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题名: DIFFERENTIAL RESPONSES OF ANABAENA SP PCC 7120 (CYANOPHYCEAE) CULTURED IN NITROGEN-DEFICIENT AND NITROGEN-ENRICHED MEDIA TO ULTRAVIOLET-B RADIATION
作者: Qin, Hongjie1, 2; Peng, Chengrong1, 2; Liu, Yongding1; Li, Dunhai1
通讯作者: Li, DH (reprint author), Chinese Acad Sci, Inst Hydrobiol, Wuhan 430072, Peoples R China.
关键词: Anabaena sp ; PCC 7120 ; ATPase activity ; compensatory growth ; complementary chromatic acclimation ; morphology ; photosynthesis ; ultraviolet B
刊名: JOURNAL OF PHYCOLOGY
发表日期: 2012-06-01
DOI: 10.1111/j.1529-8817.2012.01162.x
卷: 48, 期:3, 页:615-625
收录类别: SCI
文章类型: Article
部门归属: [Qin, Hongjie; Peng, Chengrong; Liu, Yongding; Li, Dunhai] Chinese Acad Sci, Inst Hydrobiol, Wuhan 430072, Peoples R China; [Qin, Hongjie; Peng, Chengrong] Chinese Acad Sci, Grad Univ, Beijing 100049, Peoples R China
WOS标题词: Science & Technology ; Life Sciences & Biomedicine
资助者: National Natural Science Foundation of China[40971249]; National Major Programs of Water Body Pollution Control and Remediation[2009ZX07106-001-003, 2009ZX07104-005]
类目[WOS]: Plant Sciences ; Marine & Freshwater Biology
研究领域[WOS]: Plant Sciences ; Marine & Freshwater Biology
摘要: Stratospheric ozone depletion increases the amount of ultraviolet-B radiation (UVBR) (280320 nm) reaching the surface of the earth, potentially affecting phytoplankton. In this work, Anabaena sp. PCC 7120, a typically nitrogen (N)-fixing filamentous bloom-forming cyanobacterium in freshwater, was individually cultured in N-deficient and N-enriched media for long-term acclimation before being subjected to ultraviolet-B (UVB) exposure experiments. Results suggested that the extent of breakage in the filaments induced by UVBR increases with increasing intensity of UVB stress. In general, except for the 0.1 W . m-2 treatment, which showed a mild increase, UVB exposure inhibits photosynthesis as evidenced by the decrease in the chl fluorescence parameters maximum photochemical efficiency of PSII (Fv/Fm) and maximum relative electron transport rate. Complementary chromatic acclimation was also observed in Anabaena under different intensities of UVB stress. Increased total carbohydrate and soluble protein may provide some protection for the culture against damaging UVB exposure. In addition, N-deficient cultures with higher recovery capacity showed overcompensatory growth under low UVB (0.1 W . m-2) exposure during the recovery period. Significantly increased (similar to 830%) ATPase activity may provide enough energy to repair the damage caused by exposure to UVB.
英文摘要: Stratospheric ozone depletion increases the amount of ultraviolet-B radiation (UVBR) (280320 nm) reaching the surface of the earth, potentially affecting phytoplankton. In this work, Anabaena sp. PCC 7120, a typically nitrogen (N)-fixing filamentous bloom-forming cyanobacterium in freshwater, was individually cultured in N-deficient and N-enriched media for long-term acclimation before being subjected to ultraviolet-B (UVB) exposure experiments. Results suggested that the extent of breakage in the filaments induced by UVBR increases with increasing intensity of UVB stress. In general, except for the 0.1 W . m-2 treatment, which showed a mild increase, UVB exposure inhibits photosynthesis as evidenced by the decrease in the chl fluorescence parameters maximum photochemical efficiency of PSII (Fv/Fm) and maximum relative electron transport rate. Complementary chromatic acclimation was also observed in Anabaena under different intensities of UVB stress. Increased total carbohydrate and soluble protein may provide some protection for the culture against damaging UVB exposure. In addition, N-deficient cultures with higher recovery capacity showed overcompensatory growth under low UVB (0.1 W . m-2) exposure during the recovery period. Significantly increased (similar to 830%) ATPase activity may provide enough energy to repair the damage caused by exposure to UVB.
关键词[WOS]: RESOLVED ENERGY-TRANSFER ; UV-B ; GREEN-ALGA ; CYANOBACTERIUM ARTHROSPIRA ; PORPHYRIDIUM-CRUENTUM ; COMPENSATORY GROWTH ; PHOTOSYSTEM-II ; DNA-DAMAGE ; AMINO-ACID ; PHOTOSYNTHESIS
语种: 英语
WOS记录号: WOS:000304810200013
ISSN号: 0022-3646
Citation statistics:
内容类型: 期刊论文
URI标识: http://ir.ihb.ac.cn/handle/342005/16977
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, Wuhan 430072, Peoples R China
2.Chinese Acad Sci, Grad Univ, Beijing 100049, Peoples R China

Recommended Citation:
Qin, Hongjie; Peng, Chengrong; Liu, Yongding; Li, Dunhai.DIFFERENTIAL RESPONSES OF ANABAENA SP PCC 7120 (CYANOPHYCEAE) CULTURED IN NITROGEN-DEFICIENT AND NITROGEN-ENRICHED MEDIA TO ULTRAVIOLET-B RADIATION,JOURNAL OF PHYCOLOGY,2012,48(3):615-625
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