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 ± 0.1a	3.6 ± 0.1a	0.7 ± 0.1a
P-limitation with different concentrations of malathion (ppm)
0.02	6.9 ± 0.0b	11.2 ± 0.0	1.0 ± 0.0
0.2	8.8 ± 0.1b	4.3 ± 0.1b	0.9 ± 0.1b
2	11.6 ± 0.1b	4.7 ± 0.1b	0.9 ± 0.1b
20	13.7 ± 0.1b	5.8 ± 0.1b	3.8 ± 0.1b
50	14.0 ± 0.1b	6.6 ± 0.1b	4.1 ± 0.1b
100	15.9 ± 0.1b	10.4 ± 0.1b	0.0 ± 0.0b

Values are means of three replicates ± standard errors.

^aSignificant decrease compared with unlimitation condition.

^bSignificant increase compared with P-limitation condition.