Responses of cyanobacterium Anabaena doliolum during nickel stress.
Growth and biochemical responses of heterocystous nitrogen fixing cyanobacteria Anabaena doliolum were studied upon exposure to various concentrations of nickel (0.1 to 100 microM) for duration of up to 4 days, in view of its tolerance. The growth of the cyanobacterium was increased in terms of cell density (O.D), heterocyst frequency chlorophyll-a, carotenoid and c-phycocynin up to moderate exposure (10 microM for 96 hr of Ni treatment). Protein and total non protein thiol were measured as stress responsive metabolites and frequency of heterocyst and spores were observed in responses to Ni. The present study demonstrated that the tested cyanobacterium exhibited dose specific responses of metal towards studied different morphological, physiological and biochemical parameters.
Ecotoxicology and Bioremediation Group, National Botanical Research Institute, Rana Pratap Marg, Lucknow 226 001, India.
M K
MK
Shukla
R D
RD
Tripathi
N
N
Sharma
S
S
Dwivedi
S
S
Mishra
R
R
Singh
O P
OP
Shukla
U N
UN
Rai
D017033:Anabaena / Q000187:drug effects* / Q000254:growth & development / Q000502:physiology; D001673:Biodegradation, Environmental; D018533:Biomass; D002734:Chlorophyll / Q000378:metabolism; D000077194:Chlorophyll A; D009532:Nickel / Q000633:toxicity*; D013312:Stress, Physiological
D002734:Chlorophyll; D009532:Nickel; D000077194:Chlorophyll A