Ascidian bioresources: common and variant chemical compositions and exploitation strategy examples of Halocynthia roretzi, Styela plicata, Ascidia sp and Ciona intestinalis
2016 (English)In: Zeitschrift für Naturforschung C - A Journal of Biosciences, ISSN 0939-5075, E-ISSN 1865-7125, Vol. 71, no 5-6, 165-180 p.Article in journal (Refereed) PublishedText
To explore abundant marine ascidian bioresources, four species from two orders have been compared in their chemical compositions. After a universal separation of the animal body into two fractions, all tunics have been found rich in carbohydrate contents, while all inner body tissues are richer in proteins. Cellulose is present almost exclusively in the tunics and more in the order Stolidobranchia, while more sulfated polysaccharides are present in Phlebobranchia species. Almost all proteins are collagens with a high essential amino acid index and high delicious amino acid (DAA) content. All fractions also have high contents of good-quality fatty acids and trace minerals but low toxic element contents, with different sterols and glycosaminoglycans. There are species-specific characteristics observed for vanadium accumulation and sterol structures which are also meaningful for ascidian chemotaxonomy and resource exploitation. It is suggested that in addition to the present utilizations of tunics for cellulose production and of some species' inner body tissues as human food, one should explore all species' inner body tissues as human foods and all tunics as food or animal feed with the contained cellulose as dietary fiber. Collagens, sulfated polysaccharides, glycosaminoglycans, sterols and trace elements could be explored as byproducts for, e.g. pharmaceutical and chemical industries.
Place, publisher, year, edition, pages
2016. Vol. 71, no 5-6, 165-180 p.
ascidian, compositions, exploitation, Phlebobranchia, Stolidobranchia
IdentifiersURN: urn:nbn:se:kth:diva-189824DOI: 10.1515/znc-2016-0012ISI: 000378332200010PubMedID: 27049617ScopusID: 2-s2.0-84974795063OAI: oai:DiVA.org:kth-189824DiVA: diva2:949384
QC 201607192016-07-192016-07-152016-07-19Bibliographically approved