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Physiological regulation of Cylindrospermopsis raciborskii (Nostocales, Cyanobacteria) in response to inorganic phosphorus limitation
Wu, Zhongxing1; Zeng, Bo1; Li, Renhui2; Song, Lirong2; Wu, ZX (reprint author), Southwest Univ, Sch Life Sci,Minist Educ, Chongqing Key Lab Plant Ecol & Resources Res Gorg, Key Lab Eco Environm Gorges Reservoir Reg 3, Chongqing 400715, Peoples R China.
2012-03-01
Source PublicationHARMFUL ALGAE
ISSN1568-9883
Volume15Pages:53-58
AbstractPhysiological responses to varying dissolved inorganic phosphorus (DIP) levels were examined to explore the acclimation mechanisms of Cylindrospermopsis raciborskii, a nontoxic diazotrophic cyanobacterium. The results showed that the growth rate of C. raciborskii was markedly reduced under phosphorus (P)-deficient conditions. Photosynthetic activity in terms of F-v/F-m (maximum quantum yield), ETRmax (maximum electron transport rate), alpha (photosynthetic efficiency) and I-k (saturation irradiance) was also found to be significantly lower after a 12-day incubation with a Pi concentration of less than 0.05 mg L-1. When supplied with phosphorus concentrations of more than 0.50 mg L-1, C raciborskii showed increased growth rates and reached a relatively stable value, about 0.26 d(-1). Additionally, the content of malodialdehyde (MDA), a lipid peroxidation product reflecting the destruction of lipid membrane by environmental stresses, in Cylindrospermopsis cultured with a low P concentration was 10.81-12.13 times higher than that with a high P concentration. The relative activities of catalase (CAT) and extracellular phosphatase (APA) were found to increase significantly to reduce the stress of P limitation and compensate for P deficiency. These data indicate that C. raciborskii is able to regulate its physiological metabolism in order to acclimate to low ambient DIP environments. Crown Copyright (C) 2011 Published by Elsevier B.V. All rights reserved.; Physiological responses to varying dissolved inorganic phosphorus (DIP) levels were examined to explore the acclimation mechanisms of Cylindrospermopsis raciborskii, a nontoxic diazotrophic cyanobacterium. The results showed that the growth rate of C. raciborskii was markedly reduced under phosphorus (P)-deficient conditions. Photosynthetic activity in terms of F-v/F-m (maximum quantum yield), ETRmax (maximum electron transport rate), alpha (photosynthetic efficiency) and I-k (saturation irradiance) was also found to be significantly lower after a 12-day incubation with a Pi concentration of less than 0.05 mg L-1. When supplied with phosphorus concentrations of more than 0.50 mg L-1, C raciborskii showed increased growth rates and reached a relatively stable value, about 0.26 d(-1). Additionally, the content of malodialdehyde (MDA), a lipid peroxidation product reflecting the destruction of lipid membrane by environmental stresses, in Cylindrospermopsis cultured with a low P concentration was 10.81-12.13 times higher than that with a high P concentration. The relative activities of catalase (CAT) and extracellular phosphatase (APA) were found to increase significantly to reduce the stress of P limitation and compensate for P deficiency. These data indicate that C. raciborskii is able to regulate its physiological metabolism in order to acclimate to low ambient DIP environments. Crown Copyright (C) 2011 Published by Elsevier B.V. All rights reserved.
SubtypeArticle
KeywordCylindrospermopsis Raciborskii Extracellular Phosphatase Inorganic Phosphorus (Pi) Physiological Regulation
Department[Wu, Zhongxing; Zeng, Bo] Southwest Univ, Sch Life Sci,Minist Educ, Chongqing Key Lab Plant Ecol & Resources Res Gorg, Key Lab Eco Environm Gorges Reservoir Reg 3, Chongqing 400715, Peoples R China; [Li, Renhui; Song, Lirong] Chinese Acad Sci, Inst Hydrobiol, State Key Lab Freshwater Ecol & Biotechnol, Wuhan 430072, Hubei, Peoples R China
DOI10.1016/j.hal.2011.11.005
WOS HeadingsScience & Technology ; Life Sciences & Biomedicine
Funding OrganizationNational Natural Science Foundation of China[30800123, 31170372]; State Key Basic Research and Development Plan of China[2008CB418000]; China SWU[SWU110065] ; National Natural Science Foundation of China[30800123, 31170372]; State Key Basic Research and Development Plan of China[2008CB418000]; China SWU[SWU110065] ; National Natural Science Foundation of China[30800123, 31170372]; State Key Basic Research and Development Plan of China[2008CB418000]; China SWU[SWU110065] ; National Natural Science Foundation of China[30800123, 31170372]; State Key Basic Research and Development Plan of China[2008CB418000]; China SWU[SWU110065]
Indexed BySCI
Language英语
WOS Research AreaMarine & Freshwater Biology
WOS SubjectMarine & Freshwater Biology
WOS IDWOS:000302042100007
WOS KeywordALKALINE-PHOSPHATASE ACTIVITY ; SUBTROPICAL WATER RESERVOIR ; BALTIC SEA ; PHYTOPLANKTON COMMUNITY ; PHOTOSYSTEM-II ; MICROCYSTIS ; TOLERANCE ; LAKE ; QUANTIFICATION ; ANTIOXIDANTS
Funding OrganizationNational Natural Science Foundation of China[30800123, 31170372]; State Key Basic Research and Development Plan of China[2008CB418000]; China SWU[SWU110065] ; National Natural Science Foundation of China[30800123, 31170372]; State Key Basic Research and Development Plan of China[2008CB418000]; China SWU[SWU110065] ; National Natural Science Foundation of China[30800123, 31170372]; State Key Basic Research and Development Plan of China[2008CB418000]; China SWU[SWU110065] ; National Natural Science Foundation of China[30800123, 31170372]; State Key Basic Research and Development Plan of China[2008CB418000]; China SWU[SWU110065]
Citation statistics
Cited Times:35[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.ihb.ac.cn/handle/342005/17053
Collection藻类生物学及应用研究中心_期刊论文
Corresponding AuthorWu, ZX (reprint author), Southwest Univ, Sch Life Sci,Minist Educ, Chongqing Key Lab Plant Ecol & Resources Res Gorg, Key Lab Eco Environm Gorges Reservoir Reg 3, Chongqing 400715, Peoples R China.
Affiliation1.Southwest Univ, Sch Life Sci,Minist Educ, Chongqing Key Lab Plant Ecol & Resources Res Gorg, Key Lab Eco Environm Gorges Reservoir Reg 3, Chongqing 400715, Peoples R China
2.Chinese Acad Sci, Inst Hydrobiol, State Key Lab Freshwater Ecol & Biotechnol, Wuhan 430072, Hubei, Peoples R China
Recommended Citation
GB/T 7714
Wu, Zhongxing,Zeng, Bo,Li, Renhui,et al. Physiological regulation of Cylindrospermopsis raciborskii (Nostocales, Cyanobacteria) in response to inorganic phosphorus limitation[J]. HARMFUL ALGAE,2012,15:53-58.
APA Wu, Zhongxing,Zeng, Bo,Li, Renhui,Song, Lirong,&Wu, ZX .(2012).Physiological regulation of Cylindrospermopsis raciborskii (Nostocales, Cyanobacteria) in response to inorganic phosphorus limitation.HARMFUL ALGAE,15,53-58.
MLA Wu, Zhongxing,et al."Physiological regulation of Cylindrospermopsis raciborskii (Nostocales, Cyanobacteria) in response to inorganic phosphorus limitation".HARMFUL ALGAE 15(2012):53-58.
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