Record Display for the EPA National Library Catalog


Main Title Enzymatic Activities Related to the Decomposition of Coniferous Leaf Litter.
Author Spalding, Brian P. ;
CORP Author Corvallis Environmental Research Lab., OR.
Year Published 1976
Report Number EPA/600/J-77/133;
Stock Number PB-287 003
Additional Subjects Enzymes ; Decomposition ; Refuse ; Plant tissues ; Forestry ; Carbon dioxide ; Amylase ; Cellulase ; pH ; Carbonic anhydrase ; Potassium compounds ; Acetates ; Exposure ; Hexose ; Cellulose ; Hydrolysis ; Starches ; Sucrose ; Oregon ; Reprints ; Xylanase ; Leaves ; Xylan ; Conifers
Library Call Number Additional Info Location Last
NTIS  PB-287 003 Some EPA libraries have a fiche copy filed under the call number shown. 07/26/2022
Collation 9p
The rate of CO2 evolution at 23C and 75% moisture content for a diverse group of coniferous leaf litter samples from Oregon was measured. Significant correlations (1% level) were observed between the rate of CO2 evolution and the activity of amylase, cellulase, and xylanase (r=0.71, 0.58, and 0.44, respectively) in 0.05M potassium acetate pH 5.0 extracts of the litter. The amounts of extractable hexose, phenolics, and reducing substances were also correlated with the rate of CO2 evolution (r=0.74, 0.53, and 0.73 respectively). Peroxidase and invertase activities were not correlated with the rate of CO2 evolution. Litter extracts showed zero-order kinetics for the hydrolysis of carbozymethylcellulose, xylan, starch, and sucrose. All carbohydrase activities were destroyed by a 15 min exposure to a boiling water bath.