Sinha Sangram, Mukherjee Samir Kumar
Department of Microbiology, University of Kalyani, Kalyani 741 235, West Bengal, India.
Curr Microbiol. 2008 Jan;56(1):55-60. doi: 10.1007/s00284-007-9038-z. Epub 2007 Sep 27.
This study focuses on the isolation and characterization of a high cadmium (Cd)-resistant bacterial strain, and possible exploitation of its Cd-accumulation and Cd-induced siderophore production property to improve plant growth in cadmium-contaminated soil through root colonization. The bacterial strain could tolerate up to 8 mM of Cd and could accumulate Cd intracellularly. The strain showed Cd-induced siderophore production maximally at 1.75 mM of Cd concentration under culture condition. It stimulated the growth of mustard and pumpkin plants in Cd-added soil through its establishment in rhizosphere. Through biochemical characterization and 16S rDNA sequence analysis, the strain KUCd1, as the name given to it, was identified as a strain of Pseudomonas aeruginosa.
本研究聚焦于一株高耐镉细菌菌株的分离与特性分析，并探讨利用其镉积累及镉诱导铁载体产生的特性，通过根部定殖来改善镉污染土壤中植物的生长。该细菌菌株能够耐受高达8 mM的镉，并能在细胞内积累镉。在培养条件下，该菌株在镉浓度为1.75 mM时，铁载体产量达到最大值。通过在根际定殖，它促进了添加镉土壤中芥菜和南瓜植株的生长。通过生化特性分析和16S rDNA序列分析，该菌株KUCd1被鉴定为铜绿假单胞菌。
