title: A new chlorophycean nickel hyperaccumulator.
abstract: Bioremediation of nickel by chlorophycean bioremediator, Chlorococcum hemicolum was investigated. The growth rates at various concentrations of Ni2+ were assessed in terms of protein level and 12 mg L(-1) of the Ni2+ is the tolerance limit (46.76% level of growth kinetics). Absorption/adsorption kinetics was estimated after 240 h of Ni2+ treatments. Absorptions were higher than adsorption with maximum accumulation factor (AF) of 1.37. Ni2+ concentration and absorption were linearly related (r=0.98; p>0.01). Other biochemical parameters like total sugar, chlorophyll and carotenoids were also quantified to correlate the state of metabolism and these exhibited reduction due to heavy metal stress.
authors.affiliation: Department of Botany, JNV University, Jodhpur 342 001, India.
authors.lastname: Harish
authors.forename: S
authors.initials: S
authors.lastname: Sundaramoorthy
authors.forename: Devendra
authors.initials: D
authors.lastname: Kumar
authors.forename: S G
authors.initials: SG
authors.lastname: Vaijapurkar
mesh_terms: D000042:Absorption / Q000187:drug effects; D000327:Adsorption / Q000187:drug effects; D020418:Algal Proteins / Q000378:metabolism; D001673:Biodegradation, Environmental / Q000187:drug effects; D002241:Carbohydrates / Q000032:analysis; D056890:Eukaryota / Q000187:drug effects / Q000254:growth & development / Q000378:metabolism*; D007700:Kinetics; D009532:Nickel / Q000378:metabolism* / Q000494:pharmacology; D010860:Pigments, Biological / Q000032:analysis