CarteniDeslauriersRossiEtAl2018

Référence

Cartenì, F., Deslauriers, A., Rossi, S., Morin, H., De Micco, V., Mazzoleni, S. and Giannino, F. (2018) The physiological mechanisms behind the earlywood-to-latewood transition: A process-based modeling approach. Frontiers in Plant Science, 9. (Scopus )

Résumé

In extratropical ecosystems, the growth of trees is cyclic, producing tree rings composed of large-lumen and thin-walled cells (earlywood) alternating with narrow-lumen and thick-walled cells (latewood). So far, the physiology behind wood formation processes and the associated kinetics has rarely been considered to explain this pattern. We developed a process-based mechanistic model that simulates the development of conifer tracheids, explicitly considering the processes of cell enlargement and the deposition and lignification of cell walls. The model assumes that (1) wall deposition gradually slows down cell enlargement and (2) the deposition of cellulose and lignin is regulated by the availability of soluble sugars. The model reliably reproduces the anatomical traits and kinetics of the tracheids of four conifer species. At the beginning of the growing season, low sugar availability in the cambium results in slow wall deposition that allows for a longer enlargement time; thus, large cells with thin walls (i.e., earlywood) are produced. In late summer and early autumn, high sugar availability produces narrower cells having thick cell walls (i.e., latewood). This modeling framework provides a mechanistic link between plant ecophysiology and wood phenology and significantly contributes to understanding the role of sugar availability during xylogenesis. © 2018 Cartenì, Deslauriers, Rossi, Morin, De Micco, Mazzoleni and Giannino.

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@ARTICLE { CarteniDeslauriersRossiEtAl2018,
    AUTHOR = { Cartenì, F. and Deslauriers, A. and Rossi, S. and Morin, H. and De Micco, V. and Mazzoleni, S. and Giannino, F. },
    TITLE = { The physiological mechanisms behind the earlywood-to-latewood transition: A process-based modeling approach },
    JOURNAL = { Frontiers in Plant Science },
    YEAR = { 2018 },
    VOLUME = { 9 },
    NOTE = { cited By 0 },
    ABSTRACT = { In extratropical ecosystems, the growth of trees is cyclic, producing tree rings composed of large-lumen and thin-walled cells (earlywood) alternating with narrow-lumen and thick-walled cells (latewood). So far, the physiology behind wood formation processes and the associated kinetics has rarely been considered to explain this pattern. We developed a process-based mechanistic model that simulates the development of conifer tracheids, explicitly considering the processes of cell enlargement and the deposition and lignification of cell walls. The model assumes that (1) wall deposition gradually slows down cell enlargement and (2) the deposition of cellulose and lignin is regulated by the availability of soluble sugars. The model reliably reproduces the anatomical traits and kinetics of the tracheids of four conifer species. At the beginning of the growing season, low sugar availability in the cambium results in slow wall deposition that allows for a longer enlargement time; thus, large cells with thin walls (i.e., earlywood) are produced. In late summer and early autumn, high sugar availability produces narrower cells having thick cell walls (i.e., latewood). This modeling framework provides a mechanistic link between plant ecophysiology and wood phenology and significantly contributes to understanding the role of sugar availability during xylogenesis. © 2018 Cartenì, Deslauriers, Rossi, Morin, De Micco, Mazzoleni and Giannino. },
    AFFILIATION = { Department of Agricultural Sciences, University of Naples Federico II, Portici, Italy; Département des Sciences Fondamentales, Université du Québec à Chicoutimi, Chicoutimi, QC, Canada; Key Laboratory of Vegetation Restoration and Management of Degraded Ecosystems, Guangdong Provincial Key Laboratory of Applied Botany, Chinese Academy of Sciences, Guangzhou, China },
    ART_NUMBER = { 1053 },
    AUTHOR_KEYWORDS = { Carbon allocation; Cell enlargement; Cell-wall thickening; Sugar availability; Tree ring; Wood anatomy; Xylogenesis },
    DOCUMENT_TYPE = { Article },
    DOI = { 10.3389/fpls.2018.01053 },
    SOURCE = { Scopus },
    URL = { https://www.scopus.com/inward/record.uri?eid=2-s2.0-85050810095&doi=10.3389%2ffpls.2018.01053&partnerID=40&md5=83949714f821c77d07a638ea40fd9a16 },
}

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