IJBST 2016 Volume 9 Issue 12
International Journal of BioSciences and Technology (IJBST) ISSN: 0974-3987
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Effect of plant growth promoting rhizobacteria on early growth of Rice plant (Oryza sativa L.) under Cadmium (Cd) and Lead (Pb) stress condition. Amit Kumar Pal and Chandan Sengupta. IJBST (2016), 9(12):74-81
Effect of plant growth promoting rhizobacteria on early growth of Rice plant (Oryza sativa L.) under Cadmium (Cd) and Lead (Pb) stress condition.
Authors & Affiliation:
Amit Kumar Pal and Chandan Sengupta
Microbiology Research Laboratory, Department of Botany, University of Kalyani, Kalyani – 741 235, West Bengal, India.
Microbes assisted phyto-remediation technique are widely applied for reducing the risk of heavy metals contamination in the soil. The present study was designed to observe the effect of rhizobacteria on plant growth enhancement under heavy metal stress condition. We examined the growth of rice plant with two isolated PGPR strains under different test concentration (ppm) of Cd and/or Pb (i.e. 20,40and 60ppm). In all studied cases, we observed that different growth parameters in the un inoculated heavy metal treated rice plants (i.e-without PGPR) were reduced as compared with control plants. Cd and Pb toxicity were assessed by observing different growth parameters like stunted growth and poor rooting and low chlorophyll content. Inoculation of PGPR in rice plant reduced the deleterious effects of heavy metals to some extent and enhanced the different growth parameters as compared with un inoculated heavy metal treated plants. Our present study conducted with 2out of 20 different bacterial isolates but observed results indicated that KUBM 20 strain of enhanced more in the growth of rice plant under heavy metal stress condition than KUBM 1.
Key words: Cadmium stress, Lead stress, PGPR, Oryza sativa L. Early vegetative growth, sustainable agriculture.