Compensatory growth in Microcystis aeruginosa after moderate high-temperature exposure

  • Wei Han Nanjing University of Information Science &Technology, China.
  • Yuanshu Jing | jingyshu@163.com Nanjing University of Information Science &Technology, China.
  • Ting Li Nanjing University of Information Science &Technology, China.

Abstract

This study aimed to investigate the mechanisms involved in Microcystis aeruginosa (M. aeruginosa) compensatory growth after moderate high-temperature stress. In the experiment, M. aeruginosa were cultured for 3, 6, and 12 d at 35°C before being transferred to normal conditions (25°C), and then cultured for 30 days for recovery. The algae that were cultured constantly at 25°C were set as control. The results showed that the growth of M. aeruginosa was inhibited significantly by the moderate high-temperature stress. During the recovery phase, the M. aeruginosa cultured at 35°C for 3, 6, and 12 days exhibited under-compensation, over-compensation, and equal-compensation, respectively. To cope with moderate high-temperature stress, M. aeruginosa implement various mechanisms, including increasing antioxidant enzyme activities and chlorophyll a content; adjusting compatible solutes (soluble protein and sugar). The M. aeruginosa cultured at 35°C for 6 days has higher antioxidant enzyme activities, relatively low malondialdehyde content, and higher soluble sugar content during the recovery phase; therefore, M. aeruginosa cultured at 35°C for 6 days exhibited over-compensation growth. Grey correlation analysis revealed that the increase of chlorophyll a, soluble sugar, and superoxide dismutase activity play key roles in the compensatory growth of M. aeruginosa.

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Author Biographies

Wei Han, Nanjing University of Information Science &Technology
Jiangsu Key Laboratory of Agricultural Meteorology, College of Applied Meteorology
Yuanshu Jing, Nanjing University of Information Science &Technology
Jiangsu Key Laboratory of Agricultural Meteorology, College of Applied Meteorology
Ting Li, Nanjing University of Information Science &Technology
Jiangsu Key Laboratory of Agricultural Meteorology, College of Applied Meteorology
Published
2015-04-22
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Original Articles
Supporting Agencies
Jiangsu Key Laboratory of Agricultural Meteorology, Natural Science Fund for Colleges and Universities in Jiangsu Province, Support Program of Science and Technology in Jiangsu Province, Open Foundation of the State Key Laboratory of Soil and Sustainable.
Keywords:
Moderate high-temperature stress, Microcystis aeruginosa, over-compensatory growth, antioxidant enzymes.
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How to Cite
1.
Han W, Jing Y, Li T. Compensatory growth in Microcystis aeruginosa after moderate high-temperature exposure. J Limnol [Internet]. 2015Apr.22 [cited 2021May17];74(3). Available from: https://jlimnol.it/index.php/jlimnol/article/view/jlimnol.2015.1164