Is HCO3 transport in anabaena a Na+ symport?

Lenora Reinhold, Micha Volokita, Drora Zenvirth, Aaron Kaplan

Research output: Contribution to journalArticlepeer-review

32 Scopus citations


Na+ strongly promoted HCO3 transport in Anabaena variabilis, The effect was highly specific to this cation. Kinetic analysis indicated a progressive decrease in the Km (HCO3) of the transport system with increasing Na+ concentration. Vmax was also affected. We raise the possibility that the transport is a Na+-HCO3 symport; alternatively, that a Na+-H+ antiport (or Na+-OH+ symport) system mediates the efflux of the OH ions derived from the entering HCO3 ions, and that this antiport can rate-limit HCO3 influx.

Original languageEnglish
Pages (from-to)1090-1092
Number of pages3
JournalPlant Physiology
Issue number4
StatePublished - 1 Jan 1984
Externally publishedYes

ASJC Scopus subject areas

  • Physiology
  • Genetics
  • Plant Science


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