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Effects of modified clay on the physiological and photosynthetic activities of Amphidinium carterae Hulburt
Liu, Shuya1,2,3; Yu, Zhiming1,2,3; Song, Xiuxian1,2,3; Cao, Xihua1,2
2017-12-01
Source PublicationHARMFUL ALGAE
ISSN1568-9883
Volume70Pages:64-72
Corresponding AuthorYu, Zhiming(zyu@qdio.ac.cn)
AbstractAmong the strategies for treating harmful algal blooms, flocculation using modified clay (MC) has been widely applied in the field. This paper studied the mitigation of MC on Amphidinium carterae Hulburt, finding that MC could not only effectively remove A. carterae, but also affect the physiological activities of the residual algae and inhibit their normal growth. The superoxide dismutase (SOD) activity, catalase (CAT) activity and malondialdehyde (MDA) content of the residual algae significantly increased compared with the control, indicating that MC stimulated the accumulation of reactive oxygen species (ROS) in algal cells. In addition, the cell density was significantly correlated with the SOD activity, CAT activity and MDA content in the experiment groups, suggesting that intracellular ROS might be the main internal factor inhibiting cell growth. To reveal the mechanism of ROSS generation, this paper further evaluated the effect of MC on photosynthesis in the residual microalgae, and found that compared with the control the absorption flux per photosystem II (PSII) reaction center (ABS/RC), the trapping flux per RC (TR0/RC) and the electron transport flux per RC (ET0/RC) increased, while the TR0/ABS and ET0/ABS decreased after adding 0.10 g/L and 0.25 g/L MC. These findings indicate that the MC led to an imbalance between photosynthetic light absorption and energy utilization and that the partial RCs became non primary quinone electron acceptor (Q(A))-RCs, further inducing the over-excitation of the active RCs. And MC caused the suppression of the electron transport chain (ETC): the ETC from the Q(A) to the secondary quinone electron acceptor (Q(B)) was blocked and the size of plastoquinone pool decreased, which could induce the over-reduction of PSII. The over-excitation of PSII and the damaged ETC likely induce the generation of ROS during photosynthesis. Thus, MC likely induced the accumulation of intracellular ROS due to photosynthesis inhibition, consequently hindering the growth of the residual algae. (C) 2017 Elsevier B.V. All rights reserved.
KeywordModified clay Amphidinium carterae Hulburt Antioxidant enzyme Photosynthesis Chlorophyll a fluorescence
DOI10.1016/j.hal.2017.10.007
Indexed BySCI
Language英语
Funding ProjectNational Key Research and Development Program of China[2017YFC1404306] ; AoShan Talents Cultivation Program[2017ASTCP-OS16] ; NSFC-Shandong Joint Fund for Marine Science Research Centers[U1606404] ; Chinese Academy of Sciences[XDA11020601]
WOS Research AreaMarine & Freshwater Biology
WOS SubjectMarine & Freshwater Biology
WOS IDWOS:000418311500005
PublisherELSEVIER SCIENCE BV
Citation statistics
Cited Times:6[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.qdio.ac.cn/handle/337002/157753
Collection海洋生态与环境科学重点实验室
Corresponding AuthorYu, Zhiming
Affiliation1.Chinese Acad Sci, Inst Oceanol, CAS Key Lab Marine Ecol & Environm Sci, Qingdao 266071, Peoples R China
2.Qingdao Natl Lab Marine Sci & Technol, Lab Marine Ecol & Environm Sci, Qingdao 266237, Peoples R China
3.Univ Chinese Acad Sci, Beijing 100049, Peoples R China
First Author AffilicationKey Laboratory of Marine Ecology & Environmental Sciences, CAS
Corresponding Author AffilicationKey Laboratory of Marine Ecology & Environmental Sciences, CAS
Recommended Citation
GB/T 7714
Liu, Shuya,Yu, Zhiming,Song, Xiuxian,et al. Effects of modified clay on the physiological and photosynthetic activities of Amphidinium carterae Hulburt[J]. HARMFUL ALGAE,2017,70:64-72.
APA Liu, Shuya,Yu, Zhiming,Song, Xiuxian,&Cao, Xihua.(2017).Effects of modified clay on the physiological and photosynthetic activities of Amphidinium carterae Hulburt.HARMFUL ALGAE,70,64-72.
MLA Liu, Shuya,et al."Effects of modified clay on the physiological and photosynthetic activities of Amphidinium carterae Hulburt".HARMFUL ALGAE 70(2017):64-72.
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