Claim · model-written summary
Couroupita develops monosymmetry through abaxial dominance and an androecial hood, affecting perianth and androecium but not gynoecium.
- Taxon
- Couroupita
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Couroupitae0 - Organ / stage
- perianth and androeciume0
- Outcome
- monosymmetrye0
- Qualifier
- expression of abaxial dominance and the development of an androecial hoode0
Not reportedMaterialGeneCompoundInteractorInteractor roleSecond interactorSecond interactor roleTreatmentComparatorSettingDirectionValue
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
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Verbatim
e0“At level two, represented only by Couroupita, monosymmetry is established through the expression of abaxial dominance and the development of an androecial hood; at this level, abaxial dominance impacts the perianth and androecium, but not the gynoecium.”
Title
Floral organogenesis and floral evolution of the Lecythidoideae (Lecythidaceae)
Chih‐Hua Tsou; Scott A. Mori American Journal of Botany 2007. doi:10.3732/ajb.94.5.716
Other claims from this paper (7)
- Observation Grias and Gustavia have polysymmetric flowers.
- Observation Couratari and Cariniana domestica developed floral monosymmetry.
- Mechanism The Allantoma/Cariniana decandra lineage reverted to polysymmetric flowers as abaxial dominance weakened and the hood was lost.
- Observation In Bertholletia, Corythophora, Eschweilera, and Lecythis, abaxial dominance extends to the gynoecium.
- Observation In the level-four lineage, the hood is structurally and functionally complex and the floral axis is slightly inclined.
- Mechanism The authors attribute floral monosymmetry to development of abaxial dominance.
- Mechanism The authors suggest that more efficient pollination by bees and bats ultimately explains monosymmetry.