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

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 (Hodějovický fishpond) was i...

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Bibliographic Details
Published in:Journal of plankton research 2008-11, Vol.30 (11), p.1257-1269
Main Authors: Zapomělová, Eliška, Hisem, Daniel, Řeháková, Klára, Hrouzek, Pavel, Jezberová, Jitka, Komárková, Jaroslava, Korelusová, Jana, Znachor, Petr
Format: Article
Language:English
Subjects:
Anabaena
Anabaena circinalis
Animal and plant ecology
Animal, plant and microbial ecology
Biological and medical sciences
Coiling
Cyanobacteria
Cyanophyta
Dimensions
Environmental conditions
Fish ponds
Fundamental and applied biological sciences. Psychology
General aspects
Genetic variability
Light intensity
Metabolites
New records
Phenotypic plasticity
Phosphorus
rRNA 16S
Strains
Synecology
Temperature
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Summary: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 (Hodějovický 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.
ISSN:0142-7873
1464-3774
DOI:10.1093/plankt/fbn081