Table 1.

Comparison of extracted variables from C balance curves from desiccation‐acclimated (n = 5) and hydration‐acclimated (n = 5) populations of Syntrichia caninervis. Total C balance and areas of phases A, B, and C were calculated on an area basis using integrals between places where the curve crossed zero.^a

Variable	Unit	Hydration‐acclimated phenotype	Desiccation‐acclimated phenotype	t value	P valueb
Total C balance	μmol·m−2	13.94 ± 3.43	−2.45 ± 1.02	−4.32	0.012*
CCP1	minutes	13.40 ± 2.502	192.2 ± 12.77	16.07	<0.0001***
CCP2	minutes	409.0 ± 16.55	330.2 ± 52.43	−1.153	0.313
A phase area	μmol·m−2	−0.07 ± 0.03	−2.93 ± 0.68	−4.129	0.015*
Total dry time	minutes	516.8 ± 61.96	426.2 ± 61.43	−0.829	0.454
R max (A)	μmol·m−2·s−1	−0.977 ± 0.458	−3.469 ± 1.019	−2.118	0.102
Time to R max (A)	minutes	3.400 ± 0.872	36.40 ± 11.31	2.851	0.046*
A max	μmol·m−2·s−1	6.423 ± 1.383	1.114 ± 0.111	−3.886	0.018*
B phase area	μmol·m−2	14.35 ± 3.670	0.88 ± 0.38	−3.596	0.022*
Time to A max	minutes	129.16 ± 33.85	286.8 ± 45.43	2.858	0.046*
R max (C)	μmol·m−2·s−1	−0.220 ± 0.129	−0.556 ± 0.200	−1.737	0.157
Time to R max (C)	minutes	465.0 ± 47.24	361.8 ± 53.30	−1.111	0.329
C phase area	μmol·m−2	−0.35 ± 0.26	−0.40 ± 0.18	−0.152	0.887
Slope 1	μmol·m−2·s−2	−0.453 ± 0.243	−0.190 ± 0.097	0.896	0.421
Slope 2a	μmol·m−2·s−2	0.096 ± 0.047	0.023 ± 0.007	−1.671	0.17
Slope 2b	μmol·m−2·s−2	0.044 ± 0.008	0.017 ± 0.003	−2.982	0.041*
Slope 2	μmol·m−2·s−2	0.047 ± 0.009	0.021 ± 0.006	−2.423	0.073
Slope 3	μmol·m−2·s−2	−0.012 ± 0.009	−0.023 ± 0.003	−0.136	0.245
Slope 4	μmol·m−2·s−2	0.004 ± 0.001	0.009 ± 0.004	1.55	0.196

Note: CCP = CO₂ compensation point; R _max = maximum rate of net negative CO₂ exchange during respiratory phases A and C; A _max = maximum light‐saturated net positive CO₂ exchange during photosynthetic phase B.

^a See Figure 1 for curve locations of extracted variables including slopes 1–4 (S1–S4).

^b *P < 0.05, ***P < 0.0001.