Is Carbonyl Sulfide a Precursor for Carbon Disulfide in Vegetation and Soil? Interconversion of Carbonyl Sulfide and Carbon Disulfide in Fresh Grain Tissues in Vitro

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• 作者：YongLin Ren
• 刊名：Journal of Agricultural and Food Chemistry
• 出版年：1999
• 出版时间：May 1999
• 年：1999
• 卷：47
• 期：5
• 页码：2141 - 2144
• 全文大小：195K
• 年卷期：v.47,no.5(May 1999)
• ISSN：1520-5118

文摘

The interconversion of carbonyl sulfide (COS) and carbon disulfide (CS₂) was studied in the rootsand shoots of barley and chickpeas. Ratios of conversion gases, K, 40 h after the addition of COS orCS₂ are recorded. The proportion of COS converted to each of CS₂, CO, and H₂S and the proportionof CS₂ converted to COS were greater in roots than in shoots. More COS was converted to CS₂ thanCS₂ to COS in roots and shoots of barley and chickpeas. The amount of COS converted to H₂S andCO was 8 times the amount converted to CS₂ in barley and 3-4 times the amount in chickpeas.Carbonyl sulfide may be a precursor for CS₂ in vegetation and soil, just as the reverse is true in theatmosphere. These two different results might form a cycle of COS and CS₂.Keywords: Fumigants; COS; CS₂; interconversion; sulfur cycle