tailieunhanh - Báo cáo lâm nghiệp: "Argan (Argania spinosa (L.) Skeels) seed germination under nursery conditions: Effect of cold storage, gibberellic acid and mother-tree genotype"

Tuyển tập các báo cáo nghiên cứu về sinh học được đăng trên tạp chí lâm nghiệp đề tài: Argan (Argania spinosa (L.) Skeels) seed germination under nursery conditions: Effect of cold storage, gibberellic acid and mother-tree genotype. | Ann. For. Sci. 61 2004 191-194 191 INRA EDP Sciences 2004 DOI forest 2004011 Note Argan Argania spinosa L. Skeels seed germination under nursery conditions Effect of cold storage gibberellic acid and mother-tree genotype Mohamed Alouani Fouzia Bani-Aameur Laboratoire de Recherche sur la Variabilité Génétique Université Ibn Zohr Faculté des sciences Département de Biologie BP 28 S- 80 000 Agadir Morocco Received 6 February 2002 accepted 3 January 2003 Abstract - The aim of this study is to assess argan Argania spinosa seed germination of ten argan mother-trees after four different cold storage durations with or without gibberellic acid GA treatment for the purpose of establishing a simple germination procedure adaptable to various nursery situations. The beginning of germination of argan seeds which were stored at room temperature in the absence of GA treatment was delayed for days in average in comparison with chilled and GA-treated seeds. Germination was as low as and seed deterioration as well as pre-emergence seedling dumping-off was important. In contrast either GA application or cold storage at 4 C for at least one month significantly led to a two-fold increase of germination attaining approximately 60 and a better control of dormancy. Indeed average germination was even higher when both treatments were combined mostly because GA combined to cold storage of the seeds for longer than one month periods decreased losses due to seed fungi contamination or to pre-emergence seedling dumping-off. Final germination percentage was enhanced by cold storage for the longest periods three months attaining values higher than depending on mother tree genotype. Argania spinosa reforestation dormancy germination gibberellic acid Résumé - Germination des semences d arganier Argania spinosa L. Skeels en pépinière effet du froid de l acide gibbérellique et du génotype du pied-mère. Cette étude porte sur les effets de quatre durées de conservation des .