Carbonic Anhydrase and Its Influence on Carbon Isotope Discrimination during C4 Photosynthesis. Insights from Antisense RNA in Flaveria bidentis
In C4 plants, carbonic anhydrase (CA) facilitates both the chemical and isotopic equilibration of atmospheric CO2 and bicarbonate (HCO3-) in the mesophyll cytoplasm. The CA-catalyzed reaction is essential for C4 photosynthesis, and the model of carbon isotope discrimination (Δ13C) in C4 plants predicts that changes in CA activity will influence Δ 13C. However, experimentally, the influence of CA on Δ13C has not been demonstrated in C4 plants. Here, we compared measurements of Δ13C during C4...[Show more]
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