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- Title
Embryology of H arrisonia ( Cneoroideae, Rutaceae): a comparison with related genera and families.
- Authors
Yamamoto, Takenori; Fijridiyanto, Izu Andry; Tobe, Hiroshi
- Abstract
H arrisonia, a genus of three or more species distributed from tropical Africa and Southeast Asia to northern Australia, has long been considered a member of Simaroubaceae. Recent molecular analyses, however, have shown that the genus is assigned to subfamily Cneoroideae of Rutaceae, in which Cneoroideae (eight genera) are sister to the remainder of the family ('core Rutaceae'). Here, we report embryological features of H arrisonia based on published and newly obtained data and provide morphological corroboration for the molecular affinities of the genus and Cneoroideae. We compared its embryological features with those of seven other genera of Cneoroideae and with those of the core Rutaceae and related families (Meliaceae, Simaroubaceae and Sapindaceae). Comparisons showed that H arrisonia fits within Cneoroideae through possessing campylotropous seeds with a multi-cell-layered endotesta. Embryological evidence, like molecular evidence, further shows that, in Cneoroideae, H arrisonia probably has affinities to a group of B ottegoa, C edrelopsis, C neorum and P taeroxylon by sharing a micropyle formed by the inner integument alone and solitary oil cells in the testa. Except for H arrisonia, Cneoroideae are still poorly understood embryologically and further investigations are needed.
- Subjects
SOUTHEAST Asia; AFRICA; PLANT embryology; RUTACEAE; PHYTOGEOGRAPHY; SIMAROUBACEAE
- Publication
Botanical Journal of the Linnean Society, 2016, Vol 180, Issue 3, p386
- ISSN
0024-4074
- Publication type
Article
- DOI
10.1111/boj.12371