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Artículo

Fire damage to cambium affects localized xylem anatomy and hydraulics: the case of Nothofagus pumilio in Patagonia

Mundo, Ignacio AlbertoIcon ; Gonzalez, Carina VeronicaIcon ; Stoffel, Markus; Ballesteros Cánovas, Juan A.; Villalba, RicardoIcon
Fecha de publicación: 12/2019
Editorial: Botanical Society of America
Revista: American Journal of Botany
ISSN: 0002-9122
Idioma: Inglés
Tipo de recurso: Artículo publicado
Clasificación temática:
Ciencias de las Plantas, Botánica

Resumen

Fire scars on trees are created by excessive heat from a fire that kills the vascular cambium. Although, fires are one of the most important forest disturbances in Patagonia, the effects of fire on tree physiology and wood anatomy are still unknown. In this study, we hypothesized that abnormal functioning of the cambium after a fire will induce anatomical changes in the wood. We also assumed that these anatomical changes would affect xylem safety transport. METHODS: We quantified wood anatomical traits in Nothofagus pumilio, the dominant subalpine tree species of Patagonia, using two approaches: time and distance. In the first, anatomical changes in tree rings were compared before, during, and after fire occurrence. In the second, the spatial extent of these changes was evaluated with respect to the wound by measuring anatomical traits in sampling bands in two directions (0° and 45°) with respect to the onset of healing. RESULTS: Reductions in lumen diameter and vessel number were the most conspicuous changes associated with fire damage and observed in the fire ring and subsequent post-fire rings. In addition, the fire ring had more rays than in control rings. In terms of distance, anatomical changes were only restricted to short distances from the wound. CONCLUSIONS: Post-fire changes in wood anatomical traits were confined close to the wound margins. These changes might be associated with a defense strategy related to the compartmentalization of the wound and safety of water transport.
Palabras clave: FIRE SCARS , NOTHOFAGACEAE , NOTHOFAGUS PUMILIO , NUMBER OF RAYS , QUANTITATIVE WOOD ANATOMY , SOUTHERN BEECH FOREST , VESSEL LUMEN DIAMETER , VESSEL NUMBER
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info:eu-repo/semantics/restrictedAccess Excepto donde se diga explícitamente, este item se publica bajo la siguiente descripción: Creative Commons Attribution-NonCommercial-ShareAlike 2.5 Unported (CC BY-NC-SA 2.5)
Identificadores
URI: http://hdl.handle.net/11336/104884
URL: https://onlinelibrary.wiley.com/doi/abs/10.1002/ajb2.1395
DOI: http://dx.doi.org/10.1002/ajb2.1395
Colecciones
Articulos(IANIGLA)
Articulos de INST. ARG. DE NIVOLOGIA, GLACIOLOGIA Y CS. AMBIENT
Articulos(IBAM)
Articulos de INST.DE BIOLOGIA AGRICOLA DE MENDOZA
Citación
Mundo, Ignacio Alberto; Gonzalez, Carina Veronica; Stoffel, Markus; Ballesteros Cánovas, Juan A.; Villalba, Ricardo; Fire damage to cambium affects localized xylem anatomy and hydraulics: the case of Nothofagus pumilio in Patagonia; Botanical Society of America; American Journal of Botany; 106; 12; 12-2019; 1-9
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