| Revista: | Maderas : ciencia y tecnología |
| Base de datos: | |
| Número de sistema: | 000534460 |
| ISSN: | 0718-221X |
| Autores: | Benítez, Valentina1 Franco, Jorge2 Camargo, Álvaro3 Raimonda, Pablo4 Mantero, Carlos5 Ibáñez, Claudia Marcela3 |
| Instituciones: | 1Universidad de la República de Uruguay Casa de la Universidad de Cerro Largo, Melo. Uruguay 2Universidad de la República de Uruguay Facultad de Agronomía Departamento de Biometría Estadística y Computación, Montevideo. Uruguay 3Universidad de la República de Uruguay Instituto Superior de Estudios Forestales Sede Tacuarembó, Tacuarembó. Uruguay 4Universidad de la República de Uruguay Facultad de Ingeniería Instituto de Ensayo de Materiales, Montevideo. Uruguay 5Universidad de la República de Uruguay Facultad de Agronomía Departamento Forestal, Montevideo. Uruguay |
| Año: | 2021 |
| Volumen: | 23 |
| País: | Chile |
| Idioma: | Inglés |
| Resumen en inglés | The biological decomposition of lignocellulosic materials caused by basidiomycetes plays an essential role in the carbon cycle. Brown rot fungi represent important agents in the biodegradation of wood products and standing coniferous trees in natural ecosystems. The initial moisture content of the wood is an important factor in the degradation process. In this work, the effects of initial moisture content of Eucalyptus grandis sapwood on decay by two brown rot fungi Gloeophyllum trabeum and Laetiporus sulphureus were studied over a 10-month period. The fungal activity was evaluated, through wood weight loss, moisture content, anatomical changes (scan electronic and fluorescence microscopy) and Fourier-transform infrared spectroscopy. Weight loss increased through the 10-month test for both fungi, Laetiporus sulphureus producing higher mass losses. Colonization of the wood by both fungi started below the fiber saturation range. It was observed that the initial moisture content of the wood influenced the rate of deterioration: the wet samples showed higher weight loss compared to the dry samples. Changes in the chemical composition and structure of cell walls were detected. The initial moisture content of the substrate affected the development of the fungi, slowing their growth. |
| Keyword: | Brown rot, Cell walls, Eucalyptus grandis, Fluorescence microscopy, Moisture content, Weight loss, Wood biodegradation. |
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