Abstract
Flustra foliacea is a cheilostome marine bryozoan which, after initial horizontal growth during the first year, changes to erect growth thereafter. Appraising this slow-growing species for biotechnological use, required the development of cultivation methods for economical biomass production. Vegetative reproduction via cuttings, as employed in the horticulture of various plants, was tested. Fronds of F. foliacea were cut into pieces (10–150 mg fresh weight) and fixed in longitudinally cut silicon tubes. Bryozoa were fed with a mixture of Isochrysis galbana, Dunaliella tertiolecta and Cryptomonas sp. yielding growth rates of 0.3% ± 0.02 day−1of the initial fresh weight. Growth of the colony occurred firstly at the original growth margin, but later also at the transections, including the side fixed in the silicon tube, opposite to the growth margin. After three months of growth, the two layers of zooids split at the growth margin, forming two monolayers. This growth feature, not described previously for Flustra foliacea,was observed under experimental and natural conditions, and is interpreted as the beginning of one type of ramification. According to our findings, vegetative reproduction of F. foliacea under laboratory conditions is possible and might be an alternative to natural resources regarding biomass of this species.
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Carle, J. S. & C. Christophersen, 1980. Marine alkaloids. 2. Bromo alkaloids from the marine bryozoan Flustra foliacea. Isolation and structure elucidation. J. Org. Chem. 45: 1586–1589.
Carle, J. S. & C. Christophersen, 1981. Marine alkaloids. 3. Bromo-Substituted alkaloids from the marine bryozoan Flustra foliacea, flustramine C and flustraminol A and B. J. Org. Chem. 46: 3440- 3443.
Eggleston, D., 1972. Patterns of reproduction in marine Ectoprocta off the Isle of Man. J. Nat. Hist. 6: 31–38.
Hayward, P. J. & Ryland, J. S., 1998. Cheilostomatous Bryozoa. Part 1. Aeteoidea-Cribrilinoidea. Synop. Br. Fauna, New Ser. 10: 1–366.
Holst, P. B., U. Anthoni, C. Christophersen & P. H. Nielsen, 1994a. Marine alkaloids, 15. Two alkaloids, flustramine E and debromoflustramine B, from the marine bryozoan Flustra foliacea. J. Nat. Prod. 57: 997–1000.
Holst, P. B., U. Anthon, C. Christophersen, P. H. Nielsen & K. Bock, 1994b. A racemic diterpene from the marine bryozoan Flustra foliacea, natural product or artefact? Acta Chem. Scand. 48: 765–768.
Laycock, M. V., J. L. C. Wright, J. A. Findlay & A. D. Patil, 1986. New physostigmine related bromoalkaloids from the marine bryozoan Flustra foliacea. Can. J. Chem. 64: 1312–1316.
Menon, N. R., 1975. Observations on growth of Flustra foliacea (Bryozoa) from Helgoland waters. Helgoländer wiss. Meeresuntersuch. 27: 263–267.
Ryland, J. S., 1976. Physiology and ecology of marine bryozoans. Adv. mar. Biol. 14: 285–443.
Silén, L., 1981. Colony structure in Flustra foliacea (Linnaeus) (Bryozoa, Cheilostomata). Acta Zool. (Stockholm.) 62: 219- 232.
Sjöblom, T., L. Bohlin & C. Christophersen, 1983. Studies of Swedish marine organisms. II. Muscle-relaxant alkaloids from the marine bryozoan Flustra foliacea. Acta Pharm. Suec. 20: 415–419.
Stebbing, A. R. D., 1971. Growth of Flustra foliacea. Mar. Biol. 9: 267–273.
Tyler-Walters, H. & S. Ballerstedt, 2002. Flustra foliacea. Hornwrack. Marine Life Information Network: Biology and Sensitivity Key Information Sub-programme [on-line]. Plymouth: Marine Biological Association of the United Kingdom. [cited 02/07/02]. Available from: <http://www.marlin.ac.uk>.
Wulff, P., J. S. Carle & C. Christophersen, 1981. Marine alkaloids. Part 4. A formamide, flustrabromine, from the marine bryozoan Flustra foliacea. J. Chem. Soc. Perkin Trans. 1: 2895–2898.
Wulff, P., J. S. Carle & C. Christophersen, 1982a. Marine alkaloids 5. Flustramide A and 6-bromo-Nb-methyl-Nb-formyltryptamine from the marine bryozoanFlustra foliacea. Comp. Biochem. Physiol. 71B: 523–524.
Wulff, P., J. S. Carle & C. Christophersen, 1982b. Marine alkaloids 6. The first naturally occurring bromo-substituted quinoline from Flustra foliacea. Comp. Biochem. Physiol. 71B: 525–526.
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Kahle, J., Liebezeit, G. & Gerdes, G. Growth aspects of Flustra foliacea(Bryozoa, Cheilostomata) in laboratory culture. Hydrobiologia 503, 237–244 (2003). https://doi.org/10.1023/B:HYDR.0000008475.64207.15
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DOI: https://doi.org/10.1023/B:HYDR.0000008475.64207.15