Fire damage to cambium affects localized xylem anatomy and hydraulics: the case of Nothofagus pumilio in Patagonia
| Autor: | Ricardo Villalba, Ignacio A. Mundo, Juan Antonio Ballesteros-Cánovas, Markus Stoffel, Carina Verónica González |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2019 |
| Předmět: |
0106 biological sciences
Plant Science Biology 010603 evolutionary biology 01 natural sciences Fires VESSEL LUMEN DIAMETER Ciencias Biológicas VESSEL NUMBER Xylem Genetics Vascular cambium ddc:550 Cambium skin and connective tissue diseases NOTHOFAGACEAE Ecology Evolution Behavior and Systematics Ciencias de las Plantas Botánica FIRE SCARS ddc:333.7-333.9 Water transport NOTHOFAGUS PUMILIO Anatomy 15. Life on land Compartmentalization (fire protection) biology.organism_classification Wood QUANTITATIVE WOOD ANATOMY NUMBER OF RAYS Fagales sense organs Spatial extent Tree species Nothofagus pumilio CIENCIAS NATURALES Y EXACTAS 010606 plant biology & botany SOUTHERN BEECH FOREST |
| Zdroj: | American Journal of Botany, Vol. 106, No 12 (2019) pp. 1536-1544 |
| ISSN: | 1537-2197 |
| Popis: | 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. Fil: Mundo, Ignacio Alberto. Universidad Nacional de Cuyo. Facultad de Ciencias Exactas y Naturales; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Mendoza. Instituto Argentino de Nivología, Glaciología y Ciencias Ambientales. Provincia de Mendoza. Instituto Argentino de Nivología, Glaciología y Ciencias Ambientales. Universidad Nacional de Cuyo. Instituto Argentino de Nivología, Glaciología y Ciencias Ambientales; Argentina Fil: Gonzalez, Carina Veronica. Universidad Nacional de Cuyo. Facultad de Ciencias Exactas y Naturales; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Mendoza. Instituto de Biología Agrícola de Mendoza. Universidad Nacional de Cuyo. Facultad de Ciencias Agrarias. Instituto de Biología Agrícola de Mendoza; Argentina Fil: Stoffel, Markus. Universidad de Ginebra; Suiza Fil: Ballesteros Cánovas, Juan A.. Universidad de Ginebra; Suiza Fil: Villalba, Ricardo. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Mendoza. Instituto Argentino de Nivología, Glaciología y Ciencias Ambientales. Provincia de Mendoza. Instituto Argentino de Nivología, Glaciología y Ciencias Ambientales. Universidad Nacional de Cuyo. Instituto Argentino de Nivología, Glaciología y Ciencias Ambientales; Argentina |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|
Plný text