Dynamics of cavitation in a Douglas-fir tree-ring: transition-wood, the lord of the ring?
Autor: | Anne-Sophie Sergent, María Elena Fernández, Guillermina Dalla-Salda, Alejandro Martinez-Meier, Philippe Rozenberg, Eric Badel |
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Přispěvatelé: | Unité de recherche Amélioration, Génétique et Physiologie Forestières (UAGPF), Institut National de la Recherche Agronomique (INRA), Laboratoire d'océanographie biologique de Banyuls (LOBB), Centre National de la Recherche Scientifique (CNRS)-Institut national des sciences de l'Univers (INSU - CNRS)-Université Pierre et Marie Curie - Paris 6 (UPMC)-Observatoire océanologique de Banyuls (OOB), Université Pierre et Marie Curie - Paris 6 (UPMC)-Centre National de la Recherche Scientifique (CNRS)-Centre National de la Recherche Scientifique (CNRS), Laboratoire de Physique et Physiologie Intégratives de l'Arbre Fruitier et Forestier (PIAF), Institut National de la Recherche Agronomique (INRA)-Université Blaise Pascal - Clermont-Ferrand 2 (UBP), Unité de recherche Amélioration, Génétique et Physiologie Forestières, Unité de recherche Amélioration, Génétique et Physiologie Forestières (AGPF), Observatoire océanologique de Banyuls (OOB), Université Pierre et Marie Curie - Paris 6 (UPMC)-Centre National de la Recherche Scientifique (CNRS)-Université Pierre et Marie Curie - Paris 6 (UPMC)-Centre National de la Recherche Scientifique (CNRS)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS), INTA-Programa Nacional-Forestales (PNFOR-1104073), CONICET, PitBulles project (ANR no. 2010 Blanc 171001) |
Jazyk: | angličtina |
Rok vydání: | 2014 |
Předmět: |
0106 biological sciences
Vulnerability Ring (chemistry) 010603 evolutionary biology 01 natural sciences embolism Abeto de Douglas earlywood Xylem conductivity loss annual ring Dendrochronology [SDV.BV]Life Sciences [q-bio]/Vegetal Biology Composite material Xilema Douglas fir Pseudotsuga Menziesii Chemistry Dynamics (mechanics) Water stress Mechanics 15. Life on land wood density Wood Madera Tension (geology) Cavitation latewood Abies Vulnerabilidad Densidad de la Madera 010606 plant biology & botany |
Zdroj: | Journal of Plant Hydraulics Journal of Plant Hydraulics, INRA Editions, 2014, 1, pp.e0005 Journal of Plant Hydraulics, 2014, 1, pp.e0005 Journal of Plant Hydraulics, INRA Science and Impact, 2014, 1, pp.e0005 Journal of Plant Hydraulics 1 (Noviembre 2014) INTA Digital (INTA) Instituto Nacional de Tecnología Agropecuaria instacron:INTA |
ISSN: | 2268-4565 2426-413X |
Popis: | The objective of this work wa s to investigate the dynamics of embolism formation within a Douglas fir tree ring . Four resistant and four vulnerable 10 year old trees were selected among 50 trees, based on their P 50 . Stem s amples , taken next to those used to obtain the vulnerability to cavitation curves, were collected and submitted to increasing positive pressures, in order to simulate increasing tension caused by water stress in the xylem . Then the conductive surface of the samples was stained and s canned and the images were analyzed. X ray microdensity profiles were obtained on the same samples. The microdensity profiles of the 2011 ring were analyzed in three parts, earlywood, transition w ood and latewood. The dynamics of embolism propagation was observed separately in these three parts. O ur results showed that the initiation and the propagation of the cavitation follow a discrete trend, with at least two successive initiation events: first cavitation initiate s and propagate s rapidly in the latewood . Then, a second cavitation event begin s and spread s in the earlywood and eventually propagates to the transition wood, which remains the last conductive part in the ring before full embolism. W e observed that resistant to cavitation trees showed lower transition wood density than vulnerable to cavitation trees. Estación Experimental Agropecuaria Bariloche Fil: Dalla Salda, Guillermina. Instituto Nacional de Tecnología Agropecuaria (INTA). Estación Experimental Agropecuaria Bariloche. Área de Recursos Forestales. Grupo de Ecología Forestal; Argentina Fil: Fernandez, Maria Elena. Instituto Nacional de Tecnología Agropecuaria (INTA). Estación Experimental Agropecuaria Balcarce. Agencia de Extensión Rural Tandil. Consejo Nacional de Investigaciones Cientificas y Técnicas; Argentina Fil: Sergent, Anne Sophie. Instituto Nacional de Tecnología Agropecuaria (INTA). Estación Experimental Agropecuaria Bariloche. Consejo Nacional de Investigaciones Cientificas y Tecnicas. Instituto de Investigaciones Forestales y Agropecuarias Bariloche; Argentina Fil: Rozenberg, Philippe. INRA. Biologie intégrée pour la valorisation de la diversité des arbres et de la forêt; Francia Fil: Badel, Eric. INRA. Biologie intégrée pour la valorisation de la diversité des arbres et de la forêt; Francia Fil: Martinez Meier, Alejandro. Instituto Nacional de Tecnología Agropecuaria (INTA). Estación Experimental Agropecuaria Bariloche. Área de Recursos Forestales. Grupo de Ecología Forestal; Argentina |
Databáze: | OpenAIRE |
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