. 2013 Aug 15;8(8):e72145. doi: 10.1371/journal.pone.0072145

Table 3. Estimated values, standard error and p-value of the diurnal and vertical effect on the Fv/Fm parameter in the nonlinear mixed model.

	a		b		c		d
	Value	SE	Value	SE	Value	SE	Value	SE
NN	3.1×10⁻³	0.72×10⁻³	NS	NS	NS	NS	NS	NS
TOD_am	0.184^a	0.00704	665.0^a	71.5	0.598^a	0.006	92.0^a	2.50
TOD_noon	0.182^a	0.00712	955.0^b	116.0	0.598^a	0.006	101.8^b	2.94
TOD_pm	0.188^b	0.0071	1184.8^b	119.9	0.598^a	0.006	100.6^b	2.70

a = amplitude of the Fv/Fm values; b = indicator of the width of the seasonal dip (expressed in DOY²); c = minimum Fv/Fm value; d = day of the year where the minimum Fv/Fm value was reached. NN = node number and TOD = time of the day, with TOD_am = morning, TOD_noon = midday and TOD_pm = afternoon, SE = Standard error.

Values followed by the same letter within a column are not significantly different from each other at p<0.05. NS = not significant.