TAILIEUCHUNG - Báo cáo khao học: "Rapid seedling obtaining from European ash species Fraxinus excelsior (L.) and Fraxinus angustifolia (Vahl.)"

Tuyển tập các báo cáo nghiên cứu về lâm nghiệp được đăng trên tạp chí lâm nghiệp quốc tế đề tài: Rapid seedling obtaining from European ash species Fraxinus excelsior (L.) and Fraxinus angustifolia (Vahl.). | Ann. For. Sci. 59 2002 219-224 INRA EDP Sciences 2002 DOI forest 2002009 219 Note Rapid seedling obtaining from European ash species Fraxinus excelsior L. and Fraxinus angustifolia Vahl. Christian Raquina Bernard Jung-Mullera Jean Dufourb and Nathalie Frascaria-Lacostea a ENGREF UPRESA CNRS 8079 Laboratoire Écologie Systématique et Évolution Bât. 362 Université Paris-Sud 91405 Orsay Cedex France b INRA Unité Amélioration Génétique et Physiologie Forestières BP 20169 Ardon 45160 Olivet France Received 20 April 2001 accepted 15 October 2001 Abstract - Three different dissection treatments were applied to mature seeds of two European ash species Fraxinus excelsior L. and Fraxinus angustifolia Vahl. in order to compare their relative efficiency for germination and further development. The in vitro embryo culture appeared to be the most efficient for both species nearly 90 of viable plants . The two species expressed differences in germination rate without embryo culture. Fraxinus excelsior Fraxinus angustifolia dormancy embryo culture germination Résumé - Une méthode d obtention rapide de jeunes plants pour les frênes européens Fraxinus excelsior L. et Fraxinus angustifolia Vahl. . L efficacité de trois protocoles de dissection a été testée pour la germination de graines et le développement de deux espèces de frênes européens Fraxinus excelsior L. etFraxinus angustifolia Vahl. . La culture in vitro d embryons s est avérée la plus efficace pour les deux espèces près de 90 de plantes viables . En l absence de culture d embryons les taux de germination diffèrent pour les deux espèces. Fraxinus excelsior Fraxinus angustifolia dormance culture d embryons germination 1. INTRODUCTION In the forests of west Europe and especially in France the genus Fraxinus is essentially represented by two species . Fraxinus excelsior L. common ash and Fraxinus angustifolia Vahl. narrow leaved ash . In the north part of France the common ash grows up to 30 m and is considered as a

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