Table IV.

In vivo (assimilation rate [30°C] per Rubisco sites) and in vitro (25°C) kcat (mol CO2 [mol sites]−1 s−1) of 7 NAD-ME and 7 NADP-ME grasses grown under high (HN) and low (LN) soil N supply (experiment 3; Table I)

Other details are as described for Table III.

SpeciesA/Rubisco (30°C)In Vitro kcat (25°C)
HNLNHN
NAD-ME
    Astrebla lappacea3.7 ± 0.34.2 ± 0.13.9 ± 0.1
    Astrebla pectinata5.1 ± 0.54.7 ± 0.25.3 ± 0.3
    Eragrostis superba4.0 ± 0.34.5 ± 0.24.9 ± 0.3
    Panicum coloratum2.8 ± 0.24.9 ± 0.32.8 ± 0.2
    Panicum decompositum3.5 ± 0.34.6 ± 0.73.4 ± 0.0
    Panicum miliaceum4.0 ± 0.95.9 ± 0.11.9 ± 0.0
    Panicum virgatum4.3 ± 0.25.5 ± 0.14.7 ± 0.6
NADP-ME
    Bothriochloa biloba7.1 ± 0.511.5 ± 1.66.0 ± 0.3
    Bothriochloa bladhi6.8 ± 0.55.4 ± 0.16.2 ± 0.3
    Cenchrus ciliaris6.5 ± 0.411.4 ± 1.16.1 ± 0.3
    Dichanthium sericeum4.4 ± 0.09.6 ± 0.36.1 ± 0.1
    Paspalum dilatatum4.5 ± 0.95.6 ± 0.54.6 ± 0.1
    Paspalum notatum5.6 ± 0.05.8 ± 0.04.9 ± 0.1
    Pennisetum clandestinum6.7 ± 0.77.8 ± 0.16.4 ± 0.2
Average (NAD-ME)3.9 ± 0.34.9 ± 0.23.8 ± 0.5
Average (NADP-ME)5.9 ± 0.48.2 ± 1.05.7 ± 0.3
P (subtype)*********
P (N)**
P (N × subtype)nsns