Institute for Polymers and Composites/I3N, University of Minho, Campus de Azurém, 4800-058 Guimarães, Portugal.
CIIMAR/CIMAR, and Department of Biology, Faculty of Sciences University of Porto, Rua dos Bragas, 289, 4150-123 Porto, Portugal.
Carbohydr Polym. 2015 Feb 13;116:140-8. doi: 10.1016/j.carbpol.2014.04.069. Epub 2014 Apr 26.
The biomass yield potential of Mastocarpus stellatus, a commercially attractive carrageenophyte for foods and pharmaceutics, was investigated by cultivating the seaweeds in the nutrient-rich outflow of a commercial fish farm. Results from two consecutive 4 weeks experiments indicate that the cultivation of this seaweed produces a mean biomass of 21 to 40.6 gDW m(-2) day(-1) depending on the time of the experiment. DRIFT and CP-MAS NMR analyses of seaweeds indicate that cultivation during May affected quantitatively the seaweeds chemistry, and thus the chemical and gelling properties of native extracts of kappa/iota-hybrid carrageenan (KI). Overall, algal growth leads to the production of more sulphated KI, the percentage increase varying between 27% and 44% for the two experiments. However, alkali treatment of seaweeds before extraction reduces the variations in gelling properties of KI induced by the algal growth. This study demonstrates the capacity of growing M. stellatus in an integrated multi-trophic aquaculture system for the sustainable production of high value polysaccharides.
对 Mastocarpus stellatus（一种具有商业吸引力的卡拉胶海藻，可用于食品和制药）的生物量产量潜力进行了研究，方法是在商业养鱼场的富营养流出物中养殖海藻。两项连续 4 周的实验结果表明，根据实验时间的不同，这种海藻的平均生物量为 21 至 40.6 gDW m(-2) day(-1)。DRIFT 和 CP-MAS NMR 分析表明，5 月的养殖在数量上影响了海藻的化学性质，从而影响了天然κ/ι-杂合卡拉胶（KI）提取物的化学和胶凝性质。总的来说，藻类生长导致更多硫酸化 KI 的产生，两个实验的百分比增加在 27%至 44%之间。然而，在提取前对海藻进行碱处理可以减少藻类生长引起的 KI 胶凝性质变化。本研究证明了在集成多营养水产养殖系统中生长 M. stellatus 以可持续生产高价值多糖的能力。
