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Effects of the heavy metal cadmium on photosynthetic activity and the xanthophyll cycle in Phaeodactylum tricornutum
Ji Yan1; Xie Xiujun2,3; Wang Guangce2,3
2018-11-01
Source PublicationJOURNAL OF OCEANOLOGY AND LIMNOLOGY
ISSN2096-5508
Volume36Issue:6Pages:2194-2201
Corresponding AuthorWang Guangce(gcwang@qdio.ac.cn)
AbstractCadmium (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 Phaeodactylum 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.
Keywordheavy metal cadmiwn photosystem I photosystem II Phaeodactylum tricornutum
DOI10.1007/s00343-019-7160-y
Indexed BySCI
Language英语
Funding ProjectNational Natural Science Foundation of China[41506172] ; International S&T Cooperation Program of China[2015DFG32160]
WOS Research AreaMarine & Freshwater Biology ; Oceanography
WOS SubjectLimnology ; Oceanography
WOS IDWOS:000454629000023
PublisherSCIENCE PRESS
Citation statistics
Document Type期刊论文
Identifierhttp://ir.qdio.ac.cn/handle/337002/155923
Collection实验海洋生物学重点实验室
Corresponding AuthorWang Guangce
Affiliation1.Qingdao Tech Coll, Sch Biol & Chem Engn, Qingdao 266555, Peoples R China
2.Chinese Acad Sci, Inst Oceanol, Key Lab Expt Marine Biol, Qingdao 266071, Peoples R China
3.Qingdao Natl Lab Marine Sci & Technol, Lab Marine Biol & Biotechnol, Qingdao 266071, Peoples R China
Corresponding Author AffilicationKey Laboratory of Experimental Marine Biology, Institute of Oceanology, Chinese Academy of Sciences
Recommended Citation
GB/T 7714
Ji Yan,Xie Xiujun,Wang Guangce. Effects of the heavy metal cadmium on photosynthetic activity and the xanthophyll cycle in Phaeodactylum tricornutum[J]. JOURNAL OF OCEANOLOGY AND LIMNOLOGY,2018,36(6):2194-2201.
APA Ji Yan,Xie Xiujun,&Wang Guangce.(2018).Effects of the heavy metal cadmium on photosynthetic activity and the xanthophyll cycle in Phaeodactylum tricornutum.JOURNAL OF OCEANOLOGY AND LIMNOLOGY,36(6),2194-2201.
MLA Ji Yan,et al."Effects of the heavy metal cadmium on photosynthetic activity and the xanthophyll cycle in Phaeodactylum tricornutum".JOURNAL OF OCEANOLOGY AND LIMNOLOGY 36.6(2018):2194-2201.
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