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Composition and activity of external carbonic anhydrase of microalgae from karst lakes in China
Author(s) -
Wu Yanyou,
Li Pingping,
Wang Baoli,
Liu Congqiang,
He Mei,
Chen Chuan
Publication year - 2008
Publication title -
phycological research
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.438
H-Index - 44
eISSN - 1440-1835
pISSN - 1322-0829
DOI - 10.1111/j.1440-1835.2008.00487.x
Subject(s) - photosynthesis , carbonic anhydrase , biology , chlorophyceae , algae , karst , cyanobacteria , bicarbonate , productivity , botany , ecology , green algae , environmental chemistry , enzyme , biochemistry , chlorophyta , chemistry , bacteria , paleontology , genetics , macroeconomics , economics , endocrinology
SUMMARY The species composition, the net photosynthetic O 2 evolution rate and the activity of external carbonic anhydrase (CA) of microalgae from three reservoirs were studied. Carbonic anhydrase activity had a significant positive correlation with the density of Cyanobacteria in Lake Aha. Microalgae's carbonic anhydrase activity in Lakes Baihua and Hongfeng was related to the density of Chlorophyceae. The species abundances of microalgae in Lake Aha, Lake Baihua, and Lake Hongfeng were different. A relationship between carbonic anhydrase activity and net photosynthetic O 2 evolution rate had also been established. Algae with external CA influenced the algal productivity. These results demonstrate the role of external CA in facilitating the availability of CO 2 that limits the photosynthesis of microalgae in karst lakes in China.