- Previous Article
- Next Article
- Table of Contents
Current Microbiology, Vol.50, No.5, 233-237, 2005
Isolation and functional characterization of Siderophore-producing lead- and cadmium-resistant Pseudomonas putida KNP9
Heavy metals, being phytotoxic, cause growth inhibition and even plant death. Siderophore-producing bacterial strain KNP9 is growth promoting and has been isolated from Panki Power Plant, Kanpur, India. It simulated significant (p > 5%) root and shoot growth of mung bean to the extent of 16.48% and 28.80%, respectively in the presence of CdCl2 (110 mu m). However, the increase in root and shoot growth was 20% and 19.5%, respectively, in the presence of (CH3COO)(2)Pb (660 mu m). Moreover, concentration of accumulated lead and cadmium in root and shoot was also reduced in the presence of this isolate ranging from 37.5 to 93.19%. A moderate reduction in chlorophyll content (39.14%) in the presence of 110 mu m CdCl2 was rescued by bioinoculant KNP9. However, the 19.58% decrease in chlorophyll content in the case of lead acetate remained unchanged even in the presence of KNP9. Nevertheless, 16S ribosomal DNA (rDNA) sequencing identified KNP9 as a strain of Pseudoinonas putida.