The timing of male and female flower development, in Actinidia deliciosa, was studied through observations using light and scanning electron microscopes. The data confirmed the presence of hermaphroditic flowers at the initial developmental phases which become successively unisexual. In the male flowers the stop of pistil development was observed six weeks before anthesis, when archesporial cells in anthers are observed; in these flowers the ovary is characterised by a loculus with vacuolated placental tissue, without ovules. In the female flowers, at anthesis, the stamens are completely differentiated but there are no viable pollen grains in the anthers. Pollen degeneration starts a few days after microsporogenesis; at this stage microspores have a thin wall, a poor cytoplasm and a degenerating nucleus.
The development of Male and Female Flowers in Actinidia deliciosa
REALE, Lara;FERRANTI, Francesco
2010
Abstract
The timing of male and female flower development, in Actinidia deliciosa, was studied through observations using light and scanning electron microscopes. The data confirmed the presence of hermaphroditic flowers at the initial developmental phases which become successively unisexual. In the male flowers the stop of pistil development was observed six weeks before anthesis, when archesporial cells in anthers are observed; in these flowers the ovary is characterised by a loculus with vacuolated placental tissue, without ovules. In the female flowers, at anthesis, the stamens are completely differentiated but there are no viable pollen grains in the anthers. Pollen degeneration starts a few days after microsporogenesis; at this stage microspores have a thin wall, a poor cytoplasm and a degenerating nucleus.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
