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Effects of dry treatment of seeds and fruits on the germination of sorbus aria and sorbus aucuparia



Effects of dry treatment of seeds and fruits on the germination of sorbus aria and sorbus aucuparia



Bulletin de la Classe des Sciences Academie Royale de Belgique 5E Serie 65(7-8): 361-374



Seeds and fruits of S. aria and S. aucuparia were put in dry storage at laboratory temperature (.+-. 20.degree.) during 0-9 mo. The germinative results depend on the year, but the experiments corroborate that the embryo dormancy is associated with a dormancy imposed by the spermoderm. The 1st type prevails in S. aucuparia and the 2nd type in S. aria. Dry storage increases the germination of isolated embryos but intensifies the dormancy imposed by the spermoderm. The interactions between year, maturation phenology and seed storage inside the fruit of S. aria are discussed. The germination ecophysiology of these species is quite different.

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Accession: 005301210

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