Niveles de fructificación en "Crataegus monogyna" Jacq., "Prunus mahaleb" L. y "Prunus spinosa" L. ("Rosaceae")
- Guitián Rivera, Javier
- Sánchez Fernández, José María
- Guitián Rivera, Pablo
ISSN: 0211-1322
Year of publication: 1992
Volume: 50
Issue: 2
Pages: 239-245
Type: Article
More publications in: Anales del Jardín Botánico de Madrid
Abstract
We determined fruit/flower ratio in populations of Crataegus monogyna, Prunus mahaleb and Prunus spinosa (Rosaceae) in the northwest Iberian Península. All three species showed low ratios (< 0.3) as a result of fecundity reductions which were both intrinsic and extrinsic in origin. Levels of flower and fruit loss varied between individuals and between species, and were independent of the length of the phenological periods. In Crataegus monogyna and Prunus spinosa the most important reductions occurred at the beginning of fruit development, whilst in Prunus mahaleb they were recorded during the flowering period. In all three species, the intrinsic mechanism which regulate fruit/flower ratio act at all stages of the reproductive cycle, although with different intensity.