Hyposalinity disrupts photosynthesis and induces oxidative stress leading to "ice-ice" disease development in Eucheuma denticulatum
文献类型：期刊论文
| 作者 | Li, Hu1,3; Huang, Yuan2; Pang, Tong1,3; Zhang, Litao1,3; Liu, Jianguo1,3 |
| 刊名 | ALGAL RESEARCH-BIOMASS BIOFUELS AND BIOPRODUCTS
 |
| 出版日期 | 2026 |
| 卷号 | 93页码:13 |
| 关键词 | Eucheuma denticulatum Hyposalinity Seaweed aquaculture "Ice-ice" disease Photosystem II Antioxidant response |
| ISSN号 | 2211-9264 |
| DOI | 10.1016/j.algal.2025.104474 |
| 通讯作者 | Liu, Jianguo(jgliu@qdio.ac.cn) |
| 英文摘要 | Salinity fluctuations in tropical coastal waters, often intensified by heavy rainfall or freshwater inflow, threaten the health and productivity of farmed macroalgae. Eucheuma denticulatum, a major carrageenophyte crop, is highly susceptible to "ice-ice" disease, but its physiological triggers are poorly understood. Here, we integrated physiological, biochemical, and transcriptomic analyses to evaluate E. denticulatum responses to a salinity gradient (18-34 psu). Moderate hyposalinity (22-28 psu) caused minimal effects, whereas extreme hyposalinity (18 psu) for 12-60 h rapidly reduced photosystem II (PSII) performance, lowering maximum quantum yield (FV/ FM), actual photochemical efficiency (Phi PSII), and maximum relative electron transport rate (rETRmax), and induced visible thallus whitening. Transcriptomic profiling revealed 1828 differentially expressed genes enriched in photosynthesis, oxidative stress, and osmotic regulation pathways, with PSII-related genes downregulated and antioxidant defense genes upregulated. Biochemical assays confirmed elevated hydrogen peroxide and malondialdehyde levels alongside enhanced antioxidant enzyme activities. These findings demonstrate that extreme hyposalinity disrupts PSII function and redox homeostasis, initiating a stress cascade leading to "ice-ice" disease. PSII dysfunction emerges as an early marker of hyposalinity stress, offering a practical basis for monitoring and managing environmental risk in tropical seaweed aquaculture under climate change. |
| WOS关键词 | RED ALGA ; SALINITY ; PHOTOINHIBITION ; TEMPERATURE ; ENRICHMENT ; DUNALIELLA ; TOLERANCE ; THALLI ; GROWTH ; YIELD |
| 资助项目 | Guangdong Provincial Project on Innovative Technologies for the Modern Marine Ranching Industry[2024-MRI-001-04] ; Guangdong Provincial Project on Innovative Technologies for the Modern Marine Ranching Industry[2024-MRI-001-08] ; National Natural Science Foundation of China[32171541] ; National Natural Science Foundation of China[32371623] ; National Natural Science Foundation of China[32201322] ; Shandong Province Natural Science Foundation[ZR2020QD101] |
| WOS研究方向 | Biotechnology & Applied Microbiology |
| 语种 | 英语 |
| WOS记录号 | WOS:001641538600001 |
| 出版者 | ELSEVIER |
| 源URL | [http://ir.qdio.ac.cn/handle/337002/204508]  |
| 专题 | 海洋研究所_实验海洋生物学重点实验室 |
| 通讯作者 | Liu, Jianguo |
| 作者单位 | 1.Chinese Acad Sci, Inst Oceanol, Key Lab Breeding Biotechnol & Sustainable Aquacult, 88 Haijun Rd, Qingdao 266404, Peoples R China 2.Nanjing Normal Univ, Sch Biol Sci, Jiangsu Key Lab Biodivers & Biotechnol, 1 Wenyuan Rd, Nanjing 210023, Peoples R China 3.Qingdao Marine Sci & Technol Ctr, Lab Marine Biol & Biotechnol, 168 Wenhai Rd, Qingdao 266237, Peoples R China |
| 推荐引用方式 GB/T 7714 | Li, Hu,Huang, Yuan,Pang, Tong,et al. Hyposalinity disrupts photosynthesis and induces oxidative stress leading to "ice-ice" disease development in Eucheuma denticulatum[J]. ALGAL RESEARCH-BIOMASS BIOFUELS AND BIOPRODUCTS,2026,93:13. |
| APA | Li, Hu,Huang, Yuan,Pang, Tong,Zhang, Litao,&Liu, Jianguo.(2026).Hyposalinity disrupts photosynthesis and induces oxidative stress leading to "ice-ice" disease development in Eucheuma denticulatum.ALGAL RESEARCH-BIOMASS BIOFUELS AND BIOPRODUCTS,93,13. |
| MLA | Li, Hu,et al."Hyposalinity disrupts photosynthesis and induces oxidative stress leading to "ice-ice" disease development in Eucheuma denticulatum".ALGAL RESEARCH-BIOMASS BIOFUELS AND BIOPRODUCTS 93(2026):13. |
入库方式： OAI收割
来源：海洋研究所
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