Ovule ontogeny in Rubiaceae (Juss.): Chomelia obtusa (Cinchonoideae-Guettardeae) and Ixora coccinea (Ixoroideae-Ixoreae)

Ovule development and gynosporogenesis (megasporogenesis) of two Rubiaceae, Chomelia obtusa (Cinchonoideae-Guettardeae) and Ixora coccinea (Ixoroideae-Ixoreae) were studied. Based on the new results it is proposed that the Ixora type' of ovule development is established because of the convex nu...

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Bibliographic Details
Published in:Plant systematics and evolution 2008-05, Vol.272 (1-4), p.39-48
Main Authors: De Toni, K. L. G, Mariath, J. E. A
Format: Article
Language:English
Subjects:
Biological taxonomies
Biomedical and Life Sciences
Carpels
Chomelia obtusa
Embryology
Epidermis
Evolution
gynosporogenesis
Integument
Ixora coccinea
Life Sciences
Mother cells
nucellus
Ontogeny
ovule
Ovules
Placenta
Plant Anatomy/Development
Plant Ecology
Plant Sciences
Plant Systematics/Taxonomy/Biogeography
Rubiaceae
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Summary:Ovule development and gynosporogenesis (megasporogenesis) of two Rubiaceae, Chomelia obtusa (Cinchonoideae-Guettardeae) and Ixora coccinea (Ixoroideae-Ixoreae) were studied. Based on the new results it is proposed that the Ixora type' of ovule development is established because of the convex nucellus and the presence of several archesporial cells. This result supports the close relationships of Cinchonoideae and Ixoroideae established by molecular systematic studies.
ISSN:0378-2697
1615-6110
2199-6881
DOI:10.1007/s00606-007-0635-x