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题名: Enhanced Resistance to UV-B Radiation in Anabaena sp PCC 7120 (Cyanophyceae) by Repeated Exposure
作者: Qin, Hongjie1, 2; Li, Dunhai1
通讯作者: Li, DH (reprint author), Chinese Acad Sci, Inst Hydrobiol, Key Lab Algal Biol, Wuhan 430072, Peoples R China.
关键词: ULTRAVIOLET-RADIATION ; HETEROCYST DEVELOPMENT ; PHOTOSYNTHESIS ; TEMPERATURE ; CYANOBACTERIA ; NITROGEN ; PLANTS ; DAMAGE ; OZONE ; EUTROPHICATION
刊名: CURRENT MICROBIOLOGY
发表日期: 2014-07-01
DOI: 10.1007/s00284-014-0543-6
卷: 69, 期:1, 页:1-9
收录类别: SCI
文章类型: Article
部门归属: [Qin, Hongjie; Li, Dunhai] Chinese Acad Sci, Inst Hydrobiol, Key Lab Algal Biol, Wuhan 430072, Peoples R China; [Qin, Hongjie] Univ Chinese Acad Sci, Beijing 100049, Peoples R China
WOS标题词: Science & Technology ; Life Sciences & Biomedicine
资助者: National Major Program of Water Body Pollution Control and Remediation [2012ZX07103003-02]
类目[WOS]: Microbiology
研究领域[WOS]: Microbiology
摘要: In natural habitats, organisms especially phytoplankton are not always continuously subjected to ultraviolet-B radiation (UVBR). By simulation of the natural situation, the N-2-fixing cyanobacterium Anabaena sp. PCC 7120 was subjected to UV-B exposure and recovery cycles. A series of morphological and physiological changes were observed in Anabaena sp. PCC 7120 under repeated UVBR when compared with controls. Such as the breakage of filaments, intervals between heterocysts, heterocyst frequency, total carbohydrate, and carotenoids were increased, while the nitrogenase activity and photosynthetic activity were inhibited by repeated UVBR; however, these activities could recover when UV-B stress was removed. Unexpectedly, the over-compensatory growth was observed at the end of the second round of exposure and recovery cycle. Our results showed that discontinuous UVBR could increase the growth rate and the tolerance as well as repair capacity of Anabaena sp. PCC 7120. These results indicate that moderate UVBR may increase the growth of cyanobacteria in natural habitats.
英文摘要: In natural habitats, organisms especially phytoplankton are not always continuously subjected to ultraviolet-B radiation (UVBR). By simulation of the natural situation, the N-2-fixing cyanobacterium Anabaena sp. PCC 7120 was subjected to UV-B exposure and recovery cycles. A series of morphological and physiological changes were observed in Anabaena sp. PCC 7120 under repeated UVBR when compared with controls. Such as the breakage of filaments, intervals between heterocysts, heterocyst frequency, total carbohydrate, and carotenoids were increased, while the nitrogenase activity and photosynthetic activity were inhibited by repeated UVBR; however, these activities could recover when UV-B stress was removed. Unexpectedly, the over-compensatory growth was observed at the end of the second round of exposure and recovery cycle. Our results showed that discontinuous UVBR could increase the growth rate and the tolerance as well as repair capacity of Anabaena sp. PCC 7120. These results indicate that moderate UVBR may increase the growth of cyanobacteria in natural habitats.
关键词[WOS]: ULTRAVIOLET-RADIATION ; HETEROCYST DEVELOPMENT ; PHOTOSYNTHESIS ; TEMPERATURE ; CYANOBACTERIA ; NITROGEN ; PLANTS ; DAMAGE ; OZONE ; EUTROPHICATION
语种: 英语
WOS记录号: WOS:000336396500001
ISSN号: 0343-8651
Citation statistics:
内容类型: 期刊论文
URI标识: http://ir.ihb.ac.cn/handle/342005/20061
Appears in Collections:水环境工程研究中心_期刊论文

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作者单位: 1.Chinese Acad Sci, Inst Hydrobiol, Key Lab Algal Biol, Wuhan 430072, Peoples R China
2.Univ Chinese Acad Sci, Beijing 100049, Peoples R China

Recommended Citation:
Qin, Hongjie; Li, Dunhai.Enhanced Resistance to UV-B Radiation in Anabaena sp PCC 7120 (Cyanophyceae) by Repeated Exposure,CURRENT MICROBIOLOGY,2014,69(1):41648
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