Formation and mineralization of organic sulfur in forest soils. Strickland, T. C. Biogeochemistry, 1984.
Formation and mineralization of organic sulfur in forest soils. [pdf]Paper  abstract   bibtex   
The incorporation of sulfur from inorganic sulfate into organic matter was examined using 35S for O1, O2 and A-horizon samples from two hardwood forests located at Coweeta. This temperature-dependent transformation was stimulated by increased availability of sulfate or energy and the process was inhibited by sodium azide, erythromycin and candicidin. Thus, bacteria and fungi mediate sulfur incorporation via the formation of the covalent linkages. Evidence indicates that the sulfur of this fraction is subject to mineralization after depolymerization of the carbon matrix and methods are given for the direct and indirect assessment of potential turnover rates. The availability of sulfate from mineralization appears to depend upon the rate of incorporation of sulfur into organic matter. Substantially higher levels of extractable sulfate were detected when turnover of the isolated organosulfur fraction was assayed for in the presence of axide, an inhibitor of sulfate incorporation. However, the reverse was true when turnover was monitored in the presence of glucose and succinate which stimulate sulfate incorporation.

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