Assessment of the effect of the toxicity of a textile dye on Nostoc muscorum ISU, a diazotrophic cyanobacterium.
The impact of graded concentrations (5, 10, 15 and 20 mg dm(-3) of acid mordant Metomega Chrome Orange GL, a common dye used in woollen, carpet and textile industries, was studied on protein and pigment content and photosynthetic oxygen evolution in a diazotrophic cyanobacterium Nostoc muscorum. The lower concentration of 5 mg dm(-3) showed a negligible effect on protein and pigment content and photosynthetic oxygen evolution, whereas at higher concentrations a drastic decrease in the above parameters was observed. The highest concentration of 20 mg dm(-3) resulted in a decrease of protein, chlorophyll a, phycocyanin and carotenoid content by 72, 76, 54 and 17% of the control, respectively. Photosynthetic oxygen evolution also decreased by 92% of the control at this concentration of the dye.
Shukla
S P
SP
Centre of Advanced Study in Botany, Faculty of Science, Banaras Hindu University, Varanasi-221 005, India.
Kumar
A
A
Tiwari
D N
DN
Mishra
B P
BP
Gupta
G S
GS