Distinction between HCO 3−- and CO 2-dependent photosynthesis in the cyanobacterium Synechococcus leopoliensis based on the selective response of HCO 3− transport to Na +

A.G Miller,D.T Canvin

doi:10.1016/0014-5793(85)81207-2

Distinction between HCO 3−- and CO 2-dependent photosynthesis in the cyanobacterium Synechococcus leopoliensis based on the selective response of HCO 3− transport to Na +

A.G Miller, D.T Canvin

https://doi.org/10.1016/0014-5793(85)81207-2

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Journal: FEBS Letters	Publication Date: Jul 22, 1985
Citations: 65

Affiliation: Queen's University

#Dissolved Inorganic Carbon #Carbonic Anhydrase + Show 8 more

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Abstract

At low concentrations of dissolved inorganic carbon (DIC) at pH 8.0 the rates of DIC transport and fixation by Synechococcus leopoliensis were markedly stimulated by the addition of Na + Carbonic anhydrase (CA) addition gave similar results. The Na +-stimulated photosynthesis was inhibited by Li + whereas the CA-stimulated photosynthesis was not. The addition of a high DIC concentration (1 mM) overcame the need for either Na + or CA. We suggest that Na + stimulated HCO 3 − transport whereas CA stimulated CO 2 transport (by increasing the supply rate of CO 2 to the cells).

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