Cultivation conditions affect the monosaccharide composition in Ulva fenestrata
- PDF / 320,604 Bytes
- 9 Pages / 595.276 x 790.866 pts Page_size
- 74 Downloads / 194 Views
Cultivation conditions affect the monosaccharide composition in Ulva fenestrata Joakim Olsson 1 & Gunilla B. Toth 2 & Annelous Oerbekke 2 & Suzana Cvijetinovic 1 & Niklas Wahlström 3 Hanna Harrysson 4 & Sophie Steinhagen 2 & Alexandra Kinnby 2 & Joel White 2 & Ulrica Edlund 3 & Ingrid Undeland 4 & Henrik Pavia 2 & Eva Albers 1
&
Received: 28 January 2020 / Revised and accepted: 17 April 2020 # The Author(s) 2020
Abstract In recent years, the interest in using seaweed for the sustainable production of commodities has been increasing as seaweeds contain many potentially worthwhile compounds. Thus, the extraction and refining processes of interesting compounds from seaweeds is a hot research topic but has been found to have problems with profitability for novel applications. To increase the economic potential of refining seaweed biomass, the content of the compounds of interest should be maximized, which can potentially be achieved through optimization of cultivation conditions. In this study, we studied how the monosaccharide composition of the green seaweed species Ulva fenestrata is influenced by the abiotic factors; irradiance, temperature, nitrate, phosphate, and pCO2. It was evident that lower nitrate concentration and cultivation at elevated temperature increased monosaccharide contents. A 70% increase in iduronic acid and a 26% increase in rhamnose content were seen under elevated irradiance and temperature conditions, though the absolute differences in monosaccharide concentration were small. Irradiance and nitrate impacted the ratio between iduronic and rhamnose, which is an indicator of the ulvan structure. These results could potentially be utilized to coax the ulvan towards specific bioactivities, and thus have a considerable impact on a potential biorefinery centered around Ulva. Keywords Ulva fenestrata . Cultivation . Abiotic growth factors . Monosaccharides composition . Ulvan
Introduction To enable a more sustainable society, there is currently a push to find more sources of biomass for utilization in biorefineries. One type of biomass that has been receiving an increased interest in recent years is seaweed. Today only a few seaweed species are cultivated and/or harvested for direct use as food or
* Eva Albers [email protected] 1
Department Biology and Biological Engineering - Industrial Biotechnology, Chalmers University of Technology, SE-412 96 Göteborg, Sweden
2
Department Marine Sciences – Tjärnö, University of Gothenburg, SE-452 96 Strömstad, Sweden
3
Fibre and Polymer Technology, KTH Royal Institute of Technology, SE-100 44 Stockholm, Sweden
4
Department Biology and Biological Engineering-Food and Nutrition Science, Chalmers University of Technology, SE-412 96 Göteborg, Sweden
for extraction of hydrocolloidal polysaccharides. However, polysaccharides in seaweeds are diverse, and several are known to have interesting properties, but both technical and economic challenges remain before novel and economically sustainable business’ can form (Golberg et al. 2020). One group of species
Data Loading...
