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Effects of alkalinity variations on photosynthetic activity and exopotysaccharides of Chlorella pyrenoidosa
Kang Lijuan; Pan Xiaojie; Chang Fengyi; Li Dunhai; Shen Yinwu; Liu Yongding (liuyd@ihb.ac.cn); Chinese Acad Sci, Inst Hydrobiol, Wuhan 430072, Peoples R China
2008
Source PublicationHupo Kexue
ISSN1003-5427
Volume20Issue:2Pages:251-256
AbstractEffects of bicarbonate (HCO3-) alkalinity on the photosynthetic performance of Chlorella pyrenoidosa was investigated in present study. Photosynthetic activity, pigments, MDA and ultrastructure of Chlorella pyrenoidosa were measured for when they were cultured at two different alkalinities including 2.3mmol/L (ALK2.3) and 12.4mmol/L (ALK12.4), respectivily. At ALK2.3, photosynthetic activity was stimulated at the prophase of culture and then inhibited at the anaphase. At ALK 12.4, it represented the same phenomenon, but inhibition effects were weaker than those at ALK2.3. Ratios of Chl.b/Chl.a was increased, but Caro/TChl ratios was decreased at elevated alkalinities. The contents of MDA increased at ALK2.3 and decreased at ALK12.4. In addition, secretion of glycocalix-like layer was remarkably stimulated at elevated alkalinities. These results showed that elevated alkalinities promoted algae carbon assimilation and stimulated secretion of glycocalix-like layer. Carbohydrate could alleviate stresses at elevated alkalinities. Secretion of glycocalix-like layer could decrease the synthesis of excess products of photosynthesis and relieve feedback inhibition, which will increase the stress tolerance of C. pyenoidosa at elevated alkalinities.
Indexed By其他
Document Type期刊论文
Identifierhttp://ir.ihb.ac.cn/handle/342005/18809
Collection期刊论文
Corresponding AuthorKang Lijuan; Chinese Acad Sci, Inst Hydrobiol, Wuhan 430072, Peoples R China
Recommended Citation
GB/T 7714
Kang Lijuan,Pan Xiaojie,Chang Fengyi,et al. Effects of alkalinity variations on photosynthetic activity and exopotysaccharides of Chlorella pyrenoidosa[J]. Hupo Kexue,2008,20(2):251-256.
APA Kang Lijuan.,Pan Xiaojie.,Chang Fengyi.,Li Dunhai.,Shen Yinwu.,...&Chinese Acad Sci, Inst Hydrobiol, Wuhan 430072, Peoples R China.(2008).Effects of alkalinity variations on photosynthetic activity and exopotysaccharides of Chlorella pyrenoidosa.Hupo Kexue,20(2),251-256.
MLA Kang Lijuan,et al."Effects of alkalinity variations on photosynthetic activity and exopotysaccharides of Chlorella pyrenoidosa".Hupo Kexue 20.2(2008):251-256.
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