Table 3.

Effect of different concentrations of Zn²⁺ (5, 15, 25 mg/L) on the content of fatty acid fractions (µg mL⁻¹) of Dunaliella tertiolecta cultured on MH basal medium for 14 days

Fatty acids		Control	Different concentrations of Zn2+
			5 mg/L	15 mg/L	25 mg/L
Saturated fatty acids	C12:0	0.545	0.537	0.065	0.032
	C13:0	0.202	0.134	0.100	_
	C14:0	1.021	0.708	0.451	0.381
	C16:0	2.724	2.138	2.019	1.429
	C18:0	0.016	_	_	_
	C20:0	0.193	0.172	0.165	0.137
Total		4.701	3.689	2.800	1.979
% of decrease		_	21.53	40.44	57.90
Mono unsaturated fatty acids	C16:1 (n-7)	2.702	2.722	1.011	0.113
	C18:1 (n-9)	0.476	0.365	0.300	0.040
	C22:1 (n-9)	0.158	0.132	0.102	_
Total		3.336	3.219	1.413	0.153
% of decrease		_	3.51	57.64	95.41
Poly unsaturated fatty acids	C18:2 (n-6)	0.221	0.055	0.041	0.025
	C18:4 (n-3)	0.532	0.423	0.351	_
	C20:5 (n-3)	1.325	0.630	0.243	_
	C22:6 (n-3)	2.469	2.250	1.049	0.419
Total		4.547	3.358	1.684	0.444
% of decrease		_	26.15	62.96	90.24
Total content		12.584	10.266	5.897	2.576
% of total content		_	18.42	53.14	79.53