| DIFFERENTIAL RESPONSES OF ANABAENA SP PCC 7120 (CYANOPHYCEAE) CULTURED IN NITROGEN-DEFICIENT AND NITROGEN-ENRICHED MEDIA TO ULTRAVIOLET-B RADIATION | |
| Qin, Hongjie1,2; Peng, Chengrong1,2; Liu, Yongding1; Li, Dunhai1; Li, DH (reprint author), Chinese Acad Sci, Inst Hydrobiol, Wuhan 430072, Peoples R China. | |
| 2012-06-01 | |
| Source Publication | JOURNAL OF PHYCOLOGY
 |
| ISSN | 0022-3646 |
| Volume | 48Issue:3Pages:615-625 |
| Abstract | 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.; 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. |
| Subtype | Article |
| Keyword | Anabaena Sp Pcc 7120 Atpase Activity Compensatory Growth Complementary Chromatic Acclimation Morphology Photosynthesis Ultraviolet b |
| Department | [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 |
| DOI | 10.1111/j.1529-8817.2012.01162.x |
| WOS Headings | Science & Technology ; Life Sciences & Biomedicine |
| Funding Organization | National Natural Science Foundation of China[40971249]; National Major Programs of Water Body Pollution Control and Remediation[2009ZX07106-001-003, 2009ZX07104-005] ; National Natural Science Foundation of China[40971249]; National Major Programs of Water Body Pollution Control and Remediation[2009ZX07106-001-003, 2009ZX07104-005] ; National Natural Science Foundation of China[40971249]; National Major Programs of Water Body Pollution Control and Remediation[2009ZX07106-001-003, 2009ZX07104-005] ; National Natural Science Foundation of China[40971249]; National Major Programs of Water Body Pollution Control and Remediation[2009ZX07106-001-003, 2009ZX07104-005] |
| Indexed By | SCI |
| Language | 英语 |
| WOS Research Area | Plant Sciences ; Marine & Freshwater Biology |
| WOS Subject | Plant Sciences ; Marine & Freshwater Biology |
| WOS ID | WOS:000304810200013 |
| WOS Keyword | RESOLVED ENERGY-TRANSFER ; UV-B ; GREEN-ALGA ; CYANOBACTERIUM ARTHROSPIRA ; PORPHYRIDIUM-CRUENTUM ; COMPENSATORY GROWTH ; PHOTOSYSTEM-II ; DNA-DAMAGE ; AMINO-ACID ; PHOTOSYNTHESIS |
| Funding Organization | National Natural Science Foundation of China[40971249]; National Major Programs of Water Body Pollution Control and Remediation[2009ZX07106-001-003, 2009ZX07104-005] ; National Natural Science Foundation of China[40971249]; National Major Programs of Water Body Pollution Control and Remediation[2009ZX07106-001-003, 2009ZX07104-005] ; National Natural Science Foundation of China[40971249]; National Major Programs of Water Body Pollution Control and Remediation[2009ZX07106-001-003, 2009ZX07104-005] ; National Natural Science Foundation of China[40971249]; National Major Programs of Water Body Pollution Control and Remediation[2009ZX07106-001-003, 2009ZX07104-005] |
| Citation statistics | |
| Document Type | 期刊论文 |
| Identifier | http://ir.ihb.ac.cn/handle/342005/16977 |
| Collection | 水环境工程研究中心_期刊论文 |
| Corresponding Author | Li, DH (reprint author), Chinese Acad Sci, Inst Hydrobiol, Wuhan 430072, Peoples R China. |
| Affiliation | 1.Chinese Acad Sci, Inst Hydrobiol, Wuhan 430072, Peoples R China 2.Chinese Acad Sci, Grad Univ, Beijing 100049, Peoples R China |
| Recommended Citation GB/T 7714 | Qin, Hongjie,Peng, Chengrong,Liu, Yongding,et al. DIFFERENTIAL RESPONSES OF ANABAENA SP PCC 7120 (CYANOPHYCEAE) CULTURED IN NITROGEN-DEFICIENT AND NITROGEN-ENRICHED MEDIA TO ULTRAVIOLET-B RADIATION[J]. JOURNAL OF PHYCOLOGY,2012,48(3):615-625. |
| APA | Qin, Hongjie,Peng, Chengrong,Liu, Yongding,Li, Dunhai,&Li, DH .(2012).DIFFERENTIAL RESPONSES OF ANABAENA SP PCC 7120 (CYANOPHYCEAE) CULTURED IN NITROGEN-DEFICIENT AND NITROGEN-ENRICHED MEDIA TO ULTRAVIOLET-B RADIATION.JOURNAL OF PHYCOLOGY,48(3),615-625. |
| MLA | Qin, Hongjie,et al."DIFFERENTIAL RESPONSES OF ANABAENA SP PCC 7120 (CYANOPHYCEAE) CULTURED IN NITROGEN-DEFICIENT AND NITROGEN-ENRICHED MEDIA TO ULTRAVIOLET-B RADIATION".JOURNAL OF PHYCOLOGY 48.3(2012):615-625. |
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