Claim · model-written summary
Male floral meristems initiate five sepals followed by five stamens.
- Taxon
- hopt0
- Organ / stage
- male floral meristeme0
- Outcome
- five sepal primordia, followed by an inner whorl of five stamen primordiae0
Not reportedMaterialGeneCompoundInteractorInteractor roleSecond interactorSecond interactor roleTreatmentComparatorSettingDirectionValueQualifier
Verbatim
e0“Each male floral meristem initiates a whorl of five sepal primordia, followed by an inner whorl of five stamen primordia”
t0“hop”
Title
Sexual development and sex chromosomes in hop
H. L. SHEPHARD; J. S. PARKER; P. DARBY; et al. New Phytologist 2000. doi:10.1046/j.1469-8137.2000.00771.x
Other claims from this paper (15)
- Observation Male and female vegetative meristems are morphologically indistinguishable.
- Observation At reproductive transition, inflorescence apices shrink and sex differences appear.
- Observation Sex-specific differences occur extremely early in floral ontogeny.
- Observation Both sexes initiate bract-enclosed inflorescence meristems at each leaf node.
- Observation Male secondary inflorescences form asynchronous flower clusters.
- Observation Female inflorescences form flowers arranged in cones.
- Observation Male flowers show no carpel development.
- Observation Female flowers initiate two carpels and a vestigial perianth.
- Observation Female flowers show no stamen development.
- Observation Several monoecious lines carry bisexual flowers.
- Observation Bisexual flowers usually have perianth, stamen and carpel whorls.
- Observation Bisexual flower central whorls vary from fused stigmas to a developed gynoecium.
- Observation Chimaeric fused staminoid-carpelloid whorls also occur.
- Mechanism The authors infer that inappropriate sex organs are suppressed before visibility or not initiated.
- Mechanism The authors suggest sex development genes act before floral organogenesis.