Distinction between HCO3 −‐ and CO2‐dependent photosynthesis in the cyanobacterium Synechococcus leopoliensis based on the selective response of HCO3 − transport to Na+

FEBS Letters

Canvin, D.T.¹  Miller, A.G.¹ 

[1] Department of Biology, Queen's University, Kingston, Ontario K7L 3N6, Canada

关键词: Synechococcus Inorganic carbon uptake Photosynthesis Na+-dependent HCO3 − transport CO2 transport;   

DOI  :  10.1016/0014-5793(85)81207-2

学科分类：生物化学/生物物理

来源: John Wiley & Sons Ltd.

【 摘 要 】

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 HCO₃ ⁻ transport whereas CA stimulated CO₂ transport (by increasing the supply rate of CO₂ to the cells).

【 授权许可】

Unknown