CO2 EFFECT OF DOUBLED CO2 AND SALINITY ON SOME PHYSIOLOGICAL CHARACTERISTICS OF APHANIZOMENON FLOSA2QUAE

KANG Li-Juan; LIU Yong-Mei; LI Dun-Hai; LIU Yong-Din

Volume 31 Issue 5

Aug. 2014

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ACTA HYDROBIOLOGICA SINICA > 2007 > 31(5): 671-674.

KANG Li-Juan, LIU Yong-Mei, LI Dun-Hai, LIU Yong-Din. CO2 EFFECT OF DOUBLED CO2 AND SALINITY ON SOME PHYSIOLOGICAL CHARACTERISTICS OF APHANIZOMENON FLOSA2QUAE[J]. ACTA HYDROBIOLOGICA SINICA, 2007, 31(5): 671-674.

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CO2 EFFECT OF DOUBLED CO2 AND SALINITY ON SOME PHYSIOLOGICAL CHARACTERISTICS OF APHANIZOMENON FLOSA2QUAE

Institute of Hydrobiology, the Chinese Academy of Sciences, Wuhan 430072;
2. Graduate school of the Chinese Academy of Sciences, Beijing, 100039;
3. College of Pharmacy Wuhan University, Wuhan 430072

Received Date: January 03, 2006
Rev Recd Date: December 10, 2006
Published Date: September 24, 2007

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Abstract

Aphanizomenon flos-aquae bloom appears regularly nearly at March in recent years. In order to investigate the response of the cyanobacterium A. flos-aquae to the combination of doubled CO2concentration and salinity, an experiment was carried out. Growth rate, photosynthesis, maximal electron transport rate (ETRmax), the ratio of photosynthetic pigment chlorophyll a to phycocyanin (Chl a/ PC) and malondialdehyde (MDA) levels of A. flos-aquae were analyzed. The results demonstrated that salt stress caused decrease in A. flos2aquae growth by disrupting physiological processes, especially photosynthesis. Increased salinity lowered ETRmax. MDA content was increased when salinity elevated. And higher salinity has more distinct effect. Growth rate, ETRmax and Chl a/ PC could be enhanced by elevated CO2concentration, while doubled CO2reduced MDA content.
- Doubled CO2,
- Salinity,
- ETRmax,
- MDA

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CO2 EFFECT OF DOUBLED CO2 AND SALINITY ON SOME PHYSIOLOGICAL CHARACTERISTICS OF APHANIZOMENON FLOSA2QUAE

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