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Abstract:

To know thoroughly the structure and function of the corona of Passiflora, the anatomy and ultrastructure of two species were analysed in relation to the emission of odour perceivable by humans: a scented one, P. caerulea L., and a scentless one, P. suberosa L. Both species exhibited secretory tissue, whose cells were characterised by dense cytoplasm, numerous mitochondria and vacuoles. Evidence of granulocrine secretion was detected. Nevertheless, there were differences concerning some cytological structures: P. suberosa lacked smooth endoplasmic reticulum (sER) and starch but had large and many lipidic globules, while P. caerulea had few dictyosomes, scarce lipidic content, a greater proportion of sER/rough endoplasmic reticulum (rER) and amyloplasts. The cellular features of P. caerulea correspond with those of fragrance tissues. The secretion appearance and quantity were also different between both species: P. caerulea exhibited sparse drops on the cuticle in contrast to P. suberosa, which secrets a wax-like material. If this is the final product of the secretory process or just a vehicle that contributes to the emission of volatile compounds, as occurs in certain osmophores, needs further confirmation with chemical analysis. Results are discussed in the context of the pollination syndromes of each species and their florivores. © 2007 Elsevier GmbH. All rights reserved.

Registro:

Documento: Artículo
Título:Ultrastructure of the corona of scented and scentless flowers of Passiflora spp. (Passifloraceae)
Autor:Amela García, M.T.; Galati, B.G.; Hoc, P.S.
Filiación:Depto. Biodiversidad y Biología Experimental, Facultad de Ciencias Exactas y Naturales, UBA, Buenos Aires, Argentina
Palabras clave:Osmophores; Passiflora; Scent guides; Submicroscopic structure; TEM; Wax; cell organelle; cultivar; cuticle; dicotyledon; lipid; pollination; ultrastructure; wax; Passiflora; Passiflora caerulea; Passiflora edulis; Passiflora suberosa; Passifloraceae
Año:2007
Volumen:202
Número:4
Página de inicio:302
Página de fin:315
DOI: http://dx.doi.org/10.1016/j.flora.2006.08.003
Título revista:Flora: Morphology, Distribution, Functional Ecology of Plants
Título revista abreviado:Flora Morphol. Distrib. Funct. Ecol. Plants.
ISSN:03672530
CODEN:FLRAB
Registro:https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_03672530_v202_n4_p302_AmelaGarcia

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Citas:

---------- APA ----------
Amela García, M.T., Galati, B.G. & Hoc, P.S. (2007) . Ultrastructure of the corona of scented and scentless flowers of Passiflora spp. (Passifloraceae). Flora: Morphology, Distribution, Functional Ecology of Plants, 202(4), 302-315.
http://dx.doi.org/10.1016/j.flora.2006.08.003
---------- CHICAGO ----------
Amela García, M.T., Galati, B.G., Hoc, P.S. "Ultrastructure of the corona of scented and scentless flowers of Passiflora spp. (Passifloraceae)" . Flora: Morphology, Distribution, Functional Ecology of Plants 202, no. 4 (2007) : 302-315.
http://dx.doi.org/10.1016/j.flora.2006.08.003
---------- MLA ----------
Amela García, M.T., Galati, B.G., Hoc, P.S. "Ultrastructure of the corona of scented and scentless flowers of Passiflora spp. (Passifloraceae)" . Flora: Morphology, Distribution, Functional Ecology of Plants, vol. 202, no. 4, 2007, pp. 302-315.
http://dx.doi.org/10.1016/j.flora.2006.08.003
---------- VANCOUVER ----------
Amela García, M.T., Galati, B.G., Hoc, P.S. Ultrastructure of the corona of scented and scentless flowers of Passiflora spp. (Passifloraceae). Flora Morphol. Distrib. Funct. Ecol. Plants. 2007;202(4):302-315.
http://dx.doi.org/10.1016/j.flora.2006.08.003