Biodegradation and Utilization of Organophosphorus Pesticide Malathion by Cyanobacteria

Table 1

The growth of algal strains, expressed as cell count (number of cells ×10⁶/mL), under unlimitation and P-limitation conditions with the addition of malathion.

Algal strains	A. oryzae	N. muscorum	S. platensis
Unlimitation	24.7±2.9	6.6±0.5	8.8±0.1
P-limitation	1.2±0.3^a	1.4±0.2^a	4.2±0.4^a
P-limitation with different concentrations of malathion (ppm)
0.02	4.4±0.5^b	2.1±0.3^b	6.4±1.1^b
0.2	5.4±1.2^b	4.3±0.3^b	7.0±0.9^b
2	5.6±0.6^b	4.8±0.5^b	7.2±0.9^b
20	13.4±0.6^b	4.9±0.2^b	7.8±0.7^b
50	22.6±0.8^b	7.1±0.1^b	8.2±0.7^b
100	26.1±2.4^b	7.6±0.5^b	0.0±0.0^b

Values are means of three replicates ± standard errors.
^aSignificant decrease compared with unlimitation condition.
^bSignificant increase compared with P-limitation condition.