Cadmium-induced siderophore production by a high Cd-resistant bacterial strain relieved Cd toxicity in plants through root colonization.
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.
Sinha
Sangram
S
Department of Microbiology, University of Kalyani, Kalyani 741 235, West Bengal, India.
Mukherjee
Samir Kumar
SK
D000900:Anti-Bacterial Agents / Q000494:pharmacology*; D002104:Cadmium / Q000378:metabolism / Q000494:pharmacology*; D028464:Cucurbita / Q000254:growth & development / Q000382:microbiology; D004275:DNA, Ribosomal / Q000235:genetics; D024881:Drug Resistance, Bacterial; D009149:Mustard Plant / Q000254:growth & development / Q000382:microbiology; D018517:Plant Roots / Q000382:microbiology; D011550:Pseudomonas aeruginosa / Q000145:classification / Q000187:drug effects* / Q000235:genetics / Q000302:isolation & purification; D012329:RNA, Bacterial / Q000235:genetics; D012336:RNA, Ribosomal, 16S / Q000235:genetics; D017262:Siderophores / Q000096:biosynthesis*; D015854:Up-Regulation
D000900:Anti-Bacterial Agents; D004275:DNA, Ribosomal; D012329:RNA, Bacterial; D012336:RNA, Ribosomal, 16S; D017262:Siderophores; D002104:Cadmium