Journal of Applied Phycology

, Volume 28, Issue 3, pp 1543–1552 | Cite as

Roles of nitrogen and phosphorus in growth responses and toxin production (using LC-MS/MS) of tropical Microcystis ichthyoblabe and M. flos-aquae

  • Maxine A. D. Mowe
  • Feras Abbas
  • Cristina Porojan
  • Simon M. Mitrovic
  • Richard P. Lim
  • Ambrose Furey
  • Darren C. J. YeoEmail author


In experiments investigating nutrient effects on tropical Microcystis, increasing nitrogen and phosphorus concentrations were found to have a significant positive effect on maximum cell yields of two strains of Microcystis ichthyoblabe (from Lower Peirce and Tengeh Reservoirs) and one strain of Microcystis flos-aquae isolated (Lower Peirce Reservoir) from Singapore. However, only increasing nitrogen concentration had a positive effect on growth rates of M. ichthyoblabe and M. flos-aquae from Lower Peirce Reservoir. MC-RR and MC-LR were produced by all three strains with MC-RR being the dominant variant. Phosphorus played an important role in MC production with increases in phosphorus from medium to high concentrations leading to decreases in MC-RR cell quotas for all three strains at the two highest nitrogen levels tested. The different growth and toxin production responses between M. ichthyoblabe strains could be due to location-specific differences.


Blooms Cyanobacteria Microcystins Nutrients Singapore 



Funding support for this study was provided by a research grant from the Public Utilities Board of Singapore (National University of Singapore Grant No. R-154-000-523-490), an AcRF Tier 1 grant from the Singapore Ministry of Education (National University of Singapore Grant No. R-154-000-465-133), and the National University of Singapore Industrial Postgraduate Program. Both of the CIT postgraduates (FA and CP) contributed equally to CITs input to this manuscript.


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Copyright information

© Springer Science+Business Media Dordrecht 2015

Authors and Affiliations

  • Maxine A. D. Mowe
    • 1
  • Feras Abbas
    • 2
  • Cristina Porojan
    • 2
  • Simon M. Mitrovic
    • 1
    • 3
  • Richard P. Lim
    • 3
  • Ambrose Furey
    • 2
  • Darren C. J. Yeo
    • 1
    Email author
  1. 1.Department of Biological SciencesNational University of SingaporeSingaporeSingapore
  2. 2.Mass Spectrometry Research Centre (MSRC), Department of Physical SciencesCork Institute of Technology (CIT)BishopstownIreland
  3. 3.School of the EnvironmentUniversity of Technology, SydneyBroadwayAustralia

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