Journal
MARINE BIOTECHNOLOGY
Volume 20, Issue 4, Pages 520-530Publisher
SPRINGER
DOI: 10.1007/s10126-018-9823-7
Keywords
Agar; Polysaccharide; Red seaweed; Pyropia yezoensis; Discoloration; Industrial waste
Funding
- Grants-in-Aid for Scientific Research [15H04539] Funding Source: KAKEN
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The red seaweed Pyropia yezoensis has been demonstrated to be a novel resource for the production of high-quality agar. P. yezoensis is grown for the food industry in large-scale Japanese mariculture operations. However, discolored P. yezoensis is mostly discarded as an industrial waste, although it has some kind of utility values. Here, we evaluated the utility of discolored P. yezoensis as a resource for agar production. The quality of agar from the discolored seaweed was comparable to that from normal seaweed. In addition, as a distinguishing characteristic, agar yield was higher from discolored seaweeds than from normal types. Moreover, we successfully used agar from discolored P. yezoensis for bacterial plate media and DNA electrophoresis gels without agarose purification. Thus, our results demonstrate that discolored P. yezoensis is suitable for agar production and use in life science research. Diverting discolored P. yezoensis from disposal to agar production provides a solution to the current industrial waste problem in mariculture, as well as a secure source of agar for research purposes.
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