Response of Anabaena PCC 7120 to Nickel and Cadmium stress

Harish ., S Sundaramoorthy

Abstract


Anabaena PCC 7120 strain is sensitive to Ni2+ and Cd2+ and growth rates at various concentration of these metals were assessed in terms of protein level.  Tolerance limits to Ni2+ and Cd2+ are 1.2 mg/L (39% level in growth kinetics) and 1.2 mg/L (48.99% level in growth kinetics), respectively.Absorption/adsorption kinetics was estimated after 240 hrs of heavy metal treatments. For both the heavy metals, absorptions were higher than adsorption.  Metal concentration and absorption were linearly related (r=0.01). Sugar and pigment exhibited reduction due to heavy metal stress.

Keywords


Absorption, Adsorption, Anabaena, Cadmium, Nikel

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