TAILIEUCHUNG - Báo cáo khao học: "Clonal variation of wood density record of cambium reaction to water deficit in Picea abies (L.) Karst"

Tuyển tập các báo cáo nghiên cứu về lâm nghiệp được đăng trên tạp chí lâm nghiệp quốc tế đề tài: Clonal variation of wood density record of cambium reaction to water deficit in Picea abies (L.) Karst. | Ann. For. Sci. 59 2002 533-540 INRA EDP Sciences 2002 DOI forest 2002038 533 Original article Clonal variation of wood density record of cambium reaction to water deficit in Picea abies L. Karst Philippe Rozenberg Julien Van Loo Bjorn Hannrup and Michael Grabner INRA Orléans Unité d Amélioration Génétique et Physiologie Forestières BP 20619 Ardon 45166 Olivet Cedex France Received 16 August 2001 accepted 6 February 2002 Abstract - Water deficit during the growing season affects cambium activity a water deficit during the first part of the growing season results in the formation of latewood-like cells. If this event is followed by a return to favourable water conditions a microdensity profile drawn radially through the ring will reveal a density peak in the earlywood. This study proves that some characteristics of the peak formed in the earlywood of the ring 1993 in the trees of a Swedish Norway spruce clonal test 2 sites 20 clones are genetically controlled. The peak position in the ring is the most genetically controlled peak characteristic. The observed variability for the peak position in the ring can be related with an hypothesis concerning the presence of some degree of genetic control of the kinetic of the cambium reaction to environmental variation. genetics microdensity water deficit Norway spruce Résumé - Variabilité clonale de la reaction du cambium à un deficit en eau chez Picea abies L. Karst. Un deficit en eau en cours de saison de végétation affecte l activité du cambium si le déficit se produit en premiere partie de saison de végétation on observe dans le bois initial du cerneformé cette année-làdes cellules de type bois final . Siledéficiteneau est suivid un retour à des conditions favorables unprofilmicro-densitométrique tracé dans ce cerne révèle alors un pic de densité dans le bois initial. Cette étude met en évidence l existence d un contrôle géné-tique des caractères de ce pic de densité pour le cerne formé en 1993 chez les arbres d un

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