Are all ulvans equal? A comparative assessment of the chemical and gelling properties of ulvan from blade and filamentous Ulva.

Autor: Kidgell JT; MACRO - The Centre for Macroalgal Resources and Biotechnology, College of Science and Engineering, James Cook University, Townsville, 4811, Australia. Electronic address: joel.kidgell@my.jcu.edu.au., Carnachan SM; The Ferrier Research Institute, Victoria University of Wellington, Wellington, 6012, New Zealand. Electronic address: susie.carnachan@vuw.ac.nz., Magnusson M; Environmental Research Institute, School of Science, University of Waikato, Tauranga, 3110, New Zealand. Electronic address: marie.magnusson@waikato.ac.nz., Lawton RJ; Environmental Research Institute, School of Science, University of Waikato, Tauranga, 3110, New Zealand. Electronic address: rebecca.lawton@waikato.ac.nz., Sims IM; The Ferrier Research Institute, Victoria University of Wellington, Wellington, 6012, New Zealand. Electronic address: ian.sims@vuw.ac.nz., Hinkley SFR; The Ferrier Research Institute, Victoria University of Wellington, Wellington, 6012, New Zealand. Electronic address: simon.hinkley@vuw.ac.nz., de Nys R; MACRO - The Centre for Macroalgal Resources and Biotechnology, College of Science and Engineering, James Cook University, Townsville, 4811, Australia. Electronic address: rocky.denys@jcu.edu.au., Glasson CRK; Environmental Research Institute, School of Science, University of Waikato, Tauranga, 3110, New Zealand. Electronic address: christopher.glasson@waikato.ac.nz.
Jazyk: angličtina
Zdroj: Carbohydrate polymers [Carbohydr Polym] 2021 Jul 15; Vol. 264, pp. 118010. Date of Electronic Publication: 2021 Apr 02.
DOI: 10.1016/j.carbpol.2021.118010
Abstrakt: Green seaweeds of the genus Ulva are rich in the bioactive sulfated polysaccharide ulvan. Herein we characterise ulvan from Ulva species collected from the Bay of Plenty, Aotearoa New Zealand. Using standardised procedures, we quantified, characterised, and compared ulvans from blade (U. australis, U. rigida, U. sp. B, and Ulva sp.) and filamentous (U. flexuosa, U. compressa, U. prolifera, and U. ralfsii) Ulva species. There were distinct differences in composition and structure of ulvans between morphologies. Ulvan isolated from blade species had higher yields (14.0-19.3 %) and iduronic acid content (IdoA = 7-18 mol%), and lower molecular weight (Mw = 190-254 kDa) and storage moduli (G' = 0.1-6.6 Pa) than filamentous species (yield = 7.2-14.6 %; IdoA = 4-7 mol%; Mw = 260-406 kDa; G' = 22.7-74.2 Pa). These results highlight the variability of the physicochemical properties of ulvan from different Ulva sources, and identifies a morphology-based division within the genus Ulva.
(Copyright © 2021 Elsevier Ltd. All rights reserved.)
Databáze: MEDLINE
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