Effect of orthophosphate and bioavailability of dissolved organic phosphorous compounds to typically harmful cyanobacterium Microcystis aeruginosa

Mar Pollut Bull. 2015 Mar 15;92(1-2):52-58. doi: 10.1016/j.marpolbul.2015.01.001. Epub 2015 Jan 24.

Abstract

Results show that Microcystis aeruginosa can utilize both dissolved organic phosphorus (DOP) and orthophosphate (DIP) even under low phosphorus (P) conditions to sustain its growth. Total P concentrations decreased markedly in all three P source treatments. Alkaline phosphatase activity (APA) in the different P sources tested changed in response to the DOP and DIP. The APA of DOP groups remained low after decreasing significantly, but the APA in the DIP treatments remained high during the period of culture. Changes in APA at different PO4(3-)-P concentrations in a culture medium revealed negative correlations between APA and DIP. However, a positive relationship was observed between APA and DOP under low P concentrations. These findings indicate that M. aeruginosa can regulate its physiological metabolism to acclimate to low ambient DIP environments.

Keywords: Alkaline phosphatase; Dissolved organic phosphorus; Microcystis aeruginosa; Phosphorus depletion.

Publication types

  • Research Support, Non-U.S. Gov't

MeSH terms

  • Acclimatization
  • Alkaline Phosphatase / metabolism
  • Biological Availability
  • Culture Media
  • Microcystis / growth & development*
  • Microcystis / metabolism*
  • Phosphates / metabolism
  • Phosphates / pharmacokinetics*
  • Phosphorus / metabolism

Substances

  • Culture Media
  • Phosphates
  • Phosphorus
  • Alkaline Phosphatase