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Modeled tracheidograms disclose drought influence on Pinus sylvestris tree-rings structure from siberian forest-steppe

Popkova Margarita I., Vaganov Eugene A., Shishov Vladimir V., Babushkina Elena A., Rossi Sergio, Fonti Marina V. et Fonti Patrick. (2018). Modeled tracheidograms disclose drought influence on Pinus sylvestris tree-rings structure from siberian forest-steppe. Frontiers in Plant Science, 9, e1144.

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Wood formation allows trees to adjust in a changing climate. Understanding what determine its adjustment is crucial to evaluate impacts of climatic changes on trees and forests growth. Despite efforts to characterize wood formation, little is known on its impact on the xylem cellular structure. In this study we apply the VaganovShashkin model to generate synthetic tracheidograms and verify its use to investigate the formation of intra-annual density fluctuations (IADF), one of the most frequent climate tree-ring markers in drought-exposed sites. Results indicate that the model can produce realistic tracheidograms, except for narrow rings (<1 mm), when cambial activity stops due to an excess of drought or a lack of growth vigor. These observations suggest that IADFs are caused by a release of drought limitation to cells formation in the first half of the growing season, but that narrow rings are indicators of an even more extreme and persistent water stress. Taking the example of IADFs formation, this study demonstrated that the Vaganov-Shashkin model is a useful tool to study the climatic impact on tree-ring structures. The ability to produce synthetic tracheidogram represents an unavoidable step to link climate to tree growth and xylem functioning under future scenarios.

Type de document:Article publié dans une revue avec comité d'évaluation
Version évaluée par les pairs:Oui
Date:6 Août 2018
Identifiant unique:10.3389/fpls.2018.01144
Sujets:Sciences naturelles et génie > Sciences appliquées > Foresterie et sciences du bois
Sciences naturelles et génie > Sciences naturelles > Biologie et autres sciences connexes
Département, module, service et unité de recherche:Unités de recherche > Centre de recherche sur la Boréalie (CREB)
Départements et modules > Département des sciences fondamentales
Mots-clés:cambial activity, cell size, process-based Vaganov-Shashkin model, South Siberia, tracheid, tracheidogram, VS-oscilloscope, Pinus sylvestris
Déposé le:02 juin 2023 12:43
Dernière modification:02 juin 2023 12:43
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