Table 1.

Biomass and toxin production of C1/C2 at 28 days of A. circinalis under modified condition of Fitzgerald medium.

Entry	Parameters		Biomass	Toxin concentration of C1/C2 (μmol/L)
				Total	Intracellular (%)	Extracellular (%)
	Control		2300	1.39	80	20
1	NaNO3	0 mM	400	0.82	75	25
2		2.9 mM	1200	1.26	86	14
3		11.6 mM	1600	1.03	84	16
4	K2HPO4	0.14 mM	1600	1.43	86	14
5		0.54 mM	2000	1.49	84	16
6	Inoculation	0.5 L	2000	1.36	77	23
7		2 L	2500	1.05	84	16
8	Pyridoxal phosphate	10 μM	2500	1.36	58	42
9	Glycerophosphate Na	10 μM	3100	1.89	55	45
10		100 μM	2300	1.33	59	41
11	Bicine	0.6 mM	2700	1.78	3	97
	Average *			1.35	75	25

^*Average toxin concentration was calculated using the data from entry 1 to 10.