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Table 2.

Effect of forskolin (FSK), SQ22,536 and MDL-12,330A on the kinetic parameters (LT and TL_max) of KCl-induced luminescence on O. californica and O. aranea dissociated photocytes

	LT (s)	TL_max (s)
O. californica (N=10)
50 mmol l⁻¹ KCl (control for FSK)	8.30±3.43	11.15±3.43
10⁻⁴ mol 1⁻¹ FSK	0.01^*	1.25±0.33^*
200 mmol l⁻¹ KCl (control for SQ)	0.01	0.55±0.15
10⁻⁵ mol 1⁻¹ SQ22,536	0.01	3.20±0.86^*
200 mmol l⁻¹ KCl (control for MDL)	0.01	0.50±0.16
10⁻⁵ mol 1⁻¹ MDL-12,330A	0.01	3.72±0.73^*
O. aranea (N=10)
200 mmol l⁻¹ KCl (control for MDL)	0.28±0.22	0.61±0.11
10⁻⁵ mol 1⁻¹ MDL-12,330A	0.20±0.08	2.00±0.37^*
200 mmol l⁻¹ KCl (control for SQ)	0.01	0.10±0.06
10⁻⁵ mol 1⁻¹ SQ22,536	0.05±0.04	2.60±0.71^*

	LT (s)	TL_max (s)
O. californica (N=10)
50 mmol l⁻¹ KCl (control for FSK)	8.30±3.43	11.15±3.43
10⁻⁴ mol 1⁻¹ FSK	0.01^*	1.25±0.33^*
200 mmol l⁻¹ KCl (control for SQ)	0.01	0.55±0.15
10⁻⁵ mol 1⁻¹ SQ22,536	0.01	3.20±0.86^*
200 mmol l⁻¹ KCl (control for MDL)	0.01	0.50±0.16
10⁻⁵ mol 1⁻¹ MDL-12,330A	0.01	3.72±0.73^*
O. aranea (N=10)
200 mmol l⁻¹ KCl (control for MDL)	0.28±0.22	0.61±0.11
10⁻⁵ mol 1⁻¹ MDL-12,330A	0.20±0.08	2.00±0.37^*
200 mmol l⁻¹ KCl (control for SQ)	0.01	0.10±0.06
10⁻⁵ mol 1⁻¹ SQ22,536	0.05±0.04	2.60±0.71^*

The results for A. filiformis are not shown since no significant effect of any of the drugs was observed on the kinetic parameters of light emission in this species. Means ± s.e.m. are expressed in seconds; values without s.e.m. are due to the fact that the same LT was observed for all repetitions. ^*P<0.01; N, number of stimulated aliquot parts.

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