Hörður Guðmundsson

ORCID: 0000-0003-0731-3141
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About
Contact & Profiles
Research Areas
  • Lichen and fungal ecology
  • Mycorrhizal Fungi and Plant Interactions
  • Seaweed-derived Bioactive Compounds
  • Plant Pathogens and Fungal Diseases
  • Allergic Rhinitis and Sensitization
  • Biofuel production and bioconversion
  • Carbohydrate Chemistry and Synthesis
  • Microbial Metabolites in Food Biotechnology
  • Environmental Impact and Sustainability
  • Genomics and Phylogenetic Studies
  • Natural product bioactivities and synthesis
  • Biochemical Analysis and Sensing Techniques
  • Microbial Community Ecology and Physiology
  • Credit Risk and Financial Regulations
  • Bacteriophages and microbial interactions
  • Bioeconomy and Sustainability Development
  • Chemokine receptors and signaling
  • Invertebrate Immune Response Mechanisms
  • Food Waste Reduction and Sustainability
  • Enzyme Production and Characterization
  • Bioactive Compounds and Antitumor Agents
  • Algal biology and biofuel production
  • Meat and Animal Product Quality
  • Forest Ecology and Biodiversity Studies
  • Agriculture Sustainability and Environmental Impact

Matís (Iceland)
2021-2025

University of Iceland
2021-2022

Abstract Lichen symbioses are thought to be stabilized by the transfer of fixed carbon from a photosynthesizing symbiont fungus. In other fungal symbioses, carbohydrate subsidies correlate with reductions in plant cell wall-degrading enzymes, but whether this is true lichen symbionts (LFSs) unknown. Here, we predict genes encoding carbohydrate-active enzymes (CAZymes) and sugar transporters 46 genomes Lecanoromycetes , largest extant clade LFSs. All LFSs possess robust CAZyme arsenal...

10.1038/s41467-022-30218-6 article EN cc-by Nature Communications 2022-05-12

Production of fish meal and plant-based feed proteins continues to increase meet the growing demand for seafood, leading impacts on marine terrestrial ecosystems. Microbial such as single-cell (SCPs) have been introduced alternatives since they can replace current ingredients, e.g., soybean, which are associated with negative environmental impacts. protein production also enables utilization grain processing side-streams feedstock sources. This study assesses yeast-based SCP using oat...

10.1016/j.scitotenv.2023.162318 article EN cc-by The Science of The Total Environment 2023-02-18
Arnthór Aevarsson Anna‐Karina Kaczorowska Björn Þór Aðalsteinsson Josefin Ahlqvist Salam Al‐Karadaghi and 87 more J. Altenbuchner Hasan Arsın Úlfur Áugúst Átlasson David Brandt Magdalena Cichowicz-Cieślak Katy A. S. Cornish Jérémy Courtin Sławomir Da̧browski Håkon Dahle Samia Djeffane Sebastian Dorawa Julia Dusaucy François Enault Anita‐Elin Fedöy Stefanie Freitag‐Pohl Ólafur H. Friðjónsson Clovis Galiez Eirin Glomsaker Mickaël Guérin Sigurd Eidem Gundesø Elísabet Eik Guðmundsdóttir Hörður Guðmundsson M. Håkansson Christian Henke Alexandra Helleux Jørn Remi Henriksen Sigrídur Hjörleifdóttir Guðmundur Ó. Hreggviðsson Andrius Jasilionis Annika Jochheim Ilmur Jónsdóttir Lilja Björk Jónsdóttir Agata Jurczak-Kurek Tadeusz Kaczorowski Jörn Kalinowski Łukasz Kozłowski Mart Krupovìč Karolina Kwiatkowska-Semrau Olav Lanes Joanna Lange Julien Lebrat Javier A. Linares‐Pastén Ying Liu Steffen A Lorentsen Tobias Lutterman Thibaud Mas William Merré Milot Mirdita Agnieszka Morzywołek Éric Olo Ndela Eva Nordberg Karlsson Edda Olgudóttir Cathrine Pedersen Francine B. Perler Sólveig K. Pétursdóttir Magdalena Płotka Ehmke Pohl David Prangishvili Jessica Louise Ray Birkir Reynisson Tara Róbertsdóttir Ruth‐Anne Sandaa Alexander Sczyrba Sigurlaug Skírnisdóttir Johannes Söding Terese Solstad Ida Helene Steen Sigmar K. Stefánsson Martin Steinegger Katrine Stange Overå Bernd Striberny Anders Svensson Monika Szadkowska Emma Tarrant Paul Terzian Mathilde Tourigny Tom van den Bergh Justine Vanhalst Jonathan Vincent Bas Vroling Björn Walse Lei Wang Hildegard Watzlawick M. Welin Olesia Werbowy Ewa Wons Ruoshi Zhang

The Virus-X-Viral Metagenomics for Innovation Value-project was a scientific expedition to explore and exploit uncharted territory of genetic diversity in extreme natural environments such as geothermal hot springs deep-sea ocean ecosystems. Specifically, the project set analyse viral metagenomes with ultimate goal developing new gene products high innovation value applications biotechnology, pharmaceutical, medical, life science sectors. Viral pool analysis is also essential obtain...

10.1093/femsle/fnab067 article EN FEMS Microbiology Letters 2021-06-01

Photosymbiodemes are a special case of lichen symbiosis where one lichenized fungus engages in with two different photosynthetic partners, cyanobacterium and green alga, to develop distinctly looking photomorphs. We compared gene expression thallus sectors the photosymbiodeme-forming Peltigera britannica containing cyanobacterial photobionts both algal investigated differential at temperatures representing mild putatively stressful conditions. First, we quantified photobiont-mediated...

10.1111/mec.16814 article EN cc-by-nc Molecular Ecology 2022-12-07

Seaweeds (macroalgae) are an attractive resource for diverse microbial- and enzymatic production processes. They abundant, underutilized, cheap, rich in carbohydrates, therefore have the potential to be used as a source of mono- or oligosaccharides, substrates industrial fermentation Many seaweed polysaccharides, including sulfated polysaccharides ulvan fucoidan, however complex heterogenous structure, there currently few enzymes available modify them, understanding their depolymerization...

10.1016/j.enzmictec.2024.110528 article EN cc-by-nc-nd Enzyme and Microbial Technology 2024-10-16

Werth, S., Reynisdóttir, Guðmundsson, H. & Andrésson, Ó. S. 2016. A fast and inexpensive high-throughput protocol for isolating high molecular weight genomic DNA from lichens. — Herzogia 29: 610–616.Isolating as required library preparations other applications is a challenging task. We optimized glass-fiber column-based, throughput isolation to yield comparatively large quantities of weight, pure DNA; cell lysis based on CTAB buffer was followed by centrifugation remove debris, binding...

10.13158/heia.29.2.2016.610 article EN Herzogia 2016-12-01

Sulfation is gaining increased interest due to the role of sulfate in bioactivity many polysaccharides marine origin. Hence, sulfatases, enzymes that control degree sulfation, are being more extensively researched. In this work, a novel sulfatase (SulA1) encoded by gene sulA1 was characterized. The sulA1-gene located upstream chondroitin lyase encoding genome Arthrobacter strain (MAT3885). produced Escherichia coli. Based on primary sequence, enzyme classified under family 1 and two...

10.3390/md22030104 article EN cc-by Marine Drugs 2024-02-23

Photosymbiodemes are a special case of lichen symbiosis where one lichenized fungus engages in with two different photosynthetic partners, cyanobacterium and green alga, to develop distinctly looking photomorphs. We investigated differential gene expression photosymbiodemes the Peltigera britannica at temperatures representing mild putatively stressful conditions compared thallus sectors containing cyanobacterial photobionts both algal photobionts. Firstly, because known ecological...

10.22541/au.166004672.28025918/v1 preprint EN Authorea (Authorea) 2022-08-09

Production of fish meal and plant-based feed proteins continues to increase meet the growing demand for seafood, leading impacts on marine terrestrial ecosystems. Microbial such as single-cell (SCPs) have been introduced alternatives they can replace current ingredients, soybean, which are associated with negative environmental impacts. protein production also enables utilization grain processing side-streams feedstock sources. This study assesses yeast-based SCP using oat side-stream...

10.2139/ssrn.4293065 article EN SSRN Electronic Journal 2022-01-01

Abstract Lichen symbioses are generally thought to be stabilized by the transfer of fixed carbon compounds from a photosynthesizing unicellular symbiont fungus. In other fungal symbioses, carbohydrate subsidies correlate with genomic reductions in number genes for plant cell wall-degrading enzymes (PCWDEs), but whether this is case lichen symbionts (LFSs) unknown. We predicted encoding carbohydrate-active (CAZymes) and sugar transporters 17 existing 29 newly sequenced genomes across class...

10.1101/2021.08.01.454614 preprint EN cc-by-nc bioRxiv (Cold Spring Harbor Laboratory) 2021-08-02
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