Table 1.

An estimation of the fraction of absorbed light partitioned to PSI (f_I) obtained by Chl fluorescence method measured under low irradiances, high pCO₂ conditions (4%) and temperature of 28 °C in leaf of control and shade-grown C₃, C₄, gymnosperm, fern and liverwort species

Irradiance (µmol photons m−2 s−1)	fI control	fI shade
Panicum bisulcatum (n = 4) (C3)
50	0.40 ± 0.02	0.51 ± 0.01
100	0.40 ± 0.01	0.47 ± 0.02
200	0.43 ± 0.01	0.59 ± 0.02
300	0.45 ± 0.02	0.61 ± 0.03
Panicum miliaceum (n = 4) (NAD-ME)
50	0.60 ± 0.01	0.58 ± 0.02
100	0.58 ± 0.01	0.59 ± 0.01
200	0.62 ± 0.02	0.64 ± 0.02
300	0.67 ± 0.03	0.69 ± 0.02
Megathyrsus maximus (n = 4) (PCK)
50	0.43 ± 0.01	0.54 ± 0.03
100	0.42 ± 0.00	0.56 ± 0.02
200	0.47 ± 0.01	0.63 ± 0.03
300	0.50 ± 0.01	0.68 ± 0.03
Panicum antidotale (n = 4) (NADP-ME)
50	0.60 ± 0.02	0.62 ± 0.02
100	0.57 ± 0.02	0.65 ± 0.01
200	0.57 ± 0.02	0.68 ± 0.02
300	0.62 ± 0.01	0.73 ± 0.02
Zea mays (n = 8) (NADP-ME)
50	0.58 ± 0.02	0.60 ± 0.01
100	0.57 ± 0.02	0.59 ± 0.02
200	0.58 ± 0.02	0.61 ± 0.03
300	0.60 ± 0.02	0.65 ± 0.03
Spinach (n = 5) (C3)
50	0.49 ± 0.01
100	0.51 ± 0.00
200	0.50 ± 0.00
300	0.50 ± 0.00
Ginkgo biloba (n = 4) (gymnosperm)
50	0.37 ± 0.01
100	0.38 ± 0.01
200	0.43 ± 0.00
300	0.46 ± 0.01
Wollemi nobilis (n = 4) (gymnosperm)
50	0.22 ± 0.03
100	0.31 ± 0.04
200	0.49 ± 0.07
300	0.49 ± 0.08
Polypodium sp. (n = 4) (fern)
50	0.48 ± 0.01
100	0.54 ± 0.01
200	0.61 ± 0.02
300	0.59 ± 0.01
Marchantia polymorpha (n = 4) (liverwort)
50	0.44 ± 0.01
100	0.49 ± 0.02
200	0.57 ± 0.03
300	0.61 ± 0.04

Values are mean ± S.E.