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. 2006 Oct;142(2):673–684. doi: 10.1104/pp.106.085829

Table II.

Inhibition of PEPC by malate [I50 (malate)] in soluble protein extracts from leaves of the single-cell functioning C4 species B. sinuspersici and S. aralocaspica and related chenopod species

Samples were taken after 5 h into the light and dark periods. PEPC from crude extracts was assayed at pH 7.2, 0.1 mm PEP. Values represent the mean of at least three independent determinations (ses are shown).

Species Photosynthetic Type I50 (malate)
I50 (malate)Light/Dark
Light Dark
mm
B. sinuspersici Single-cell C4 2.22 ± 0.03 2.00 ± 0.25 1.11
0.60 ± 0.02a 0.23 ± 0.02a 2.61a
S. aralocaspica Single-cell C4 0.69 ± 0.07 0.33 ± 0.06 2.09
H. persicum Kranz C4 1.91 ± 0.04 0.47 ± 0.05 4.06
S. eltonica Kranz C4 0.89 ± 0.05 0.26 ± 0.01 3.42
S. richteri Kranz C4 2.17 ± 0.11 1.25 ± 0.14 1.74
S. linifolia C3 3.93 ± 0.06 3.90 ± 0.11 1.01
a

With B. sinuspersici, PEPC was also assayed at pH 7.2 with 0.055 mm PEP.