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Combined effects of ultraviolet radiation and temperature on morphology, photosynthesis, and DNA of Arthrospira (Spirulina) platensis (Cyanophyta)
Gao, Kunshan1,2,3; Li, Ping2; Watanabe, Teruo4; Helbling, E. Walter2,5,6; Gao, KS, Xiamen Univ, State Key Lab Marine Environm Sci, Xiamen 361005, Peoples R China
2008-06-01
Source PublicationJOURNAL OF PHYCOLOGY
ISSN0022-3646
Volume44Issue:3Pages:777-786
AbstractNatural levels of solar UVR were shown to break and alter the spiral structure of Arthrospira (Spirulina) platensis (Nordst.) Gomont during winter. However, this phenomenon was not observed during summer at temperatures of similar to 30 degrees C. Since little has been documented on the interactive effects of solar UV radiation (UVR; 280-400 nm) and temperature on cyanobacteria, the morphology, photosynthesis, and DNA damage of A. platensis were examined using two radiation treatments (PAR [400-700 nm] and PAB [PAR + UV-A + UV-B: 280-700]), three temperatures (15, 22, and 30 degrees C), and three biomass concentrations (100, 160, and 240 mg dwt [dry weight] . L-1). UVR caused a breakage of the spiral structure at 15 degrees C and 22 degrees C, but not at 30 degrees C. High PAR levels also induced a significant breakage at 15 degrees C and 22 degrees C, but only at low biomass densities, and to lesser extent when compared with the PAB treatment. A. platensis was able to alter its spiral structure by increasing helix tightness at the highest temperature tested. The photochemical efficiency was depressed to undetectable levels at 15 degrees C but was relatively high at 30 degrees C even under the treatment with UVR in 8 h. At 30 degrees C, UVR led to 93%-97% less DNA damage when compared with 15 degrees C after 8 h of exposure. UV-absorbing compounds were determined as negligible at all light and temperature combinations. The possible mechanisms for the temperature-dependent effects of UVR on this organism are discussed in this paper.; Natural levels of solar UVR were shown to break and alter the spiral structure of Arthrospira (Spirulina) platensis (Nordst.) Gomont during winter. However, this phenomenon was not observed during summer at temperatures of similar to 30 degrees C. Since little has been documented on the interactive effects of solar UV radiation (UVR; 280-400 nm) and temperature on cyanobacteria, the morphology, photosynthesis, and DNA damage of A. platensis were examined using two radiation treatments (PAR [400-700 nm] and PAB [PAR + UV-A + UV-B: 280-700]), three temperatures (15, 22, and 30 degrees C), and three biomass concentrations (100, 160, and 240 mg dwt [dry weight] . L-1). UVR caused a breakage of the spiral structure at 15 degrees C and 22 degrees C, but not at 30 degrees C. High PAR levels also induced a significant breakage at 15 degrees C and 22 degrees C, but only at low biomass densities, and to lesser extent when compared with the PAB treatment. A. platensis was able to alter its spiral structure by increasing helix tightness at the highest temperature tested. The photochemical efficiency was depressed to undetectable levels at 15 degrees C but was relatively high at 30 degrees C even under the treatment with UVR in 8 h. At 30 degrees C, UVR led to 93%-97% less DNA damage when compared with 15 degrees C after 8 h of exposure. UV-absorbing compounds were determined as negligible at all light and temperature combinations. The possible mechanisms for the temperature-dependent effects of UVR on this organism are discussed in this paper.
SubtypeArticle
KeywordArthrospira Platensis Cyanobacterium Dna Damage Morphology Photosynthesis Temperature Uvr
Department[Gao, Kunshan] Xiamen Univ, State Key Lab Marine Environm Sci, Xiamen 361005, Peoples R China; [Gao, Kunshan; Li, Ping; Helbling, E. Walter] Shantou Univ, Inst Marine Biol, Shantou 515063, Guangdong, Peoples R China; [Gao, Kunshan] Chinese Acad Sci, Inst Hydrol, State Key Lab Freshwater Ecol & Biotechnol, Wuhan 430072, Peoples R China; [Watanabe, Teruo] Hainan DIC Microalgae Co Ltd, Haikou Int Commercial Ctr 38, Haikou 570102, Hainan, Peoples R China; [Helbling, E. Walter] Consejo Nacl Invest Cient & Tecn, RA-9130 Rawson, Chubut, Argentina; [Helbling, E. Walter] Estac Fotobiol Playa Union, RA-9130 Rawson, Chubut, Argentina
Subject AreaPlant Sciences ; Marine & Freshwater Biology
DOI10.1111/j.1529-8817.2008.00512.x
WOS HeadingsScience & Technology ; Life Sciences & Biomedicine
Indexed BySCI
Language英语
WOS Research AreaPlant Sciences ; Marine & Freshwater Biology
WOS SubjectPlant Sciences ; Marine & Freshwater Biology
WOS IDWOS:000256123700024
WOS KeywordSOLAR UV-RADIATION ; CHLOROPHYLL FLUORESCENCE ; CYANOBACTERIUM ARTHROSPIRA ; MARINE-PHYTOPLANKTON ; OUTDOOR CULTURES ; GROWN OUTDOORS ; PHOTOSYSTEM-II ; B RADIATION ; DAMAGE ; PHOTOINHIBITION
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Document Type期刊论文
Identifierhttp://ir.ihb.ac.cn/handle/152342/8116
Collection期刊论文
Corresponding AuthorGao, KS, Xiamen Univ, State Key Lab Marine Environm Sci, Xiamen 361005, Peoples R China
Affiliation1.Xiamen Univ, State Key Lab Marine Environm Sci, Xiamen 361005, Peoples R China
2.Shantou Univ, Inst Marine Biol, Shantou 515063, Guangdong, Peoples R China
3.Chinese Acad Sci, Inst Hydrol, State Key Lab Freshwater Ecol & Biotechnol, Wuhan 430072, Peoples R China
4.Hainan DIC Microalgae Co Ltd, Haikou Int Commercial Ctr 38, Haikou 570102, Hainan, Peoples R China
5.Consejo Nacl Invest Cient & Tecn, RA-9130 Rawson, Chubut, Argentina
6.Estac Fotobiol Playa Union, RA-9130 Rawson, Chubut, Argentina
Recommended Citation
GB/T 7714
Gao, Kunshan,Li, Ping,Watanabe, Teruo,et al. Combined effects of ultraviolet radiation and temperature on morphology, photosynthesis, and DNA of Arthrospira (Spirulina) platensis (Cyanophyta)[J]. JOURNAL OF PHYCOLOGY,2008,44(3):777-786.
APA Gao, Kunshan,Li, Ping,Watanabe, Teruo,Helbling, E. Walter,&Gao, KS, Xiamen Univ, State Key Lab Marine Environm Sci, Xiamen 361005, Peoples R China.(2008).Combined effects of ultraviolet radiation and temperature on morphology, photosynthesis, and DNA of Arthrospira (Spirulina) platensis (Cyanophyta).JOURNAL OF PHYCOLOGY,44(3),777-786.
MLA Gao, Kunshan,et al."Combined effects of ultraviolet radiation and temperature on morphology, photosynthesis, and DNA of Arthrospira (Spirulina) platensis (Cyanophyta)".JOURNAL OF PHYCOLOGY 44.3(2008):777-786.
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