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Nickel Bioremediation by Different Wetland Macrophytes Root Associated Bacteria

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Title Nickel Bioremediation by Different Wetland Macrophytes Root Associated Bacteria
 
Creator Paritosh Kumar
Ravinder Kaur
Archna Suman
Alpana Singh
Prakash Kumar
 
Subject Constructed wetland
Macrophytes
Plant root associated bacteria
Wastewater
Nickel bioremediation
 
Description A study was conducted at ICAR-Indian Agricultural Research Institute, New
Delhi (India) to enumerate bacterial load associated with five different
macrophytes viz. Typha latifolia, Phragmites karka, Acorus calamus, Arundo
donax and Vetiver zizanioides maintained after monthly applications of metal
solution of 5.0 ppm of nickel. The roots of macrophytes supported bacterial
associations amounting to 2.25×10 7 cfu/g and of them fifty two bacterial
morphotypes were isolated. Mean nickel removal efficiency of the bacterial
isolates was 11.06% after 3 days with maximum of 17.98% by the bacteria
isolated from Phragmites. Most efficient thirteen dominant morphotypes for
Ni-bio-accumulation were identified with 16S rRNA sequencing. Bacillus
were the predominant bacterial genera (53.85%) followed by Pseudomonas
and Microbacter (15.38%) which had shown the nickel removal capacity of
19.78%, 27.66% and 16.90% after 3 days of incubation, respectively.
However, Ni removal by Pseudomonas mendocina isolated from Vacha root
was maximum (34.20%). The overall results showed that macrophytes root
associated bacteria may play an important role in plant assisted Nickel bio-
remediation.
ICAR
 
Date 2022-09-21T09:16:50Z
2022-09-21T09:16:50Z
2017-01-01
 
Type Article
 
Identifier http://krishi.icar.gov.in/jspui/handle/123456789/74415
 
Language English