Endosperm formation in aposporous Crataegus (Rosaceae, Spiraeoideae, tribe Pyreae) : parallels to Ranunculaceae and Poaceae
Apomixis in Crataegus is primarily aposporous and requires pollination. The embryo sac is of the Polygonum type. A combination of meiotically unreduced embryo sacs with apparently reduced pollen would violate the usual requirement for a 2 : 1 ratio of maternal to paternal contributions to the endosp...
| Veröffentlicht in: | The New phytologist. - 1990. - 173(2007), 2 vom: 20., Seite 231-49 |
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| Format: | Aufsatz |
| Sprache: | English |
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2007
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| Zugriff auf das übergeordnete Werk: | The New phytologist |
| Schlagworte: | Journal Article Research Support, Non-U.S. Gov't |