We found a match
Your institution may have access to this item. Find your institution then sign in to continue.
- Title
Responses of the kelp Saccharina latissima (Phaeophyceae) to the warming Arctic: from physiology to transcriptomics.
- Authors
Li, Huiru; Monteiro, Cátia; Heinrich, Sandra; Bartsch, Inka; Valentin, Klaus; Harms, Lars; Glöckner, Gernot; Corre, Erwan; Bischof, Kai
- Abstract
The Arctic region is currently facing substantial environmental changes due to global warming. Melting glaciers cause reduced salinity environments in coastal Arctic habitats, which may be stressful for kelp beds. To investigate the responses of the kelp Saccharina latissima to the warming Arctic, we studied the transcriptomic changes of S. latissima from Kongsfjorden (Svalbard, Norway) over a 24‐hour exposure to two salinities (Absolute Salinity [SA] 20 and 30) after a 7‐day pre‐acclimation at three temperatures (0, 8 and 15°C). In addition, corresponding physiological data were assessed during an 11‐days salinity/temperature experiment. Growth and maximal quantum yield for photosystem II fluorescence were positively affected by increased temperature during acclimation, whereas hyposalinity caused negative effects at the last day of treatment. In contrast, hyposalinity induced marked changes on the transcriptomic level. Compared to the control (8°C – SA 30), the 8°C – SA 20 exhibited the highest number of differentially expressed genes (DEGs), followed by the 0°C – SA 20. Comparisons indicate that S. latissima tends to convert its energy from primary metabolism (e.g. photosynthesis) to antioxidant activity under hyposaline stress. The increase in physiological performance at 15°C shows that S. latissima in the Arctic region can adjust and might even benefit from increased temperatures. However, in Arctic fjord environments its performance might become impaired by decreased salinity as a result of ice melting.
- Subjects
LAMINARIA; GLOBAL environmental change; SACCHARINA; BROWN algae; GLACIAL melting; KELPS
- Publication
Physiologia Plantarum, 2020, Vol 168, Issue 1, p5
- ISSN
0031-9317
- Publication type
Article
- DOI
10.1111/ppl.13009