Pyropia (Porphyra, referred to as ‘Gim’ in Korea or ‘Nori’ in Japan), an economically valuable alga, has long been consumed as seafood, especially in north‐east Asian countries. Its well‐established conventional mass cultivation and harvesting methods in coastal areas widen the industrial availability of edible Pyropia sp. However, the unexpected discoloration derived from causative factors during the cultivation process gives rise to serious economic losses in the aquaculture industry. For the industrial use of discoloured laver waste (DLW), recent articles have suggested that DLW biomass could be used as a source of agar polysaccharide, porphyran, γ‐aminobutyric acid and other value‐added bioactive compound productions. Although DLW biomass has economic potential, the lack of integrated information and relevant studies still limits its industrial availability. Therefore, we discussed recent research concerning the functional ingredients, causative factors and potential availability of DLW to provide integrated information. Furthermore, this review suggested the potential industrial application of DLW as a source for other value‐added material production.

中文翻译：

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海洋红藻远视中的变色：成因和利用废物资源的生物技术潜力

具经济价值的藻类-比罗非鱼（紫菜，在韩国被称为“ Gim”，在日本被称为“ Nori”），长期以来被作为海鲜消费，特别是在东北亚国家。它在沿海地区成熟的常规大规模栽培和收获方法扩大了可食用的近视眼的工业实用性sp。然而，在养殖过程中，由原因引起的意外变色在水产养殖业中造成了严重的经济损失。对于变色紫菜废料（DLW）的工业用途，最近的文章建议将DLW生物质用作琼脂多糖，卟啉，γ-氨基丁酸和其他增值生物活性化合物产品的来源。尽管DLW生物质具有经济潜力，但缺乏综合信息和相关研究仍然限制了其工业实用性。因此，我们讨论了有关DLW的功能成分，致病因素和潜在可用性的最新研究，以提供综合信息。此外，这篇评论还提出了DLW在其他增值材料生产中的潜在工业应用。