Table I.

Characteristics of three Senecio species measured at different pO2 levels

SpeciesSpecific Leaf MassPEPc ActivitypO2Γ*AmaxgsgiRd
g m−2μmol NADH mg−1 protein s−1mbarμbarμmol m−2 s−1mol m−2 s−1μmol m−2 s−1
S. squalidus37.80.30 ± 0.05202.720.60.570.270.12
2103814.80.440.14
300609.90.400.15
S. cineraria58.70.16 ± 0.05204.016.80.460.250.20
2104112.40.380.20
300706.70.310.22
S. greyii74.00.60 ± 0.20204.111.00.190.220.41
210458.40.170.38
300775.10.100.39