Biodegradation and Utilization of Organophosphorus Pesticide Malathion by Cyanobacteria

Table 2

Total phosphorus content (mg/g dry weight) of algal biomass under unlimitation and P-limitation condition with the addition of malathion.

Algal strains	A. oryzae	N. muscorum	S. platensis
Unlimitation	10.1±0.1	9.2±0.1	19.8±0.1
P-limitation	2.2±0.1^a	3.6±0.1^a	0.7±0.1^a
P-limitation with different concentrations of malathion (ppm)
0.02	6.9±0.0^b	11.2±0.0	1.0±0.0
0.2	8.8±0.1^b	4.3±0.1^b	0.9±0.1^b
2	11.6±0.1^b	4.7±0.1^b	0.9±0.1^b
20	13.7±0.1^b	5.8±0.1^b	3.8±0.1^b
50	14.0±0.1^b	6.6±0.1^b	4.1±0.1^b
100	15.9±0.1^b	10.4±0.1^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.