INVESTIGADORES
GALETTO Leonardo
capítulos de libros
Título:
Nectar
Autor/es:
LEONARDO GALETTO,; GABRIEL BERNARDELLO,
Libro:
Pollination ecology: a practical approach
Editorial:
No Informado
Referencias:
Lugar: No Informado; Año: 2005; p. 1 - 1
Resumen:
5.3 NECTAR by Leonardo Galetto and Gabriel Bernardello   5.3.1. Introduction Nectar is the most important reward offered by flowering plants to animal visitors. It is an aqueous, mostly sugary solution, secreted by specialized organs widespread among Angiosperms: nectaries (Fahn, 1979; Smets, 1986). There are basically two types of nectaries: floral and extrafloral (or nuptial and extranuptial respectively, after Delpino, 1868-1875), distinguished either by their position or their function (Elias et al., 1975; Smets, 1986).  Floral nectaries are involved in the pollination process and are located within the flower, while extrafloral nectaries may be located on the vegetative organs or on outer floral parts and can protect vegetative and reproductive structures from herbivores but they are never involved in pollen transfer (Elias, 1983; Koptur, 1992a; Whitman, 1994). In addition, there are post-floral nectaries, i.e., floral nectaries where nectar production goes on after anthesis and during fruit development. They are thought to protect the developing seeds (Faegri and van der Pijl, 1979; Keeler, 1981; Gracie, 1991; Freitas et al., 2001). Nectar is the most important reward offered by flowering plants to animal visitors. It is an aqueous, mostly sugary solution, secreted by specialized organs widespread among Angiosperms: nectaries (Fahn, 1979; Smets, 1986). There are basically two types of nectaries: floral and extrafloral (or nuptial and extranuptial respectively, after Delpino, 1868-1875), distinguished either by their position or their function (Elias et al., 1975; Smets, 1986).  Floral nectaries are involved in the pollination process and are located within the flower, while extrafloral nectaries may be located on the vegetative organs or on outer floral parts and can protect vegetative and reproductive structures from herbivores but they are never involved in pollen transfer (Elias, 1983; Koptur, 1992a; Whitman, 1994). In addition, there are post-floral nectaries, i.e., floral nectaries where nectar production goes on after anthesis and during fruit development. They are thought to protect the developing seeds (Faegri and van der Pijl, 1979; Keeler, 1981; Gracie, 1991; Freitas et al., 2001).