Comparison of the photo-acclimation potential of floating and benthic thalli of Sargassum horneri(Phaeophyta) during autumn and winter
文献类型：CNKI期刊论文
| 作者 | Jingjing LI ; Yunlong PANG; Song QIN; Zhengyi LIU; Zhihai ZHONG; Wanlin SONG; Longchuan ZHUANG
|
| 发表日期 | 2022-01-15 |
| 出处 | Journal of Oceanology and Limnology
 |
| 关键词 | chlorophyll-a fluorescence growth photosynthesis photosynthetic pigments Sargassum horneri |
| 英文摘要 | Sargassum horneri is a foundational species and an important contributor to the fl oating seaweed stock along the northeastern coast of Asia. In this study, benthic and fl oating thalli of S. horneri were collected from Changdao Island(37°54′N, 120°43′E), Bohai Bay, China. We conducted an in-situ and an indoor experiment to study the acclimation potential in S. horneri to abiotic conditions at sea surface in autumn and winter. Both benthic and fl oating thalli were cultured in situ for two months(from October to December) at dif ferent depths: 0 m above sea level(masl) and 3 m below sea level(mbsl), and their growth rate, biochemical content, and photosynthetic performance were compared. During the first month of culture, the relative growth rate of fl oating thalli was 2-fold greater than that of benthic thalli at 0 masl. The photosynthetic rate of most thalli was significantly higher at 0 masl than at 3 mbsl. In the indoor experiments,fl oating and benthic thalli were exposed to high light intensity(400 μmol photons/(m 2 ·s) photosynthetically active radiation(PAR)) for 21 d, and their photo-acclimation capacities were compared. Under high light intensity, the two types of thalli showed low maximum quantum yield( F_v/F_m) and light utilisation e fficiency( α) but high light saturation point( E_k). Floating thalli showed higher photosynthetic rate and photoprotective ability than benthic thalli at high light intensity. The ef fective quantum yield of photosystem Ⅱ [Y(Ⅱ)] of both types of thalli recovered after a 6-day treatment with low light intensity(40 μmol photons/(m~2 ·s)).These findings suggest that S. horneri is highly acclimated to the sea surface environment, which possibly contributes to its rapid accumulation and long free-fl oating periods at the sea surface. |
| 文献子类 | CNKI期刊论文 |
| 资助机构 | Supported by the National Key Research and Development Program of China (No. 2016YFC1402106) ; the National Natural Science Foundation of China (Nos. 31700327, 42006110) ; the Natural Science Foundation of Shandong Province (No. ZR2019QD017) ; the Fundamental Research Funds for the Central Universities (No. B200202140) ; the Key R&D Projects in Shandong Province (International Scientific and Technical Cooperation)(No. 2019GHZ026) |
| 卷 | v.40期:01页:198-208 |
| 语种 | 英文; |
| 分类号 | Q948 |
| ISSN号 | 2096-5508 |
| 源URL | [http://ir.qdio.ac.cn/handle/337002/187536]  |
| 专题 | 中国科学院海洋研究所 |
| 作者单位 | 1.WeihaiVocationalCollege 2.YantaiInstituteofCoastalZoneResearch,ChineseAcademyofSciences 3.CenterforOceanMega-Science,ChineseAcademyofSciences 4.KeyLaboratoryofMarineHazardsForecasting,MinistryofNaturalResources,HohaiUniversity |
| 推荐引用方式 GB/T 7714 | Jingjing LI,Yunlong PANG,Song QIN,et al. Comparison of the photo-acclimation potential of floating and benthic thalli of Sargassum horneri(Phaeophyta) during autumn and winter. 2022. |
入库方式： OAI收割
来源：海洋研究所
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