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JPR Advance Access originally published online on August 2, 2008
Journal of Plankton Research 2008 30(11):1257-1269; doi:10.1093/plankt/fbn081
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© The Author 2008. Published by Oxford University Press. All rights reserved. For permissions, please email: journals.permissions@oxfordjournals.org

Experimental comparison of phenotypical plasticity and growth demands of two strains from the Anabaena circinalis/A. crassa complex (cyanobacteria)

Eliska Zapomelová1,2,*, Daniel Hisem1,3, Klára Reháková2,4, Pavel Hrouzek1,3,5, Jitka Jezberová2, Jaroslava Komárková1,2, Jana Korelusová1,2 and Petr Znachor1,2

1 University of South Bohemia, Faculty of Science, Branisovská 31, CZ-37005 Ceské Budejovice, Czech Republic 2 Biology Centre of AS CR, Institute of Hydrobiology, Na Sádkách 7, CZ-37005 Ceské Budejovice, Czech Republic 3 Department of Autotrophic Microorganisms, Institute of Microbiology, AS CR, Opatovicky mlyn, CZ-379 81, Trebon, Czech Republic 4 Institute of Botany, AS CR, Dukelská 135, CZ-37982 Trebon, Czech Republic 5 Institute of Physical Biology, Zámek 136, CZ-37333 Nové Hrady, Czech Republic

* CORRESPONDING AUTHOR: eliska.zapomelova{at}seznam.cz

Received on April 25, 2008; accepted on July 31, 2008


  Abstract

Two cyanobacterial strains were isolated in 2004 from different localities in the Czech Republic. Field morphology of the strain 04-26 (Jesenice reservoir) matched with the species description of Anabaena crassa (Lemm.) Kom.-Legn. et Cronb. 1992, whereas the strain 04-28 (Hodejovicky fishpond) was identified as A. circinalis Rabenh. ex Born. et Flah. 1888. Both these strains, exposed to various experimental conditions (temperature, light intensity, nitrogen and phosphorus concentration), displayed highly similar morphologies and spanned the morphological variability of both of the above-mentioned species. Significant relationships between environmental conditions (temperature, phosphorus) and morphological characteristics (vegetative cell and heterocyte dimensions, trichome coiling parameters) have been recorded for the first time within the genus Anabaena. The strains studied differed in their temperature and light growth optima and in secondary metabolite contents. However, both were identical (100% similarity) in their 16S rRNA gene sequence and showed 99.9–100% similarity to the published 16S rRNA sequences of A. circinalis strains from northern Europe.

Corresponding editor: William Li


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