Net Photosynthetic O2 Evolution And Calcium
Precipitation In Chlamydomonas Reinhardtii
Author(s)
Y. Y. Wu, P. P. Li, B. L. Wang & C. Q. Liu
Abstract
The relationship between carbonic anhydrase activity, net photosynthetic O2
evolution rate and calcium precipitation in Chlamydomonas reinhardtii was
studied. By adding bovine carbonic anhydrase and inhibitor of carbonic
anhydrase-acetazolamide to SE medium to alter the activity of external carbonic
anhydrase, the variation of net photosynthetic O2 evolution rate and calcium
precipitation in Chlamydomonas reinhardtii was determined. Calcium
precipitation of Chlamydomonas reinhardtii was determined by the difference of
algal calcium content during the culture period. The result shows that net
photosynthetic O2 evolution rate and calcium precipitation in Chlamydomonas
reinhardtii were enhanced when bovine carbonic anhydrase was added to
medium. Acetazolamide can inhibit calcium precipitation and photosynthetic O2
evolution. Carbonic anhydrase may be an important factor to accelerate algal
calcium precipitation. Moreover, the geological significance of carbonic
anhydrase in algal calcium precipitations and the relationship between algal
calcium precipitation and biomineralization of carbonate precipitation are
discussed.
Keywords: calcium precipitation, carbonic anhydrase, Chlamydomonas
reinhardtii, net photosynthetic O2 evolution rate.
1 Introduction
The biogeochemical cycle, which regulates all the biochemical reactions, is the
important \“driving force” of the geo-environment. The carbon cycle is one of the
Keywords
calcium precipitation, carbonic anhydrase, Chlamydomonas
reinhardtii, net photosynthetic O2 evolution rate.
Related Book
Other papers in this volume
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