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学科主题: Plant Sciences; Marine & Freshwater Biology
题名: Combined effects of ultraviolet radiation and temperature on morphology, photosynthesis, and DNA of Arthrospira (Spirulina) platensis (Cyanophyta)
作者: Gao, Kunshan1, 2, 3; Li, Ping2; Watanabe, Teruo4; Helbling, E. Walter2, 5, 6
通讯作者: Gao, KS, Xiamen Univ, State Key Lab Marine Environm Sci, Xiamen 361005, Peoples R China
关键词: Arthrospira platensis ; cyanobacterium ; DNA damage ; morphology ; photosynthesis ; temperature ; UVR
刊名: JOURNAL OF PHYCOLOGY
发表日期: 2008-06-01
DOI: 10.1111/j.1529-8817.2008.00512.x
卷: 44, 期:3, 页:777-786
收录类别: SCI
文章类型: Article
部门归属: [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
WOS标题词: Science & Technology ; Life Sciences & Biomedicine
类目[WOS]: Plant Sciences ; Marine & Freshwater Biology
研究领域[WOS]: Plant Sciences ; Marine & Freshwater Biology
摘要: 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.
英文摘要: 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.
关键词[WOS]: SOLAR UV-RADIATION ; CHLOROPHYLL FLUORESCENCE ; CYANOBACTERIUM ARTHROSPIRA ; MARINE-PHYTOPLANKTON ; OUTDOOR CULTURES ; GROWN OUTDOORS ; PHOTOSYSTEM-II ; B RADIATION ; DAMAGE ; PHOTOINHIBITION
语种: 英语
WOS记录号: WOS:000256123700024
ISSN号: 0022-3646
Citation statistics:
内容类型: 期刊论文
URI标识: http://ir.ihb.ac.cn/handle/152342/8116
Appears in Collections:中科院水生所知识产出(2009年前)_期刊论文

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作者单位: 1.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:
Gao, Kunshan; Li, Ping; Watanabe, Teruo; Helbling, E. Walter.Combined effects of ultraviolet radiation and temperature on morphology, photosynthesis, and DNA of Arthrospira (Spirulina) platensis (Cyanophyta),JOURNAL OF PHYCOLOGY,2008,44(3):777-786
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