Universität zu Köln

Rippin, Martin ORCID: 0000-0003-4362-0122, Pichrtova, Martina ORCID: 0000-0002-6003-9666, Arc, Erwann, Kranner, Ilse ORCID: 0000-0003-4959-9109, Becker, Burkhard ORCID: 0000-0002-7965-1396 and Holzinger, Andreas ORCID: 0000-0002-7745-3978 (2019). Metatranscriptomic and metabolite profiling reveals vertical heterogeneity within a Zygnema green algal mat from Svalbard (High Arctic). Environ. Microbiol., 21 (11). S. 4283 - 4300. HOBOKEN: WILEY. ISSN 1462-2920

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Abstract

Within streptophyte green algae Zygnematophyceae are the sister group to the land plants that inherited several traits conferring stress protection. Zygnema sp., a mat-forming alga thriving in extreme habitats, was collected from a field site in Svalbard, where the bottom layers are protected by the top layers. The two layers were investigated by a metatranscriptomic approach and GC-MS-based metabolite profiling. In the top layer, 6569 genes were significantly upregulated and 149 were downregulated. Upregulated genes coded for components of the photosynthetic apparatus, chlorophyll synthesis, early light-inducible proteins, cell wall and carbohydrate metabolism, including starch-degrading enzymes. An increase in maltose in the top layer and degraded starch grains at the ultrastructural levels corroborated these findings. Genes involved in amino acid, redox metabolism and DNA repair were upregulated. A total of 29 differentially accumulated metabolites (out of 173 identified ones) confirmed higher metabolic turnover in the top layer. For several of these metabolites, differential accumulation matched the transcriptional changes of enzymes involved in associated pathways. In summary, the findings support the hypothesis that in a Zygnema mat the top layer shields the bottom layers from abiotic stress factors such as excessive irradiation.

Item Type:	Journal Article
Creators:	Creators Email ORCID ORCID Put Code Rippin, Martin UNSPECIFIED orcid.org/0000-0003-4362-0122 UNSPECIFIED Pichrtova, Martina UNSPECIFIED orcid.org/0000-0002-6003-9666 UNSPECIFIED Arc, Erwann UNSPECIFIED UNSPECIFIED UNSPECIFIED Kranner, Ilse UNSPECIFIED orcid.org/0000-0003-4959-9109 UNSPECIFIED Becker, Burkhard UNSPECIFIED orcid.org/0000-0002-7965-1396 UNSPECIFIED Holzinger, Andreas UNSPECIFIED orcid.org/0000-0002-7745-3978 UNSPECIFIED
URN:	urn:nbn:de:hbz:38-141500
DOI:	10.1111/1462-2920.14788
Journal or Publication Title:	Environ. Microbiol.
Volume:	21
Number:	11
Page Range:	S. 4283 - 4300
Date:	2019
Publisher:	WILEY
Place of Publication:	HOBOKEN
ISSN:	1462-2920
Language:	English
Faculty:	Faculty of Mathematics and Natural Sciences
Divisions:	Faculty of Mathematics and Natural Sciences > Department of Biology > Botanical Institute
Subjects:	no entry
Uncontrolled Keywords:	Keywords Language HEAT-SHOCK PROTEINS; ULTRAVIOLET-RADIATION; QUALITY-CONTROL; LIGHT STRESS; FRESH-WATER; SOIL CRUST; STREPTOPHYTA; EVOLUTION; ZYGNEMATOPHYCEAE; LAND Multiple languages Microbiology Multiple languages
Refereed:	Yes
URI:	http://kups.ub.uni-koeln.de/id/eprint/14150