ENZYMATIC PATHWAYS FOR THE CONSUMPTION OF CARBONYL SULFIDE (COS) BY HIGHER-PLANTS

被引：90

作者：

PROTOSCHILL-KREBS, G ^{[1
]}

KESSELMEIER, J ^{[1
]}

机构：

[1] MAX PLANCK INST CHEM, DEPT BIOGEOCHEM, POB 3060, W-6500 MAINZ, GERMANY

来源：

BOTANICA ACTA | 1992年 / 105卷 / 03期

关键词：

ATMOSPHERIC TRACE GASES; CARBONIC ANHYDRASE; CA; CARBONYL SULFIDE; COS; COS METABOLISM OF HIGHER PLANTS; PHOSPHOENOLPYRUVATE CARBOXYLASE; PEP-CO; RIBULOSE-1,5-BISPHOSPHATE CARBOXYLASE; RUBISCO; VEGETATION;

D O I：

10.1111/j.1438-8677.1992.tb00288.x

中图分类号：

Q94 [植物学];

学科分类号：

071001 ;

摘要：

Carbonyl sulphide (COS) is an important trace gas of the atmosphere. Considerable uncertainties remain concerning the global sinks of COS. Vegetation is believed to be an unquantified sink in the global cycle of COS. We investigated whether there is an enzymological background for the consumption of COS by higher plants in analogy to CO2. Photometric measurements demonstrated that all enzymes involved in CO2 assimilation by higher plants can also metabolise COS. The key enzyme for COS metabolism in higher plants is carbonic anhydrase, an enzyme which probably directly splits COS into CO2 and H2S. Such a pathway would explain the observed deposition of COS to vegetation.

引用

页码：206 / 212

页数：7

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