Analysing branching pattern in plantations of young red oak trees (Quercus rubra L., Fagaceae)

Heuret Patrick, Guédon Yann, Guérard Natacha, Barthélémy Daniel. 2003. Analysing branching pattern in plantations of young red oak trees (Quercus rubra L., Fagaceae). Annals of Botany, 91 (4) : 479-492.

https://doi.org/10.1093/aob/mcg046

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Autre titre : Analyse de la ramification en plantations de jeunes chênes rouges (Quercus rubra L., Fagaceae)

Résumé : Branching patterns of the growth units of monocyclic or bicyclic annual shoots on the main axis of 5-year-old red oaks were studied in a plantation in south-western France. For each growth unit, the production of axillary structures associated with each node was described in the form of a sequence. For a given category of growth units, homogeneous zones (i.e. zones in which composition in terms of type of axillary production does not change substantially) were identified on such sequences using a dedicated statistical model called a hidden semi-Markov chain. For instance, on the first growth unit of bicyclic annual shoots, a zone with 1-year-delayed branches was found systematically below a zone with buds and one-cycle-delayed branches. Branching patterns shown by the growth unit of monocyclic annual shoots and on the second growth unit of bicyclic annual shoots were very similar. Branches with a 1-year delay in development tended to be polycyclic at the top of the growth unit and monocyclic lower down. The number of nodes shown by the branched zone of the growth unit of monocyclic annual shoots was stable, irrespective of the total number of nodes of the growth unit. In contrast, the second growth unit of bicyclic annual shoots exhibited a correlation between the number of nodes in the branching zone and the total number of nodes. The contribution made by this method to understanding plant functioning is discussed.

Mots-clés Agrovoc : Quercus rubra, ramification, croissance, méthode statistique, pousse, branche, noeud

Mots-clés géographiques Agrovoc : France

Classification Agris : U10 - Informatique, mathématiques et statistiques
F50 - Anatomie et morphologie des plantes
F62 - Physiologie végétale - Croissance et développement

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