Spatial divergence in the proportions of genes encoding toxic peptide synthesis among populations of the cyanobacterium Planktothrix in European lakes

Kurmayer, Rainer, Schober, Eva, Tonk, Linda, Visser, Petra M. and Christiansen, Guntram (2011) Spatial divergence in the proportions of genes encoding toxic peptide synthesis among populations of the cyanobacterium Planktothrix in European lakes. Fems Microbiology Letters, 317 2: 127-137. doi:10.1111/j.1574-6968.2011.02222.x


Author Kurmayer, Rainer
Schober, Eva
Tonk, Linda
Visser, Petra M.
Christiansen, Guntram
Title Spatial divergence in the proportions of genes encoding toxic peptide synthesis among populations of the cyanobacterium Planktothrix in European lakes
Formatted title
Spatial divergence in the proportions of genes encoding toxic peptide synthesis among populations of the cyanobacterium Planktothrix in European lakes
Journal name Fems Microbiology Letters   Check publisher's open access policy
ISSN 1574-6968
0378-1097
Publication date 2011-04-01
Sub-type Article (original research)
DOI 10.1111/j.1574-6968.2011.02222.x
Open Access Status DOI
Volume 317
Issue 2
Start page 127
End page 137
Total pages 11
Place of publication Chichester, West Sussex, United Kingdom
Publisher Wiley-Blackwell
Language eng
Formatted abstract
It has been frequently reported that seasonal changes in toxin production by cyanobacteria are due to changes in the proportion of toxic/nontoxic genotypes in parallel to increases or decreases in population density during the seasonal cycle of bloom formation. In order to find out whether there is a relationship between the proportion of genes encoding toxic peptide synthesis and population density of Planktothrix spp. we compared the proportion of three gene regions that are indicative of the synthesis of the toxic heptapeptide microcystin (mcyB), and the bioactive peptides aeruginoside (aerB) and anabaenopeptin (apnC) in samples from 23 lakes of five European countries (n=153). The mcyB, aerB, and apnC genes occurred in 99%, 99%, and 97% of the samples, respectively, and on average comprised 60 ± 3%, 22 ± 2%, and 54 ± 4% of the total population, respectively. Although the populations differed widely in abundance (10−3–103 mm3 L−1) no dependence of the proportion of the mcyB, aerB, and apnC genes on the density of the total population was found. In contrast populations differed significantly in their average mcyB, aerB, and apnC gene proportions, with no change between prebloom and bloom conditions. These results emphasize stable population-specific differences in mcyB, aerB, and apnC proportions that are independent from seasonal influences.
Keyword Cyanotoxins
Eutrophication
Planktothrix
qPCR
Q-Index Code C1
Q-Index Status Provisional Code
Institutional Status UQ

Document type: Journal Article
Sub-type: Article (original research)
Collection: Global Change Institute Publications
 
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Created: Fri, 02 May 2014, 19:29:12 EST by Linda Tonk on behalf of School of Biological Sciences