Table 2. Photosynthetic rate, stomatal conductance and number of stomata according to light intensity (n=9)

	Light intensity (µmol ․ m −2 ․ s−1)	Dieffenbachia amoena	Spathiphyllum spp.
Photosynthetic rate (µmolCO2 ․ m−2 ․ s−1)	30	1.112bz	3.748b
	60	1.425a	4.404a
	Significance	***	**
Stomatal conductance (µmolH20 ․ m−2 ․ s−1)	30	0.007a	0.036a
	60	0.005a	0.065a
	Significance	ns	ns
	30	29.2 (29.2y+0x)a	40.2 (32.4+7.8)b
Number of stomata	60	19.9 (19.9+0)b	57.8 (48.3+9.5)a
	Significance	**	***

Means separation within columns by Duncan's multiple range test, p<0.05.
Means number of stomata on back of leaf.
Means number of stomata on front of leaf.
Nonsignificant or significant at p=0.05, 0.01, or 0.001, respectively.