Table III.

Leaf N, Chl, Rubisco sites, and the fraction of leaf N invested in Rubisco of seven NAD-ME and seven NADP-ME grasses grown under high (HN) and low (LN) soil N supply (experiment 3; Table I)

Values are means ± se. Significance levels are as described in the legend of Figure 1.

SpeciesLeaf NChlRubiscoRubisco N
HNLNHNLNHNLNHNLN
mmol m−2μmol m−2μmol sites m−2% leaf N
NAD-ME
    Astrebla lappacea103 ± 630 ± 1389 ± 27215 ± 011.1 ± 0.64.9 ± 0.38.4 ± 0.012.8 ± 1.4
    Astrebla pectinata126 ± 090 ± 6453 ± 19277 ± 06.8 ± 0.74.6 ± 0.34.2 ± 0.44.0 ± 0.0
    Eragrostis superba118 ± 148 ± 3423 ± 11263 ± 118.5 ± 0.24.7 ± 0.15.6 ± 0.27.7 ± 0.3
    Panicum coloratum119 ± 1653 ± 2473 ± 21296 ± 2711.0 ± 1.14.8 ± 0.37.3 ± 0.27.2 ± 0.3
    Panicum decompositum128 ± 560 ± 10605 ± 60383 ± 4510.4 ± 1.26.9 ± 1.96.4 ± 0.58.8 ± 1.1
    Panicum miliaceum143 ± 747 ± 9452 ± 25224 ± 89.9 ± 1.93.6 ± 0.15.5 ± 1.36.1 ± 1.1
    Panicum virgatum132 ± 673 ± 2646 ± 6402 ± 108.8 ± 0.45.0 ± 0.35.3 ± 0.55.3 ± 0.2
NADP-ME
    Bothriochloa biloba66 ± 444 ± 0503 ± 69326 ± 234.0 ± 0.62.4 ± 0.44.7 ± 0.44.3 ± 0.7
    Bothriochloa bladhi81 ± 360 ± 3488 ± 25512 ± 814.8 ± 0.14.6 ± 0.84.6 ± 0.36.0 ± 0.9
    Cenchrus ciliaris98 ± 1.427 ± 3488 ± 16203 ± 76.4 ± 0.42.0 ± 0.25.1 ± 0.25.7 ± 0.1
    Dichanthium sericeum83 ± 738 ± 1586 ± 80281 ± 97.4 ± 0.32.5 ± 0.27.0 ± 0.45.2 ± 0.5
    Paspalum dilatatum100 ± 1240 ± 3442 ± 71268 ± 227.2 ± 0.64.5 ± 0.35.8 ± 1.28.8 ± 0.1
    Paspalum notatum87 ± 137 ± 1536 ± 62223 ± 108.2 ± 0.13.9 ± 0.47.4 ± 0.28.3 ± 0.5
    Pennisetum clandestinum108 ± 137 ± 1462 ± 10241 ± 146.0 ± 0.82.6 ± 0.04.4 ± 0.55.7 ± 0.1
Average (NAD-ME)124 ± 557 ± 7492 ± 36294 ± 289.5 ± 0.64.9 ± 0.46.1 ± 0.57.4 ± 1.1
Average (NADP-ME)89 ± 541 ± 4501 ± 18293 ± 396.3 ± 0.63.2 ± 0.45.6 ± 0.56.3 ± 0.6
P (subtype)******nsns**********
P (N)**********************
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