La Tour du Valat

Institut de recherche pour la conservation des zones humides méditerranéennes

Titre :	The occurrence of vertical resin canals in Keteleeria, with reference to its systematic position in Pinaceae
Auteurs :	Jinxing Lin, Auteur ; Eryuan Liang, Auteur ; Aljos Farjon, Auteur
Type de document :	Article
Dans :	Botanical Journal of the Linnean Society (134(4) 2000-12-01)
Article en page(s) :	567-574
Résumé :	The variation in the number of resin canals in the secondary xylem of Keteleeria fortunei (A. Murray bis) Carrière is determined. At all levels from base to top of a tree, resin canals are absent rearer the pith, but they (sporadically) appear after a certain cambial age. In addition, the occurrence of resin canals in seven named species of Keteleeria was surveyed. It was confirmed that normal vertical resin canals do occur in the mature parts of secondary xylem, but that they may be absent in the juvenile parts of secondary xylem of stems, as well as in branches and in seedlings or saplings. Earlier investigations reporting the absence of resin canals altogether in this genus may have been misled by the use of younger (immature) specimens instead of mature stems of trees. The distribution pattern of resin canals found in Keteleeria is systematically significant because it supports a new system of classification of Pinaceae, in which Keteleeria is believed to have a close relationship with Nothotsuga.
En ligne :	https://doi.org/10.1111/j.1095-8339.2000.tb00552.x

Lundi , mardi et jeudi de 9h à 12h et de 13h à 17h00 : ouverture au public ...