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. 2001 Feb 27;98(5):2473–2478. doi: 10.1073/pnas.041620898

Table 1.

Chloroplast fine structure of plants grown in elevated and ambient atmospheric CO2 partial pressures

Species Stroma/Grana thylakoids
Stroma thylakoids/Total area
Grana thylakoids/Total area
Elevated CO2 Ambient CO2 Elevated CO2 Ambient CO2 Elevated CO2 Ambient CO2
A. rubrum 0.87  ± 0.09 0.49  ± 0.05 0.31  ± 0.02 0.19  ± 0.01 0.37  ± 0.02 0.39  ± 0.02
(1.8, t = 3.8, P < 0.01) (1.6, t = 5.1, P < 0.01) (0.9, t = −0.5, ns)
C. canadensis 0.82  ± 0.04 0.52  ± 0.02 0.30  ± 0.02 0.20  ± 0.01 0.37  ± 0.02 0.38  ± 0.02
(1.6, t = 6.6, P < 0.01) (1.6, t = 5.0, P < 0.01) (0.9, t = −0.2, ns)
L. styraciflua 1.30  ± 0.18 0.43  ± 0.04 0.30  ± 0.03 0.20  ± 0.02 0.25  ± 0.02 0.48  ± 0.03
(3.0, t = 4.7, P < 0.01) (1.6, t = 3.5, P < 0.01) (0.5, t = −5.9, P < 0.01)
P. auritum 1.19  ± 0.13 0.67  ± 0.06 0.31  ± 0.03 0.17  ± 0.02 0.27  ± 0.04 0.26  ± 0.02
(1.8, t = 3.6, P < 0.01) (1.8, t = 3.5, P < 0.01) (1.0, t = 0.3, ns)
E. pinnatum 0.89  ± 0.09 0.71  ± 0.03 0.29  ± 0.02 0.32  ± 0.01 0.34  ± 0.02 0.45  ± 0.01
(1.3, t = 1.7, P < 0.05) (0.9, t = −1.1, ns) (0.8, t = −4.3, P < 0.01)

Results are means ± 1 SEM ratios of proportions (column headings). Entries in parentheses are elevated to ambient CO2 ratios and statistical significance level.