期刊
CANADIAN JOURNAL OF FOREST RESEARCH
卷 48, 期 6, 页码 709-720出版社
CANADIAN SCIENCE PUBLISHING
DOI: 10.1139/cjfr-2017-0309
关键词
basidiomycetes; extracellular enzymes; solid-state fermentation; litter quality; carbon-13 cross-polarization magic-angle spinning nuclear magnetic resonance
类别
资金
- Consejo Nacional de Investigaciones Cientificas y Tecnicas, Argentina [PIP 11220120100408]
- University of Buenos Aires (UBACyT) [20020120200085]
- Agencia Nacional [PICT 2015-1620]
Chemical changes in leaf input to forest soils have been reported to affect decay processes. In this work, litter mass loss and decomposition constants (k) during 200 days in solid-state fermentation of the native tree Celtis tala Gill. ex Planch. and the exotic one Ligustrum lucidum Ait. with three common litter saprotrophic basidiomycetes were compared. Alterations in litter quality were characterized by solid-state C-13 NMR spectroscopy, pH, soluble sugars, ammonium, proteins, and phenol content determination and were associated with extracellular lignocellulolytic enzyme production. Differences in substrate decomposition related to litter type were observed for Leratiomyces ceres, achieving a higher k in the exotic L. lucidum litter, which might be attributed to the induction of manganese peroxidase activity. Substrate preference for alkyl C and more degradation of lignified compounds were found in such substrates. Although no statistical differences in mass loss were observed for the rest of the fungi assayed, we detected changes in several of the parameters evaluated. This suggests that exotic invasions may alter ecosystem functioning by accelerating decomposition processes through an increased fungal ligninolytic activity.
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