Liesner, Daniel; Shama, Lisa N S; Diehl, Nora; Valentin, Klaus; Bartsch, Inka (2020): Thermal plasticity of Laminaria digitata - seasonal growth; recruitment; thermal physiology of juvenile sporophytes. PANGAEA, https://doi.org/10.1594/PANGAEA.917810
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We investigated effects of temperature during ontogeny of the kelp Laminaria digitata across haploid gametophyte and diploid sporophyte life cycle stages in 5 distinct genetic lines. We sampled meristematic discs from wild sporophytes on the island of Helgoland (North Sea; 54.1779 N, 7.8926 E) in May 2017, July 2017 and February 2018 and conducted a seasonal growth experiment at 5°C and 15°C over 14 days (experiment 1). Based on meiospores from five individuals (genetic lines) sampled in July 2017, we applied a full-factorial experimental design to generate different temperature histories by applying 5°C and 15°C during meiospore germination, gametogenesis of parental gametophytes and recruitment of offspring sporophytes (19-26 days; recruitment), and juvenile sporophyte rearing (91-122 days). We then tested for thermal plasticity among temperature history treatments at 5°C and 15°C in a final 12-day experiment assessing growth, the storage compound mannitol, carbon and nitrogen contents, and fluorometric responses in 3-4 month old sporophytes (experiment 2).
Liesner, Daniel; Shama, Lisa N S; Diehl, Nora; Valentin, Klaus; Bartsch, Inka (2020): Thermal plasticity of the kelp Laminaria digitata (Phaeophyceae) across life cycle stages reveals the importance of cold seasons for marine forests. Frontiers in Marine Science, https://doi.org/10.3389/fmars.2020.00456
German Science Foundation (DFG), grant/award no. 318182282: Functional Variability and Dynamics of Responses of Marine Forests to Global Change (MARFOR)
Latitude: 54.177900 * Longitude: 7.892600
Date/Time Start: 2017-05-10T00:00:00 * Date/Time End: 2018-02-04T00:00:00