Enzymatic consumption of carbonyl sulfide (COS) by marine algae

被引:32
作者
Blezinger, S
Wilhelm, C
Kesselmeier, J
机构
[1] Max Planck Inst Chem, Biogeochem Dept, D-55020 Mainz, Germany
[2] Univ Leipzig, Inst Bot, D-04103 Leipzig, Germany
关键词
Amphidinium klebsii (Dinophyceae); atmosphere; CA; carbonic anhydrase; carbonyl sulfide; COS; Mantoniella squamata (Prasinophyceae); marine algae; Prymnesium parvum (Prymnesiophyceae); reduced sulfur compounds; trace gases;
D O I
10.1023/A:1006134213995
中图分类号
X [环境科学、安全科学];
学科分类号
08 ; 0830 ;
摘要
We show that the marine algae Mantoniella squamata, Prymnesium parvum, and Amphidinium klebsii take up carbonyl sulfide (COS) from their surrounding medium. Inhibitor studies confirm that this COS uptake is catalyzed by the enzyme carbonic anhydrase, which was not detectable with conventional methods. As shown for M. squamata, the COS uptake can be dependent on the growth conditions. Furthermore, COS uptake shows a clear positive correlation with the COS concentration in the growth medium. The value of K-1/2 for the COS uptake was estimated to be around 222 mol/m(3). The COS consumption by the marine algae species investigated was estimated to be negligible compared to the photoproduction and hydrolysis of COS in seawater.
引用
收藏
页码:185 / 197
页数:13
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