Claim · model-written summary
Delayed petal development and accelerated androecial growth explain common stamen-petal primordia.
- Taxon
- petalse0
- Outcome
- amalgamation of petals with the androeciume0
- Qualifier
- delay in petal development and acceleration of androecial growthe0
Not reportedMaterialGeneCompoundOrgan / stageInteractorInteractor roleSecond interactorSecond interactor roleTreatmentComparatorSettingDirectionValue
Verbatim
e0“Heterochronic shifts, including a delay in petal development and acceleration of androecial growth, are responsible for the amalgamation of petals with the androecium as common stamen-petal primordia and their appearance as stamen-derived appendages.”
Title
Lai Wei; Louis Ronse De Craene Annals of Botany 2019. doi:10.1093/aob/mcz075
Other claims from this paper (10)
- Observation The calyx is consistently well developed with quincuncial aestivation.
- Observation Petaloids arise by fractionation of common stamen-petal primordia in Spergularia.
- Observation Petaloid development is independent and precedes alternisepalous stamens in Saponaria.
- Observation Petaloid development is independent and precedes alternisepalous stamens in Sagina.
- Observation Sagina always has a fully formed petaloid whorl, while alternisepalous stamens are often reduced or absent.
- Observation Petaloids are absent in Gymnocarpos.
- Observation Petaloids are absent in the investigated Cerastium.
- Mechanism Development and character mapping reject a staminodial origin and suggest petaloids are independent second-whorl petals present in basal Caryophyllaceae.
- Mechanism The authors attribute variation, reduction and loss of petals in Caryophyllaceae to selective pollinator pressure.
- Association The petal trend largely corresponds to petal loss and perianth reorganization across core Caryophyllales.