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Depth-specific fluctuations of gene expression and protein abundance modulate the photophysiology in the seagrass Posidonia oceanica
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Number of Authors: 242017 (English)In: Scientific Reports, ISSN 2045-2322, E-ISSN 2045-2322, Vol. 7, article id 42890Article in journal (Refereed) Published
Abstract [en]

Here we present the results of a multiple organizational level analysis conceived to identify acclimative/adaptive strategies exhibited by the seagrass Posidonia oceanica to the daily fluctuations in the light environment, at contrasting depths. We assessed changes in photophysiological parameters, leaf respiration, pigments, and protein and mRNA expression levels. The results show that the diel oscillations of P. oceanica photophysiological and respiratory responses were related to transcripts and proteins expression of the genes involved in those processes and that there was a response asynchrony between shallow and deep plants probably caused by the strong differences in the light environment. The photochemical pathway of energy use was more effective in shallow plants due to higher light availability, but these plants needed more investment in photoprotection and photorepair, requiring higher translation and protein synthesis than deep plants. The genetic differentiation between deep and shallow stands suggests the existence of locally adapted genotypes to contrasting light environments. The depth-specific diel rhythms of photosynthetic and respiratory processes, from molecular to physiological levels, must be considered in the management and conservation of these key coastal ecosystems.

Place, publisher, year, edition, pages
2017. Vol. 7, article id 42890
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Biological Sciences
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URN: urn:nbn:se:su:diva-141411DOI: 10.1038/srep42890ISI: 000394269400001PubMedID: 28211527OAI: oai:DiVA.org:su-141411DiVA, id: diva2:1089455
Available from: 2017-04-19 Created: 2017-04-19 Last updated: 2017-04-19Bibliographically approved

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Björk, MatsGullström, MartinRasmusson, Lina M.
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