Table 3.

Mean ± s.e. and ANOVA P-values for the effects of [CO₂] treatment {elevated (e[CO₂]) and actual (a[CO₂]) air CO₂ concentration} and axis position over the vertical profile (L1 = 0–50 cm; L2 = 50–100 cm; L3 > 100 cm) on the number of apexes, living metamers, dead meristems per living meristems and branches of the second- to fifth-order axes of coffee plants

Axis order/layers		Treatments		ANOVA effects (P-value)			Treatments		ANOVA effects (P-value)
		e[CO2]	a[CO2]				e[CO2]	a[CO2]
		Mean ± s.e.		[CO2]	Layer	[CO2] × layer	Mean ± s.e.		[CO2]	Layer	[CO2] × layer
		Living apexes					Living metamers
Second	1	5.0 ± 0.8	4.8 ± 1.2	0.6743	<0.0001	0.6844	368.6 ± 35.0	337.4 ± 51.2	0.6794	0.0946	0.6547
	2	24.6 ± 1.7	24.6 ± 2.4				843.9 ± 90.2	918.1 ± 60.0
	3	37.8 ± 3.5	35.6 ± 3.4				493.6 ± 74.0	551.5 ± 78.5
Third	1	64.8 ± 7.4	68.3 ± 8.9	0.4767	0.0147	0.9332	620.9 ± 65.9	567.8 ± 89.2	0.5334	0.0002	0.8203
	2	117.4 ± 7.4	140.0 ± 20.6				972.8 ± 115.9	840.0 ± 89.7
	3	15.8 ± 3.5	22.4 ± 4.1				102.6 ± 16.9	104.3 ± 22.9
Fourth	1	24.1 ± 3.9	29.6 ± 5.5	0.6757	0.2850	0.1544	159.3 ± 27.3	220.4 ± 35.2	0.9812	0.0646	0.0283
	2	26.8 ± 4.5	18.6 ± 5.1				169.9 ± 33.9	107.5 ± 28.8
Fifth	1	4.0 ± 0.7	6.8 ± 2.0	0.2359	0.0008	0.1233	24.1 ± 3.9	47.1 ± 13.9	0.2149	0.0007	0.0521
	2	1.5 ± 0.8	1.4 ± 0.7				10.9 ± 6.1	5.5 ± 2.4
		Ratio of dead:living apexes					Branching number per axis
Second	1	5.2 ± 1.3	4.6 ± 0.9	0.7579	<0.0001	0.6461	2.9 ± 0.3	3.2 ± 0.3	0.2173	<0.0001	0.8491
	2	0.8 ± 0.1	0.8 ± 0.2				2.9 ± 0.3	3.4 ± 0.5
	3	0.04 ± 0.01	0.06 ± 0.03				0.39 ± 0.07	0.57 ± 0.09
Third	1	0.1 ± 0.0	0.2 ± 0.0	0.3478	<0.0001	0.2477	0.4 ± 0.1	0.4 ± 0.1	0.5052	<0.0001	0.5860
	2	0.04 ± 0.01	0.04 ± 0.03				0.23 ± 0.03	0.13 ± 0.03
Fourth	1	0.1 ± 0.1	0.4 ± 0.4	0.2881	0.1686	0.4241	0.2 ± 0.0	0.2 ± 0.1	0.3339	0.0010	0.7612
	2	0.02 ± 0.02	0.07 ± 0.04				0.05 ± 0.02	0.07 ± 0.03

P-values <0.10 were considered significant and are highlighted in bold.