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Effects of solar UV radiation on morphology and photosynthesis of filamentous cyanobacterium Arthrospira platensis
文献类型：期刊论文
| 作者 | Wu, HY; Gao, KS; Villafane, VE; Watanabe, T; Helbling, EW |
| 刊名 | APPLIED AND ENVIRONMENTAL MICROBIOLOGY
 |
| 出版日期 | 2005-09-01 |
| 卷号 | 71期号:9页码:5004-5013 |
| 关键词 | ULTRAVIOLET-B RADIATION INDUCED DNA-DAMAGE BLUE-GREEN-ALGA SPIRULINA-PLATENSIS NITROGEN-METABOLISM OZONE DEPLETION LIGHT IRRADIATION REPAIR PHOTOINHIBITION |
| ISSN号 | 0099-2240 |
| 通讯作者 | Gao, KS, Shantou Univ, Inst Marine Biol, Shantou 515063, Guangdong, Peoples R China |
| 中文摘要 | To study the impact of solar UV radiation (UVR) (280 to 400 nm) on the filamentous cyanobacterium Arthrospira (Spirulina) platensis, we examined the morphological changes and photosynthetic performance using an indoor-grown strain (which had not been exposed to sunlight for decades) and an outdoor-grown strain (which had been grown under sunlight for decades) while they were cultured with three solar radiation treatments: PAB (photosynthetically active radiation [PAR] plus UVR; 280 to 700 nm), PA (PAR plus UV-A; 320 to 700 nm), and P (PAR only; 400 to 700 nm). Solar UVR broke the spiral filaments of A. platensis exposed to full solar radiation in short-term low-cell-density cultures. This breakage was observed after 2 h for the indoor strain but after 4 to 6 h for the outdoor strain. Filament breakage also occurred in the cultures exposed to PAR alone; however, the extent of breakage was less than that observed for filaments exposed to full solar radiation. The spiral filaments broke and compressed when high-cell-density cultures were exposed to full solar radiation during long-term experiments. When UV-B was screened off, the filaments initially broke, but they elongated and became loosely arranged later (i.e., there were fewer spirals per unit of filament length). When UVR was filtered out, the spiral structure hardly broke or became looser. Photosynthetic 0, evolution in the presence of UVR was significantly suppressed in the indoor strain compared to the outdoor strain. UVR-induced inhibition increased with exposure time, and it was significantly lower in the outdoor strain. The concentration of UV-absorbing compounds was low in both strains, and there was no significant change in the amount regardless of the radiation treatment, suggesting that these compounds were not effectively used as protection against solar UVR. Self-shading, on the other hand, produced by compression of the spirals over adaptive time scales, seems to play an important role in protecting this species against deleterious UVR. Our findings suggest that the increase in UV-B irradiance due to ozone depletion not only might affect photosynthesis but also might alter the morphological development of filamentous cyanobacteria during acclimation or over adaptive time scales. |
| 英文摘要 | To study the impact of solar UV radiation (UVR) (280 to 400 nm) on the filamentous cyanobacterium Arthrospira (Spirulina) platensis, we examined the morphological changes and photosynthetic performance using an indoor-grown strain (which had not been exposed to sunlight for decades) and an outdoor-grown strain (which had been grown under sunlight for decades) while they were cultured with three solar radiation treatments: PAB (photosynthetically active radiation [PAR] plus UVR; 280 to 700 nm), PA (PAR plus UV-A; 320 to 700 nm), and P (PAR only; 400 to 700 nm). Solar UVR broke the spiral filaments of A. platensis exposed to full solar radiation in short-term low-cell-density cultures. This breakage was observed after 2 h for the indoor strain but after 4 to 6 h for the outdoor strain. Filament breakage also occurred in the cultures exposed to PAR alone; however, the extent of breakage was less than that observed for filaments exposed to full solar radiation. The spiral filaments broke and compressed when high-cell-density cultures were exposed to full solar radiation during long-term experiments. When UV-B was screened off, the filaments initially broke, but they elongated and became loosely arranged later (i.e., there were fewer spirals per unit of filament length). When UVR was filtered out, the spiral structure hardly broke or became looser. Photosynthetic 0, evolution in the presence of UVR was significantly suppressed in the indoor strain compared to the outdoor strain. UVR-induced inhibition increased with exposure time, and it was significantly lower in the outdoor strain. The concentration of UV-absorbing compounds was low in both strains, and there was no significant change in the amount regardless of the radiation treatment, suggesting that these compounds were not effectively used as protection against solar UVR. Self-shading, on the other hand, produced by compression of the spirals over adaptive time scales, seems to play an important role in protecting this species against deleterious UVR. Our findings suggest that the increase in UV-B irradiance due to ozone depletion not only might affect photosynthesis but also might alter the morphological development of filamentous cyanobacteria during acclimation or over adaptive time scales. |
| WOS标题词 | Science & Technology ; Life Sciences & Biomedicine |
| 学科主题 | Biotechnology & Applied Microbiology; Microbiology |
| 类目[WOS] | Biotechnology & Applied Microbiology ; Microbiology |
| 研究领域[WOS] | Biotechnology & Applied Microbiology ; Microbiology |
| 关键词[WOS] | ULTRAVIOLET-B RADIATION ; INDUCED DNA-DAMAGE ; BLUE-GREEN-ALGA ; SPIRULINA-PLATENSIS ; NITROGEN-METABOLISM ; OZONE DEPLETION ; LIGHT ; IRRADIATION ; REPAIR ; PHOTOINHIBITION |
| 收录类别 | SCI |
| 语种 | 英语 |
| WOS记录号 | WOS:000231897400009 |
| 公开日期 | 2010-10-13 |
| 源URL | [http://ir.ihb.ac.cn/handle/152342/9156]  |
| 专题 | 水生生物研究所_中科院水生所知识产出（2009年前）_期刊论文 |
| 作者单位 | 1.Shantou Univ, Inst Marine Biol, Shantou 515063, Guangdong, Peoples R China 2.Chinese Acad Sci, Inst Hydrobiol, Wuhan 430072, Hubei, Peoples R China 3.Estac Fotobiol Playa Union, RA-9103 Rawson, Chubut, Argentina 4.Consejo Nacl Invest Cient & Tecn, RA-9103 Rawson, Chubut, Argentina 5.Hainan DIC Microalgae Co Ltd, Haikou Int Commercial Ctr, Haikou 570102, Hainan, Peoples R China |
| 推荐引用方式 GB/T 7714 | Wu, HY,Gao, KS,Villafane, VE,et al. Effects of solar UV radiation on morphology and photosynthesis of filamentous cyanobacterium Arthrospira platensis[J]. APPLIED AND ENVIRONMENTAL MICROBIOLOGY,2005,71(9):5004-5013. |
| APA | Wu, HY,Gao, KS,Villafane, VE,Watanabe, T,&Helbling, EW.(2005).Effects of solar UV radiation on morphology and photosynthesis of filamentous cyanobacterium Arthrospira platensis.APPLIED AND ENVIRONMENTAL MICROBIOLOGY,71(9),5004-5013. |
| MLA | Wu, HY,et al."Effects of solar UV radiation on morphology and photosynthesis of filamentous cyanobacterium Arthrospira platensis".APPLIED AND ENVIRONMENTAL MICROBIOLOGY 71.9(2005):5004-5013. |
入库方式： OAI收割
来源：水生生物研究所
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