Metabolisms and multiple functions of laminaran in marine algae under global change: A critical review.

Jichen Chen, Azhar Rashid, Shuqi Wang, Xiaojuan Liu, Guang Gao

Journal: Carbohydrate polymers 2024;327():121652

PMID: 38171655

Full Text on Elsevier Science View on PubMed

Abstract

Laminaran is a major storage of carbohydrate in marine algae. Its high content and potential functions draw increasing attention. However, our understanding of its metabolisms and functions is still fragmented. After reviewing, marine algae exhibit a spectacular capacity of laminaran accumulation especially in the diatom Odontella aurita (65 % DW). Marine particulate organic carbon (POC) also has high contents of laminaran (42 ± 21 % DW). Laminaran shows a diel variation trend in marine algae, the content of which increases in the day but decreases at night. Laminaran also significantly accumulates in the stationary phase of algal growth. Furthermore, the metabolic pathway of laminaran and the remolding carbon mechanism in response to marine nitrogen limitation are proposed and comprehensively discussed. Laminaran production in marine phytoplankton is predicted to increase in future warmer and CO-enriched oceans. Laminaran has diverse biological functions, including antioxidant, antimicrobial, anti-cancer, immunomodulatory, wound healing, and prebiotics. In addition, laminaran is also a major carbon storage compound in marine algae, suggesting its significant ecological function in marine carbon cycle. This study provides new insight into algal laminaran functions and its response mechanisms to environmental and climate changes.

Address: State Key Laboratory of Marine Environmental Science and College of Ocean and Earth Sciences, Xiamen University, Xiamen 361005, China; Guangdong Provincial Key Laboratory of Marine Biotechnology and Guangdong Provincial Key Laboratory of Marine Disaster Prediction and Prevention, College of Sciences, Shantou University, Shantou 515063, China.; Department of Environmental Sciences, The University of Haripur, Haripur 22620, Pakistan.; Guangdong Provincial Key Laboratory of Marine Biotechnology and Guangdong Provincial Key Laboratory of Marine Disaster Prediction and Prevention, College of Sciences, Shantou University, Shantou 515063, China.; Guangdong Provincial Key Laboratory of Marine Biotechnology and Guangdong Provincial Key Laboratory of Marine Disaster Prediction and Prevention, College of Sciences, Shantou University, Shantou 515063, China. Electronic address: [email protected].; State Key Laboratory of Marine Environmental Science and College of Ocean and Earth Sciences, Xiamen University, Xiamen 361005, China. Electronic address: [email protected].

DOI: 10.1016/j.carbpol.2023.121652

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MeSH Terms: Glucans, Phytoplankton, Diatoms, Organic Chemicals, Carbon