Couplings in cell differentiation kinetics mitigate air temperature influence on conifer wood anatomy

Autor: Cyrille B. K. Rathgeber, Georg von Arx, Patrick Fonti, Henri E. Cuny, David Frank, Richard L. Peters
Přispěvatelé: Swiss Federal Institute for Forest Snow and Landscape Research (WSL), Institut National de l'Information Géographique et Forestière [IGN] (IGN), Laboratoire d'Etudes des Ressources Forêt-Bois (LERFoB), Institut National de la Recherche Agronomique (INRA)-AgroParisTech, University of Basel (Unibas), University of Arizona, Schweizerischer Nationalfonds zur Forderung der Wissenschaftlichen Forschung 150205-LOTFOR, 160077-CLIMWOOD, FPS COST Action STReESS FP1106, Swiss State Secretariat for Education, Research and Innovation SERI SBFI C14.0104, AgroParisTech-Institut National de la Recherche Agronomique (INRA), Swiss Federal Institute for Forest, Snow and Landscape Research WSL
Jazyk: angličtina
Rok vydání: 2019
Předmět:
Zdroj: Plant, Cell and Environment
Plant, Cell and Environment, Wiley, 2019, 42 (4), pp.1222-1232. ⟨10.1111/pce.13464⟩
ISSN: 0140-7791
1365-3040
DOI: 10.1111/pce.13464⟩
Popis: Conifer trees possess a typical anatomical tree-ring structure characterized by a transition from large and thin-walled earlywood tracheids to narrow and thick-walled latewood tracheids. However, little is known on how this characteristic structure is maintained across contrasting environmental conditions, due to its crucial role to ensure sap ascent and mechanical support. In this study, we monitored weekly wood cell formation for up to 7 years in two temperate conifer species (i.e., Picea abies (L.) Karst and Larix decidua Mill.) across an 8°C thermal gradient from 800 to 2,200 m a.s.l. in central Europe to investigate the impact of air temperature on rate and duration of wood cell formation. Results indicated that towards colder sites, forming tracheids compensate a decreased rate of differentiation (cell enlarging and wall thickening) by an extended duration, except for the last cells of the latewood in the wall-thickening phase. This compensation allows conifer trees to mitigate the influence of air temperature on the final tree-ring structure, with important implications for the functioning and resilience of the xylem to varying environmental conditions. The disappearing compensation in the thickening latewood cells might also explain the higher climatic sensitivity usually found in maximum latewood density.
Databáze: OpenAIRE
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