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Are all ulvans equal? A comparative assessment of the chemical and gelling properties of ulvan from blade and filamentous Ulva
- Source :
- Carbohydrate polymers. 264
- Publication Year :
- 2021
-
Abstract
- 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.
- Subjects :
- Polymers and Plastics
Iduronic Acid
Iduronic acid
02 engineering and technology
010402 general chemistry
Polysaccharide
01 natural sciences
chemistry.chemical_compound
Ulva
Algae
Cell Wall
Polysaccharides
Botany
Spectroscopy, Fourier Transform Infrared
Materials Chemistry
chemistry.chemical_classification
biology
Sulfates
Organic Chemistry
021001 nanoscience & nanotechnology
biology.organism_classification
Seaweed
0104 chemical sciences
Molecular Weight
chemistry
Multivariate Analysis
Composition (visual arts)
0210 nano-technology
Rheology
New Zealand
Subjects
Details
- ISSN :
- 18791344
- Volume :
- 264
- Database :
- OpenAIRE
- Journal :
- Carbohydrate polymers
- Accession number :
- edsair.doi.dedup.....b22e6b21c23223de33b1a511e91402e4