Antioxidant Efficiency of Platynereis spp. (Annelida, Nereididae) under Different pH Conditions at a Vent’s System

Table 1

Sampling periods’ variations of biomarkers (mean values ± standard deviations, ) in Platynereis spp. population from Sant’Anna (SA, normal pH conditions) and Castello Aragonese (CA, acidified pH conditions).

		April		October		February		Period x population
		Mean	s.d.	Mean	s.d.	Mean	s.d.
CAT	SA	52.91a	15.88	35.52b	1.85	24.05c	6.91
	CA	48.63	20.33	44.82	1.95	45.66	9.78
GST	SA	58.58a	24.73	29.62b	4.63	30.44b	8.58
	CA	37.75ab	12.10	34.24a	5.05	26.59b	5.62
GR	SA	54.53a	25.45	30.43a	6.94	6.98b	3.47	p < 0.001
	CA	21.68a	2.06	32.11b	5.94	22.67ab	5.15
GPx	SA	13.91	6.20	26.29	13.67	20.32	5.39
	CA	16.3a	3.01	23.29b	4.64	18.05ab	3.97
ROO•	SA	1044.88	359.44	904.99	203.17	774.35	146.88
	CA	918.83	331.44	988.68	312.71	946.79	270.06
HO•	SA	654.36	240.36	581.23	157.36	647.05	180.70
	CA	640.78ab	181.19	748.18a	186.85	446.85b	89.39
HOONO	SA	500.79a	127.41	786.5b	101.88	336.42c	37.99	p < 0.01
	CA	451.32	142.57	522.71	134.84	507.98	139.86

CAT: catalase (μmol/min/mg prt); GST: glutathione S-transferases (nmol/min/mg prt); GR: glutathione reductase (nmol/min/mg prt); GPx: glutathione peroxidases (nmol/min/mg prt); ROO•, HO•, and HOONO: TOSC toward peroxyl, hydroxyl radicals, and peroxynitrite (UTosc/mg prt). The p values are given for the interaction “period x population” when it resulted in statistical significance (PERMANOVA); different letters indicate significant differences among sampling periods (p < 0.05), while asterisks indicate significant differences between Sant’Anna and Castello Aragonese Platynereis spp. populations (p < 0.05) (PERMANOVA pairwise post hoc comparison).