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Reproductive biology of viscum cruciatum (viscaceae) in southern spain

Opened Access Reproductive biology of viscum cruciatum (viscaceae) in southern spain

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Autor: Aparicio Martínez, Abelardo
Gallego Cidoncha, María Jesús
Vázquez, Carlos
Departamento: Universidad de Sevilla. Departamento de Biología Vegetal y Ecología
Fecha: 1995
Publicado en: International Journal of Plant Sciences, 156 (1), 42-49.
Tipo de documento: Artículo
Resumen: The reproductive biology of the dioecious Viscum cruciatum, one of the few viscaceous mistletoes occurring in Europe, was investigated. The male flower is 7.2 mm long and lemon-scented, produces ca. 58,000 pollen grains, and has a dry mass of 14 mg, and thus a low relative staminate effort (RSE) value of 4,059. Female flowers, ca. 3 mm long, 2.7 mg dry mass, secrete small amounts of nectar (0.05 mg sugar/d). A stigma is not apparent. Flowers inside nylon bags (i.e., insect-free) set significantly less fruit than control branches open to natural pollination. Pollination is performed by insects. Flowers bagged against insects but not wind set some fruit. Flowers bagged with dense cloth excluding wind and insect pollination did not set any fruit. Agamospermous embryo production does not take place in this species and cannot be the cause of the shift in sex-ratio toward females. Fruits can contain one (45%), two (43.6%), three (11%), or four (0.3%) embryos, which may not be true polyembry...
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Cita: Aparicio Martínez, A.E., Gallego Cidoncha, M.J. y Vázquez, C. (1995). Reproductive biology of viscum cruciatum (viscaceae) in southern spain. International Journal of Plant Sciences, 156 (1), 42-49.
Tamaño: 1.481Mb
Formato: PDF

URI: http://hdl.handle.net/11441/62704

DOI: 10.1086/297227

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