Show simple item record

dc.contributor.authorGao, Kunshan
dc.contributor.author高坤山
dc.contributor.authorLi, Ping(Shantou Univ, Inst Marine Biol, Shantou 515063, Guangdong, Peoples R China)
dc.contributor.authorWatanabe, Teruo(Hainan DIC Microalgae Co Ltd, Haikou Int Commercial Ctr 38, Haikou 570102, Hainan, Peoples R China)
dc.contributor.authorHelbling, E. Walter(Shantou Univ, Inst Marine Biol, Shantou 515063, Guangdong, Peoples R China)
dc.date.accessioned2011-05-19T16:00:59Z
dc.date.available2011-05-19T16:00:59Z
dc.date.issued2008-06
dc.identifier.citationJOURNAL OF PHYCOLOGY,2008,44(3):777-786zh_CN
dc.identifier.issn0022-3646
dc.identifier.urihttp://dx.doi.org/doi: 10.1111/j.1529-8817.2008.00512.x
dc.identifier.urihttps://dspace.xmu.edu.cn/handle/2288/9047
dc.description.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.zh_CN
dc.language.isoenzh_CN
dc.publisherBLACKWELL PUBLISHINGzh_CN
dc.subjectArthrospira platensiszh_CN
dc.subjectcyanobacteriumzh_CN
dc.subjectDNA damagezh_CN
dc.subjectmorphologyzh_CN
dc.subjectphotosynthesiszh_CN
dc.subjecttemperaturezh_CN
dc.subjectUVRzh_CN
dc.titleCombined effects of ultraviolet radiation and temperature on morphology, photosynthesis, and DNA of Arthrospira (Spirulina) platensis (Cyanophyta)zh_CN
dc.typeArticlezh_CN


Files in this item

Thumbnail

This item appears in the following Collection(s)

Show simple item record