芽孢杆菌属RJ16对土壤中镉和铅（Pb）的溶解作用，以及对镉超积累番茄植株生长和镉、铅吸收的促进作用。在重金属污染的接种土壤中，与未接种对照相比，氯化钙可提取的镉和铅分别增加了58 - 104%和67 - 93%。这些细菌产生吲哚乙酸、铁载体和1-氨基环丙烷-1-羧酸脱氨酶。在无菌条件下对番茄进行的根伸长试验表明，与对照植株相比，接种的番茄幼苗根伸长增加。与未接种对照相比，在重金属污染土壤中生长的接种植株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，这些细菌可用于增强镉和铅污染土壤的植物提取。
