Table 1.

ANCOVA results (F‐statistic and P‐value) with leaf form as categorical variable and mean temperature of the warmest quarter (meanTWQ) as the covariate using the values of the control treatments only, transformed when necessary.

Control conditions	Total obs.	Leaf form df = 1		meanTWQ df = 1
Variable		F	P	F	P
V cmax25	69	4.32	0.042	8.63	0.0046
J max25	68	9.66	0.0028	26.09	< 0.0001
J : V 25	53	8.69	0.005	19.95	< 0.0001
A net25	106	0.74	0.39	7.08	0.0091
T optA	56	0.019	0.89	20.17	< 0.0001
A growth	54	8.48	0.0056	0.48	0.49
R growth	126	0.068	0.79	0.84	0.36
R d25	129	0.001	0.97	9.52	0.0026
Na	109	0.99	0.32	19.10	< 0.0001

Sources of the model are the columns and variables form the rows, df is the degree of freedom for each source and the sample size for each variable is found in the second column (Total obs.). P‐values are indicated in bold when significant < 0.05.

Variables are: the maximum carboxylation rate (V _cmax25); the maximum electron transport rate (J _max25); the ratio of J _max25 over V _cmax25 (J : V ₂₅); and net photosynthesis (A _net25). All parameters were measured at a common temperature of 25°C, the temperature optimum of photosynthesis (T _optA); photosynthesis and respiration were measured at their growth temperatures (A _growth and R _growth respectively); mitochondrial dark respiration was measured at 25°C (R _d25); and area‐based leaf nitrogen content (N_a).