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Inter-strain variability in the photosynthetic use of inorganic carbon, exemplified by the pH compensation point, in the cyanobacterium Microcystis aeruginosa
Bañares-España, E.; López-Rodas, V.; Salgado, C.; Costas, E.; Flores-Moya, A. (2006). Inter-strain variability in the photosynthetic use of inorganic carbon, exemplified by the pH compensation point, in the cyanobacterium Microcystis aeruginosa. Aquat. Bot. 85(2): 159-162
In: Aquatic Botany. Elsevier Science: Tokyo; Oxford; New York; London; Amsterdam. ISSN 0304-3770, more
Peer reviewed article  

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Keywords
    Carbonic anhydrase; Evolution; Microcystis aeruginosa (Kützing) Kützing, 1846 [WoRMS]; Marine

Authors  Top 
  • Bañares-España, E.
  • López-Rodas, V.
  • Salgado, C.
  • Costas, E.
  • Flores-Moya, A.

Abstract
    Inter-strain variability in pH compensation point (pHc) in the cyanobacterium Microcystis aeruginosa has been investigated. The pHc allows one to discriminate whether the organism is able to take up HCO3 as inorganic carbon (Ci) source in photosynthesis. Eight subgroups were found according to the pHc value, ranging from 10.44 ± 0.22 to 11.67 ± 0.05. The high variability in pHc (and consequently, in the capacity to use HCO3 as Ci source) suggested that different HCO3 use mechanisms could occur in M. aeruginosa and, from an evolutionary point of view, this trait is not under high natural selective pressure.

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