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NEW POTENTIALLY TOXIC PSEUDO-NITZSHIA SPECIES (BACILLARIOPHYCEAE) IDENTIFIED BY MOLECULAR APPROACH IN THE BLACK SEA (VARNA BAY)

Nina Dzhembekova, Prof. Dr. Ivan Atanasov, Assoc. Prof. Dr. Petya Ivanova, Prof. Dr. Snejana Moncheva

First published: 2017-06-20https://doi.org/10.5593/sgem2017/31/s15.112View metrics

Abstract

The potentially toxic genus Pseudo-nitzschia H.Peragallo, 1900 is common for the phytoplankton community in the Bulgarian part of the Black Sea often proliferating to bloom densities. The highly similar morphological features hamper the precise species discrimination by light microscopy and an accurate identification requires the application of more sophisticated methods. In this study we used genus specific large subunits ribosomal DNA (LSU rDNA) primer pair in order to elucidate the species diversity within Pseudo-nitzschia in Varna Bay. Three Pseudo-nitzschia species (four distinct ribotypes) were found in the constructed from environmental samples clone libraries. Molecular data were compared with light microscopy counts. This is the first detection of P. linea Lundholm, Hasle and G.A.Fryxell, 2002 in the Black Sea and first confirmation of presence of P. calliantha Lundholm, Moestrup & Hasle, 2003 and P. pungens var. aveirensis Lundholm, Churro, Carreira & Calado, 2009 in Bulgarian waters. The results from this preliminary study are in support of the potential of molecular analysis as a powerful approach for clarifying Pseudo-nitzschia taxonomic diversity in Bulgarian Black Sea waters.

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Publication details

Title
NEW POTENTIALLY TOXIC PSEUDO-NITZSHIA SPECIES (BACILLARIOPHYCEAE) IDENTIFIED BY MOLECULAR APPROACH IN THE BLACK SEA (VARNA BAY)
Authors
Nina Dzhembekova, Prof. Dr. Ivan Atanasov, Assoc. Prof. Dr. Petya Ivanova, Prof. Dr. Snejana Moncheva
Proceedings
SGEM International Multidisciplinary Scientific GeoConference EXPO Proceedings; 17th International Multidisciplinary Scientific GeoConference SGEM2017, Water Resources. Forest, Marine and Ocean Ecosystems
Publisher
STEF92 Technology
Year
2017
Pages
889-896
SWS Citekey
Dzhembekova201715889896
ISSN
1314-2704
ISBN
978-619-7408-04-1
Language
en
Publication type
Conference Paper
Keywords
Bulgarian Black Sea coastclone librariesenvironmental DNAgenus-specific LSU rDNA primersPseudo-nitzschia
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