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Abstract:

Background: The inflorescences of the genus Vigna Savi have extrafloral nectaries (EFNs) among the flowers whose origin is still unknown. The disposition, anatomy and morphology, as well as the ontogeny of the extrafloral nectaries (EFNs) associated with the inflorescences of Vigna adenantha (G.F.W. Meyer) Maréchal, Mascherpa & Stainier (Leguminosae, Papilionoideae, Phaseolae) were studied. Besides, the ultrastructure of the secretory stage was described. Results: The inflorescence, a raceme, bears a brief globose secondary axis in each node with 2 flowers and 5–7 EFNs, which develop in acropetal direction. Each EFN originates from the abscission of a flower bud that interrupts its development, resulting in an elevated EFN. This secretory structure is formed by a ring of epidermal and parenchymatic cells surrounding a group of elongated central cells. The nectary is irrigated by phloem and xylem. Four developmental stages proceed; each one relates to a different embryological stage of the flowers in each secondary axis. Conclusions: The first functional EFN of each secondary axis of the inflorescence reaches its maturity when both the pollen grains and the embryo sacs are completely developed and the flowers begin to open. The secretion is granulocrine. The following EFNs develop in the same way. © 2014, Ojeda et al.; licensee Springer.

Registro:

Documento: Artículo
Título:Ontogeny of the extrafloral nectaries of Vigna adenantha (Leguminosae, Phaseolae) and its relation with floral development
Autor:Ojeda, F.S.; Hoc, P.S.; Galati, B.G.; García, M.T.A.
Filiación:PROPLAME-PRHIDEB (CONICET); DBBE, FCEyN, UBA, Buenos Aires, Argentina
Cátedra de Botánica, FAUBA, UBA, Buenos Aires, Argentina
Palabras clave:Anatomy; Extrafloral nectaries; Inflorescences; Leguminosae; Morphology; Ontogeny; Ultrastructure; Vigna
Año:2014
Volumen:55
Número:1
DOI: http://dx.doi.org/10.1186/s40529-014-0074-2
Título revista:Botanical Studies
Título revista abreviado:Bot. Stud.
ISSN:1817406X
Registro:https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_1817406X_v55_n1_p_Ojeda

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Citas:

---------- APA ----------
Ojeda, F.S., Hoc, P.S., Galati, B.G. & García, M.T.A. (2014) . Ontogeny of the extrafloral nectaries of Vigna adenantha (Leguminosae, Phaseolae) and its relation with floral development. Botanical Studies, 55(1).
http://dx.doi.org/10.1186/s40529-014-0074-2
---------- CHICAGO ----------
Ojeda, F.S., Hoc, P.S., Galati, B.G., García, M.T.A. "Ontogeny of the extrafloral nectaries of Vigna adenantha (Leguminosae, Phaseolae) and its relation with floral development" . Botanical Studies 55, no. 1 (2014).
http://dx.doi.org/10.1186/s40529-014-0074-2
---------- MLA ----------
Ojeda, F.S., Hoc, P.S., Galati, B.G., García, M.T.A. "Ontogeny of the extrafloral nectaries of Vigna adenantha (Leguminosae, Phaseolae) and its relation with floral development" . Botanical Studies, vol. 55, no. 1, 2014.
http://dx.doi.org/10.1186/s40529-014-0074-2
---------- VANCOUVER ----------
Ojeda, F.S., Hoc, P.S., Galati, B.G., García, M.T.A. Ontogeny of the extrafloral nectaries of Vigna adenantha (Leguminosae, Phaseolae) and its relation with floral development. Bot. Stud. 2014;55(1).
http://dx.doi.org/10.1186/s40529-014-0074-2