INMIBO ( EX - PROPLAME)   14614
INSTITUTO DE MICOLOGIA Y BOTANICA
Unidad Ejecutora - UE
artículos
Título:
Germination of stored and scarified seeds of Passiflora caerulea L.
Autor/es:
MENDIONDO, G. M. & AMELA GARCÍA, M. T.
Revista:
Plant Biosystems
Editorial:
Taylor & Francis
Referencias:
Lugar: Abingdon; Año: 2009 vol. 143 p. 369 - 376
ISSN:
1126-3504
Resumen:
This work evaluates the influence of storage and scarification in the germination P. caerulea L., with the aim to acquire the necessary knowledge to cultivate this economically important species. Seeds stored one month under different conditions (no storage, fermentation and desiccation) were submitted to various pre-treatments (aril removal, mechanical and chemical scarification and combinations of these). Emergence was recorded periodically for 11 months in a greenhouse. Germination initial time, germination percentage and germination speed were obtained. Histochemical tests were applied to seeds maintained at the three storage conditions, to see possible changes in the integument and reserving tissue. Viability maintained at least for the storage period tested, as germination occurred after that time. Because the seeds stored under desiccation germinated, the species is orthodox. Chemical scarification prevented germination in most cases. Germination levels were low, nevertheless, the ones from stored seeds (fermented and desiccated) were higher than from fresh ones. Fermented seeds (which exhibited no reserve tissue and minor proportion of lignin in the integument), and devoid of the aril, germinated earlier, faster and in greater quantity. Fungal attack would reduce seed coat water impermeability by degradation of certain hydrophobic substances. The type(s) of dormancy of this species are discussed.