Table 5. CO₂ concentration at three different levels of light intensity for 90 minutes

Time (Min.)	Dieffenbachia amoena			Spathiphyllum spp.			Significance
	Light intensity (µmol․m⁻²․s⁻¹)			Light intensity (µmol․m⁻²․s⁻¹)
	0	30	60	0	30	60
0	100.0^z	100.0a	100.0a	100.0a	100.0a	100.0a	ns
10	100.8a	100.0ab	100.5a	100.9a	99.9ab	99.1b	ns
20	101.3a	100.0ab	100.6a	101.6a	99.6ab	98.0b	*
30	101.7a	100.0a	100.0a	102.1a	99.3ab	97.0b	*
40	l02.0ab	100.1ab	99.8ab	102.6a	98.8bc	96.1c	*
50	102.3ab	100.1ab	99.5ab	103.0a	98.7b	948c	**
60	102.6ab	100.2ab	99.1ab	103.5a	98.3b	93.6c	**
70	102.8ab	100.2ab	98.8b	104.0a	98.1b	92.6c	**
80	103.0ab	100.3ab	98.5b	104.5a	97.7b	91.6c	**
90	103.2ab	100.3abc	98.0bc	104.9a	97.3c	90.5d	**

Means separation within rows by Duncan's multiple range test, p<0.05.
Nonsignificant or significant at p=0.05, 0.01, or 0.001, respectively.