. 2016 Jul 18;23(6):706–712. doi: 10.1016/j.sjbs.2016.06.010

Table 4.

Effect of UV-B and nitrogen starvation on superoxide dismutase, SOD; ascorbate peroxidase, APX and guaiacol peroxidase, GUPX activities Spirulina platensis and Dunaliella salina. Values are means ± SE (n = 5).

Treatment 72 h	SOD (U/mg protein)		APX (U/mg protein)		GUPX (U/mg protein)
Treatment 72 h
Spirulina platensis	Dunaliella salina	Spirulina platensis	Dunaliella salina	Spirulina platensis	Dunaliella salina

Optimum nutrient + zero UV-B	9.10 ± 0.56^a	11.2 ± 0.39^a	2.43 ± 0.57^a	2.89 ± 0.55^a	384 ± 5.77^a	412 ± 5.74^a
Optimum nutrient + UV-B dose (kJ m⁻² d⁻¹)	19.44 ± 0.58^b	24.8 ± 0.49^b	5.76 ± 0.67^b	6.14 ± 0.46^b	523 ± 5.76^b	601 ± 5.73^b
Nitrogen starvation + Zero UV-B	17.54 ± 0.45^c	22.63 ± 0.43^c	4.93 ± 0.45^c	5.22 ± 0.47^b	507 ± 5.74^c	573 ± 5.72^c
Nitrogen starvation + UV-B dose (kJ m⁻² d⁻¹)	13.45 ± 0.48^d	14.25 ± 0.45^d	3.64 ± 0.39^d	4.00 ± 0.32^d	464 ± 5.78^d	511 ± 5.65^d