Ontogeny, anatomy and systematic significance of ovular structures in the 'eucalypt group' (Eucalypteae, Myrtaceae)

Autor:	Andrew N. Drinnan, A. Bohte
Rok vydání:	2005
Předmět:	food.ingredient Corymbia biology Allosyncarpia Lophostemon confertus Microcorys Plant Science Arillastrum biology.organism_classification food Stockwellia Botany Angophora Subgenus Ecology Evolution Behavior and Systematics
Zdroj:	Plant Systematics and Evolution. 255:17-39
ISSN:	1615-6110 0378-2697
DOI:	10.1007/s00606-004-0291-3
Popis:	Development of ovular structures in the `eucalypt group' (Eucalyteae, Myrtaceae) was investigated using scanning electron microscopy and light microscopy. Different modes of placental expansion account for the variation in initiation and arrangement of ovules and ovulodes. In Eucalyptus sensu stricto placental elongation proceeds proximally and the distally-positioned ovulodes develop from the first primordia initiated (congenital ovulodes). In Angophora, Corymbia, Arillastrum, Allosyncarpia and Stockwellia placental elongation is bi-directional and the ovulodes develop from last-initiated primordia (residual ovulodes). Bi-directional elongation and residual ovulodes are present in the outgroup taxon Lophostemon confertus and is presumably plesiomorphic. This suite of characters is potentially informative for resolving relationships for several key taxa: E. microcorys (subgenus Symphyomyrtus) has proximal placental expansion and congenital ovulodes, which is consistent with most Eucalyptus; E. curtisii (subgenus Gaubaea) has the plesiomophic condition and may be sister to all other species of Eucalyptus.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::e33cee65592788298771a9a054d0bf03 https://doi.org/10.1007/s00606-004-0291-3 Zobrazit plný text záznamu Plný text ve formátu PDF