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    Pyrosequencing and de novo assembly of Antarctic krill (Euphausia superba) transcriptome to study the adaptability of krill to climate-induced environmental changes

    Access Status
    Fulltext not available
    Authors
    Meyer, B.
    Martini, P.
    Biscontin, A.
    De Pittà, C.
    Romualdi, C.
    Teschke, M.
    Frickenhaus, S.
    Harms, L.
    Freier, U.
    Jarman, Simon
    Kawaguchi, S.
    Date
    2015
    Type
    Journal Article
    
    Metadata
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    Citation
    Meyer, B. and Martini, P. and Biscontin, A. and De Pittà, C. and Romualdi, C. and Teschke, M. and Frickenhaus, S. et al. 2015. Pyrosequencing and de novo assembly of Antarctic krill (Euphausia superba) transcriptome to study the adaptability of krill to climate-induced environmental changes. Molecular Ecology Resources. 15 (6): pp. 1460-1471.
    Source Title
    Molecular Ecology Resources
    DOI
    10.1111/1755-0998.12408
    ISSN
    1755-098X
    School
    School of Molecular and Life Sciences (MLS)
    URI
    http://hdl.handle.net/20.500.11937/72865
    Collection
    • Curtin Research Publications
    Abstract

    © 2015 John Wiley & Sons Ltd. The Antarctic krill, Euphausia superba, has a key position in the Southern Ocean food web by serving as direct link between primary producers and apex predators. The south-west Atlantic sector of the Southern Ocean, where the majority of the krill population is located, is experiencing one of the most profound environmental changes worldwide. Up to now, we have only cursory information about krill's genomic plasticity to cope with the ongoing environmental changes induced by anthropogenic CO2emission. The genome of krill is not yet available due to its large size (about 48 Gbp). Here, we present two cDNA normalized libraries from whole krill and krill heads sampled in different seasons that were combined with two data sets of krill transcriptome projects, already published, to produce the first knowledgebase krill 'master' transcriptome. The new library produced 25% more E. superba transcripts and now includes nearly all the enzymes involved in the primary oxidative metabolism (Glycolysis, Krebs cycle and oxidative phosphorylation) as well as all genes involved in glycogenesis, glycogen breakdown, gluconeogenesis, fatty acid synthesis and fatty acids ß-oxidation. With these features, the 'master' transcriptome provides the most complete picture of metabolic pathways in Antarctic krill and will provide a major resource for future physiological and molecular studies. This will be particularly valuable for characterizing the molecular networks that respond to stressors caused by the anthropogenic CO2emissions and krill's capacity to cope with the ongoing environmental changes in the Atlantic sector of the Southern Ocean.

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