Effects of the heavy metal cadmium on photosynthetic activity and the xanthophyll cycle in Phaeodactylum tricornutum
文献类型：CNKI期刊论文
| 作者 | Ji Y(季琰); Jie XJ(解修俊); Wang GC(王广策) |
| 发表日期 | 2018-11-15 |
| 出处 | Journal of Oceanology and Limnology
 |
| 关键词 | heavy metal cadmium photosystem Ⅰ photosystem Ⅱ P haeodactylum tricornutum |
| 英文摘要 | A bstract Cadmium(Cd) is one of the most common and widespread heavy metals in the environment. Cd has adverse effects on photosynthesis that are countered by photosystem I(PSI) and photosystem II(PSII); however, the protective responses of these photosystems to heavy metal stress remain unclear. Using the model diatom P haeodactylum tricornutum, a biological indicator that is widely used to assess the impact of environmental toxins, we simultaneously measured the effects of Cd on PSI and PSII and examined the levels of pigments in response to high light treatments before and after Cd exposure. Cd significantly reduced the quantum yield and electron transport rates of PSI and PSII. The quantum yield of non-photochemical energy dissipation in PSI due to donor side limitation increased faster than the quantum yield due to acceptor side limitation. The Cd treatment activated the P. tricornutum xanthophyll cycle under artificial light conditions, as indicated by an increased diatoxanthin content. Xanthophyll is important for photoprotection; therefore, the accumulation of diatoxanthin may down-regulate PSII activities to reduce oxidative damage. Together, our results suggest that the rapid reduction in PSII activities following Cd exposure is an adaptive response to heavy metal stress that reflects the variable exposure to external stressors in the native P. tricornutum environment. |
| 文献子类 | CNKI期刊论文 |
| 资助机构 | Supported by the National Natural Science Foundation of China(No.41506172) ; the International S&T Cooperation Program of China(No.2015DFG32160) |
| 卷 | v.36期:06页:296-303 |
| 语种 | 英文; |
| 分类号 | X173 |
| ISSN号 | 2096-5508 |
| 源URL | [http://ir.qdio.ac.cn/handle/337002/188730]  |
| 专题 | 中国科学院海洋研究所 |
| 作者单位 | 1.SchoolofBiologicalandChemicalEngineering,QingdaoTechnicalCollege 2.KeyLaboratoryofExperimentalMarineBiology,InstituteofOceanology,ChineseAcademyofSciences 3.LaboratoryforMarineBiologyandBiotechnology,QingdaoNationalLaboratoryforMarineScienceandTechnology |
| 推荐引用方式 GB/T 7714 | Ji Y,Jie XJ,Wang GC. Effects of the heavy metal cadmium on photosynthetic activity and the xanthophyll cycle in Phaeodactylum tricornutum. 2018. |
入库方式： OAI收割
来源：海洋研究所
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