Universität zu Köln

Li, Huiru ORCID: 0000-0002-3359-8251, Monteiro, Catia ORCID: 0000-0002-5392-072X, Heinrich, Sandra, Bartsch, Inka, Valentin, Klaus, Harms, Lars, Gloeckner, Gernot, Corre, Erwan and Bischof, Kai (2020). Responses of the kelp Saccharina latissima (Phaeophyceae) to the warming Arctic: from physiology to transcriptomics. Physiol. Plant., 168 (1). S. 5 - 27. HOBOKEN: WILEY. ISSN 1399-3054

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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 [S-A] 20 and 30) after a 7-day pre-acclimation at three temperatures (0, 8 and 15 degrees 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 degrees C - S-A 30), the 8 degrees C - S-A 20 exhibited the highest number of differentially expressed genes (DEGs), followed by the 0 degrees C - S-A 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 degrees 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.

Item Type:	Journal Article
Creators:	Creators Email ORCID ORCID Put Code Li, Huiru UNSPECIFIED orcid.org/0000-0002-3359-8251 UNSPECIFIED Monteiro, Catia UNSPECIFIED orcid.org/0000-0002-5392-072X UNSPECIFIED Heinrich, Sandra UNSPECIFIED UNSPECIFIED UNSPECIFIED Bartsch, Inka UNSPECIFIED UNSPECIFIED UNSPECIFIED Valentin, Klaus UNSPECIFIED UNSPECIFIED UNSPECIFIED Harms, Lars UNSPECIFIED UNSPECIFIED UNSPECIFIED Gloeckner, Gernot UNSPECIFIED UNSPECIFIED UNSPECIFIED Corre, Erwan UNSPECIFIED UNSPECIFIED UNSPECIFIED Bischof, Kai UNSPECIFIED UNSPECIFIED UNSPECIFIED
URN:	urn:nbn:de:hbz:38-144684
DOI:	10.1111/ppl.13009
Journal or Publication Title:	Physiol. Plant.
Volume:	168
Number:	1
Page Range:	S. 5 - 27
Date:	2020
Publisher:	WILEY
Place of Publication:	HOBOKEN
ISSN:	1399-3054
Language:	English
Faculty:	Unspecified
Divisions:	Unspecified
Subjects:	no entry
Uncontrolled Keywords:	Keywords Language HEAT-SHOCK PROTEINS; LAMINARIA-DIGITATA; OXIDATIVE STRESS; UV-RADIATION; MARINE ALGA; HIGH LIGHT; PHOTOSYNTHETIC PERFORMANCE; ECOPHYSIOLOGICAL PATTERNS; BIOCHEMICAL-COMPOSITION; SALINITY TOLERANCE Multiple languages Plant Sciences Multiple languages
Refereed:	Yes
URI:	http://kups.ub.uni-koeln.de/id/eprint/14468