Elevated CO2 affects kelp nutrient quality : A case study of Saccharina japonica from CO2 -enriched coastal mesocosm systems

© 2020 Phycological Society of America..

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 CO2 (eCO2 ) on nutrient metabolites in kelps and the underlying regulation mechanisms. In this study, the kelp Saccharina japonica was cultured in CO2 -enriched coastal mesocosm systems for up to 3 months. We found that, although eCO2 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 eCO2 . The unique ornithine-urea cycle (OUC) and aspartate-argininosuccinate shunt (AAS), coupled with TCA cycle, balanced the carbon and nitrogen metabolism under eCO2 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 CO2 -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.

Medienart:

E-Artikel

Erscheinungsjahr:

2021

Erschienen:

2021

Enthalten in:

Zur Gesamtaufnahme - volume:57

Enthalten in:

Journal of phycology - 57(2021), 1 vom: 01. Feb., Seite 379-391

Sprache:

Englisch

Beteiligte Personen:

Zhang, Xiaowen [VerfasserIn]
Xu, Dong [VerfasserIn]
Han, Wentao [VerfasserIn]
Wang, Yitao [VerfasserIn]
Fan, Xiao [VerfasserIn]
Loladze, Irakli [VerfasserIn]
Gao, Guang [VerfasserIn]
Zhang, Yan [VerfasserIn]
Tong, Shanying [VerfasserIn]
Ye, Naihao [VerfasserIn]

Links:

Volltext

Themen:

142M471B3J
Carbon Dioxide
Elevated CO2
Journal Article
Kelp
Marine ecosystem
Metabolite
N762921K75
Nitrogen
Nutrition
Research Support, Non-U.S. Gov't

Anmerkungen:

Date Completed 20.04.2021

Date Revised 09.01.2024

published: Print-Electronic

RefSeq: PRJNA423137, SRP127301

Citation Status MEDLINE

doi:

10.1111/jpy.13097

funding:

Förderinstitution / Projekttitel:

PPN (Katalog-ID):

NLM317187694