Table 1. Extracellular superoxide production rates by Stylophora pistillata.

	Symbiont Stylophora					Aposymbiont (bleached) Stylophora
Sample	I	II	III	IV	Average	I	II	III	IV	Average
Dark O2 − production rate* (nmol min−1 mg−1 protein)	0.95	0.27	0.19	0.41	0.46 (0.34)	0.34	0.20	0.74	1.41	0.67 (0.54)
Light O2 − production rate* (nmol min−1 mg−1 protein)	1.34	0.44	0.41	0.56	0.69 (0.44)	0.35	0.27	0.70	1.26	0.64 (0.45)
Light enhancement (%)**	41	63	115	35	64A (37)	3	31	−5	−11	5B (19)
DPI inhibition (%)***					61 ; 76					76 ; 68

*Superoxide production rates were calculated according to Equation 1 and normalized to protein.

**Calculated relative to the dark production rate ( = 100*(Light-Dark)/Dark).

***Calculated relative to the sample without DPI ( = 100*(with DPI- without DPI)/without DPI). Conducted in the light (right-hand side) and in the dark (left-hand side).

Superoxide production rates of symbiont (non-bleached) and aposymbiont (bleached) corals in the dark and in the light and with the NADPH Oxidase inhibitor DPI. Rates are presented for individual nubbins (samples I–IV) and as averages (1 SD in parentheses). An analysis of variance (ANOVA) between the symbiont and aposymbiont corals was performed for the dark and light treatments and for the light enhancement. Superscript letters indicate significantly different groupings; no letters indicate that the ANOVA test was not significant.