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dc.contributor.advisorEilertsen, Hans Christian
dc.contributor.advisorGusarova, Galina
dc.contributor.authorUradnikova, Martina
dc.date.accessioned2020-05-20T08:26:08Z
dc.date.available2020-05-20T08:26:08Z
dc.date.issued2020-02-15
dc.description.abstractRelevant taxonomical morphological characters of five common spring bloom centric diatoms, preliminary identified as Attheya longicornis Crawford & Gardner, Chaetoceros furcellatus Yendo, Porosira glacialis Jørgensen, Coscinodiscus sp. and Skeletonema marinoi Sarno & Zingone were observed and described using light and scanning electron microscope. Further, samples of cultured diatoms were sent to the Canadian centre of DNA Barcoding (CCDB) for DNA extraction, PCR and sequencing. Out of five submitted replicates for each species, CCDB gained five sequences of Attheya strain nr. 20.2, two sequences of Chaetoceros strain nr. 61 and one sequence of Porosira strain nr. 201 based on marker of rbcL gene from chloroplast. One sequence of Skeletonema strain nr. 204 resulted from sequencing of 16S rRNA gene. Sequencing was not successful for Coscinodiscus strain nr. 203. According to results from the morphologic examination, with some uncertainty, it is possible to conclude that strain nr. 20.2 is Attheya longicornis. Chaetoceros strain nr. 61 is estimated to be Ch. furcellatus, but it is not possible to identify certainly due to missing SEM images of spores and missing appropriate phylogenetic data. Porosira strain nr. 201 is Porosira glacialis, mainly based on morphologic description, with indication from molecular survey. Coscinodiscus strain nr. 203 is Coscinodiscus concinnus and Skeletonema strain nr. 204 is Skeletonema marinoi. Both last named species were identified only according to morphologic features. Using reference DNA sequences available in the GenBank, it was possible to demonstrate that rbcL gene from chloroplast is a promising marker for DNA barcoding of diatoms, as many species were found in strongly supported monophylectic groups on the rbcL phylogeny, necessarily to remind that the periodic reconciliation of up to date scientific publications on diatom taxonomy is inevitable in order to perform proper taxonomic classification.en_US
dc.identifier.urihttps://hdl.handle.net/10037/18343
dc.language.isoengen_US
dc.publisherUiT Norges arktiske universiteten_US
dc.publisherUiT The Arctic University of Norwayen_US
dc.rights.accessRightsopenAccessen_US
dc.rights.holderCopyright 2020 The Author(s)
dc.rights.urihttps://creativecommons.org/licenses/by-nc-sa/4.0en_US
dc.rightsAttribution-NonCommercial-ShareAlike 4.0 International (CC BY-NC-SA 4.0)en_US
dc.subject.courseIDBIO-3950
dc.subjectVDP::Matematikk og Naturvitenskap: 400::Zoologiske og botaniske fag: 480::Marinbiologi: 497en_US
dc.subjectVDP::Mathematics and natural science: 400::Zoology and botany: 480::Marine biology: 497en_US
dc.subjectAttheya longicornisen_US
dc.subjectChaetoceros furcellatusen_US
dc.subjectPorosira glacialisen_US
dc.subjectCoscinodiscus concinnusen_US
dc.subjectSkeletonema marinoien_US
dc.subjectdiatomsen_US
dc.subjecttaxonomyen_US
dc.subjectDNA barcodingen_US
dc.titleSpecies validity of five common northern/Arctic spring bloom diatoms: a combined morphological and molecular studyen_US
dc.typeMaster thesisen_US
dc.typeMastergradsoppgaveen_US


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Attribution-NonCommercial-ShareAlike 4.0 International (CC BY-NC-SA 4.0)
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