Barthélémy Daniel, Puntieri Javier, Brion Cécilia, Raffaele Estela, Marino Jorgelina, Martinez Pascal. 1999. Morfologia de las unidades estructurales y modo de desarrollo basico de especies patagonicas de Nothofagus (Fagaceae). Boletín de la Sociedad Argentina de Botánica, 34 (1-2) : 29-38.
Autre titre : Morphologie des unités structurales et mode de développement de base d'espèces de Nothofagus (Fagaceae) de Patagonie
Résumé : Morphological and architectural features of Nothofagus antarctica (G. Forster) Oersted, N. dombeyi (Mirb.) Blume, N. pumilio (Poepp. et Endl.) Krasser, N. obliqua (Mirb.) Blume and N. nervosa (Phil.) Dim. et Mil. were studied in their natural habitat. Except for the two leaves following the cotyledons, which may be opposite, leaves are normally alternate and distichously arranged along the stem, although tristichous arrangement is not rare in all species but N. pumilio. The basic structure of a leaf includes a petiolated blade and two stipules; the degree of development of each of these parts depends on the leaf position on the plant. Compared to known related species from the northern hemisphere, buds in Nothofagus spp. have low numbers of cataphylls; this kind of leaf may be absent in terminal buds. A shoot elongated during one growing season may or may not branch in that season, which depends on shoot vigour and shoot-apex persistence. The apex of an annual shoot may persist after shoot elongation but spontaneous apex death is relatively common. Flowers are preformed in the winter bud together with their bearing shoot. Morphological and architectural features of the species of Nothofagus studied here are more similar to those of studied species of Fagus, Alnus and Carpinus than to those of Quercus.
Mots-clés Agrovoc : Nothofagus, port de la plante, anatomie végétale, ramification
Mots-clés géographiques Agrovoc : Argentine
Mots-clés complémentaires : Architecture végétale
Classification Agris : F50 - Anatomie et morphologie des plantes
F62 - Physiologie végétale - Croissance et développement
Auteurs et affiliations
-
Barthélémy Daniel, CIRAD-AMIS-AMAP (FRA)
ORCID: 0000-0003-3187-2517
- Puntieri Javier
- Brion Cécilia
- Raffaele Estela
- Marino Jorgelina
- Martinez Pascal, Universidad Nacional del Comahue (ARG)
Autres liens de la publication
- Document en bibliothèque
- Localisation du document : CD_BR8192 [(Bibliothèque de Lavalette)]
Source : Cirad - Agritrop (https://agritrop.cirad.fr/391928/)
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