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Effects of alkalinity on photosynthesis activity and ultrastructure of Microcystis aeruginosa FACHB 905
Kang Li-Juan; Pan Xiao-Jie; Chang Feng-Yi; Li Dun-Hai; Shen Yin-Wu; Liu Yong-Ding (liuvd@ihb.ac.cn); Chinese Acad Sci, Inst Hydrobiol, Wuhan 430072, Peoples R China
2008
Source PublicationWuhan Zhiwuxue Yanjiu
ISSN1000-470X
Volume26Issue:1Pages:70-75
AbstractThe effect of alkalinity on terrestrial plants has been studied extensively,but little is known for aquatic plants, particularly for its effect on freshwater bloom-algae. Therefore, the bloom forming blue-green alga Microcystis aeruginosa FACHB 905 was chosen in the current study and cultured in medium with 2.3 mmol/L HCO3- (ALK2.3) or 12.4 mmol/L HCO3- (ALK12.4) in order to compare the growth, photosynthetic performance, pigments, malondialdehyde ( MDA) and ultrastructure at different alkalinity. Compared with the control, the biomass of ALK2.3 and ALK12.4 treatments decreased by 7% and 55% after 13 days culture, respectively. The contents of chlorophyll a of ALK22.3 and ALK12.4 treatments were also decreased by 22% and 88% during the same period, respectively. At ALK2.3, Ch1 a was decreased significantly from the 7th day except for the 9th day,while Chlorophyll a/phycocyanin (Chl a/PC) ratio did not change much except on the 7th day. At ALK12.4, Chl a began to increase after the 5 th day and reached the maximum on the 7th day. Chl a became lower than that of the control after the 9th day. The Chl a/PC ratio increased on the 3rd day and then declined. At ALK2.3, photosynthetic activity was inhibited at the first 7 days of culture and then recovered to normal level. At ALK12.4, the photosynthetic activity also showed a similar inhibition-recovery mode, but it did not restore the normal level at the end of culture. The MDA contents of both ALK12.4 and ALK2.3 treatments were increased, but the degree was higher under ALK12.4 than under ALK2.3. The number of liposomes in ALK12.4 treatment was more than that of ALK2.3 which in turn was more than that of the control, while number of thylakoids was in a reverse order. In summary, the biomass was decreased by elevated alkalinity, which might be due to the decreased photosynthetic activity and damage of photosynthetic apparatus.
Indexed By其他
Document Type期刊论文
Identifierhttp://ir.ihb.ac.cn/handle/342005/18815
Collection期刊论文
Corresponding AuthorKang Li-Juan; Chinese Acad Sci, Inst Hydrobiol, Wuhan 430072, Peoples R China
Recommended Citation
GB/T 7714
Kang Li-Juan,Pan Xiao-Jie,Chang Feng-Yi,et al. Effects of alkalinity on photosynthesis activity and ultrastructure of Microcystis aeruginosa FACHB 905[J]. Wuhan Zhiwuxue Yanjiu,2008,26(1):70-75.
APA Kang Li-Juan.,Pan Xiao-Jie.,Chang Feng-Yi.,Li Dun-Hai.,Shen Yin-Wu.,...&Chinese Acad Sci, Inst Hydrobiol, Wuhan 430072, Peoples R China.(2008).Effects of alkalinity on photosynthesis activity and ultrastructure of Microcystis aeruginosa FACHB 905.Wuhan Zhiwuxue Yanjiu,26(1),70-75.
MLA Kang Li-Juan,et al."Effects of alkalinity on photosynthesis activity and ultrastructure of Microcystis aeruginosa FACHB 905".Wuhan Zhiwuxue Yanjiu 26.1(2008):70-75.
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