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恭喜，已被收录 Accession number: 20151800813165 Title: Compensatory growth effect of Microcystis aeruginosa after high temperature stress Authors: Li, Ting1, 4 Email author liting29320@sina.com; Jing, Yuanshu1, 2 Email author jingyshu@163.com; Han, Wei1, 2; Luo, Jühua3 Author affiliation: 1 Collaborative Innovation Center on Forecast and Evaluation of Meteorological Disasters, School of Applied Meteorology of Nanjing University of Information Science and Technology, Nanjing, China 2 Jiangsu Key Laboratory of Agricultural Meteorology, School of Applied Meteorology of Nanjing University of Information Science and Technology, Nanjing, China 3 Nanjing Institute of Geography and Limnology, Chinese Academy of Sciences, Nanjing, China 4 Hebei Meteorological Bureau, Shijiazhuang, China Corresponding author: Jing, Yuanshu Source title: Research of Environmental Sciences Abbreviated source title: Res. Environ. Sci. Volume: 28 Issue: 4 Issue date: April 1, 2015 Publication year: 2015 Pages: 638-646 Language: Chinese ISSN: 10016929 Document type: Journal article (JA) Publisher: Editorial department of Molecular Catalysis, Tianshui Road No. 18, Lanzhou City, Gansu Province,, 730000, China Abstract: Cyanobacteria blooms have become a global problem that destroy water environments. Frequent algae blooms are influenced by short-term changes in temperature. Some studies have shown that several microalgae, such as Pavlova viridis and Tetraselmis tetrethele, apparently show over-compensatory growth after UV-B or nutrient deficiency stress, but there is little information about the over-compensatory growth of microalgae after high temperature stress. To study the recovery growth of algae after high temperature stress, Microcystis aeruginosa was used as an experimental material. Two experiments were conducted. Three groups of M. aeruginosa were cultured under 40 respectively for 3, 6, and 12 days before being transferred to 25 conditions with the same inoculation density as in the first experiments. The second experiment was set as the control, in which M. aeruginosa was cultured under 25 the entire time. Cell density, chlorophyll-a, carotenoid, incellular protein, carbohydrate and malondialdehyde were measured during the process. The results showed that under the high temperature stress, the growth of M. aeruginosa was inhibited significantly, with decreases of 81.08%, 97.89% and 90.31% in cell density, chlorophyll-a and carotenoid, respectively, on the 12<sup>th</sup> day. After the relief of the high temperature stress, the 40 for three days group showed over-compensation, with 30-day average compensation indexes of 1.63, 0.90 and 2.12 for cell density, chlorophyll-a and carotenoid, respectively. The two groups of 40 for 6 and 12 days showed under-compensation. On the 30<sup>th</sup> day, the protein contents of the two groups were 14.86% and 48.75%, and the carbohydrate contents were 18.77% and 53.73% lower than the control, respectively. The longer the period of stress, the higher the content of malondialdehyde, and long period stress (12 days) could cause irreversible harm to algae cells. The growth curves fitted with Logistic model indicated that the 40 for 6 days group would show obvious over-compensation after 24 days recovery, and have a larger cell density than the 40 for 3 days group would have after the 39<sup>th</sup> day recovery. The over-compensation effect induced by high temperature stress was closely related to algal blooming processes. The endogenous factor and the change of algae physiological characteristics may provide basic support for lake algae bloom theoretical research. ©, 2015, Editorial department of Molecular Catalysis. All right reserved. Number of references: 32 Main heading: Stress relief Controlled terms: Aldehydes - Algae - Bacteria - Carbohydrates - Cells - Chlorophyll - Cytology - Microorganisms - Molecular biology - Pigments - Proteins - Recovery Uncontrolled terms: After high temperature - Compensation effects - Experimental materials - High temperature stress - Malondialdehyde - Microcystis aeruginosa - Physiological characteristics - Theoretical research Classification code: 421 Strength of Building Materials; Mechanical Properties - 461.2 Biological Materials and Tissue Engineering - 461.9 Biology - 531 Metallurgy and Metallography - 803 Chemical Agents and Basic Industrial Chemicals - 804 Chemical Products Generally - 804.1 Organic Compounds DOI: 10.13198/j.issn.1001-6929.2015.04.20 Database: Compendex Compilation and indexing terms, © 2015 Elsevier Inc. |
2楼2015-06-05 16:28:54
