Elevated CO 2 affects kelp nutrient quality: A case study of Saccharina japonica from CO 2 -enriched coastal mesocosm systems.

Autor: Zhang X; Yellow Sea Fisheries Research Institute, Chinese Academy of Fishery Sciences, Qingdao, 266071, China.; Function Laboratory for Marine Fisheries Science and Food Production Processes, Qingdao National Laboratory for Marine Science and Technology, Qingdao, 266200, China., Xu D; Yellow Sea Fisheries Research Institute, Chinese Academy of Fishery Sciences, Qingdao, 266071, China.; Function Laboratory for Marine Fisheries Science and Food Production Processes, Qingdao National Laboratory for Marine Science and Technology, Qingdao, 266200, China., Han W; Yellow Sea Fisheries Research Institute, Chinese Academy of Fishery Sciences, Qingdao, 266071, China., Wang Y; Yellow Sea Fisheries Research Institute, Chinese Academy of Fishery Sciences, Qingdao, 266071, China., Fan X; Yellow Sea Fisheries Research Institute, Chinese Academy of Fishery Sciences, Qingdao, 266071, China., Loladze I; Bryan College of Health Sciences, Bryan Medical Center, Lincoln, NE, 68506, USA., Gao G; State Key Laboratory of Marine Environmental Science, Xiamen University, Xiamen, 361005, China.; Jiangsu Key Laboratory for Marine Bioresources and Environment, Huaihai Institute of Technology, Lianyungang, 222005, China., Zhang Y; Yellow Sea Fisheries Research Institute, Chinese Academy of Fishery Sciences, Qingdao, 266071, China., Tong S; School of Life Science, Ludong University, Yantai, 264025, China., Ye N; Yellow Sea Fisheries Research Institute, Chinese Academy of Fishery Sciences, Qingdao, 266071, China.; Function Laboratory for Marine Fisheries Science and Food Production Processes, Qingdao National Laboratory for Marine Science and Technology, Qingdao, 266200, China.
Jazyk: angličtina
Zdroj: Journal of phycology [J Phycol] 2021 Feb; Vol. 57 (1), pp. 379-391. Date of Electronic Publication: 2020 Dec 14.
DOI: 10.1111/jpy.13097
Abstrakt: Kelps provide critical services for coastal food chains and ecosystem, and they are important food source for some segments of human population. Despite their ecological importance, little is known about long-term impacts of elevated CO 2 (eCO 2 ) on nutrient metabolites in kelps and the underlying regulation mechanisms. In this study, the kelp Saccharina japonica was cultured in CO 2 -enriched coastal mesocosm systems for up to 3 months. We found that, although eCO 2 significantly increased the growth rate, carbon concentrations, and C/N ratio of S. japonica, and it had no effect on total nitrogen and protein contents at the end of cultivation period. Meanwhile, it decreased the lipid, magnesium, sodium, and calcium content and changed the amino acid and fatty acid composition. Combining the genome-wide transcriptomic and metabolic evidence, we obtained a system-level understanding of metabolic response of S. japonica to eCO 2 . The unique ornithine-urea cycle (OUC) and aspartate-argininosuccinate shunt (AAS), coupled with TCA cycle, balanced the carbon and nitrogen metabolism under eCO 2 by providing carbon skeleton for amino acid synthesis and reduced power for nitrogen assimilation. This research provides a major advance in the understanding of kelp nutrient metabolic mechanism in the context of global climate change, and such CO 2 -induced shifts in nutritional value may induce changes in the structure and stability of marine trophic webs and affect the quality of human nutrition resources.
(© 2020 Phycological Society of America.)
Databáze: MEDLINE
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