Claim · model-written summary
Competent cells begin development immediately after receiving the stimulus.
- Taxon
- FLOWERING PLANTSMagnoliopsidat0
- Outcome
- start to develop, with no delay in a ‘determined’ statee0
Not reportedMaterialGeneCompoundOrgan / stageInteractorInteractor roleSecond interactorSecond interactor roleTreatmentComparatorSettingDirectionValueQualifier
Verbatim
t0“FLOWERING PLANTS”
e0“Once competent cells have received the stimulus they start to develop, with no delay in a ‘determined’ state”
Title
THE REGULATION OF ALTERNATION OF GENERATION IN FLOWERING PLANTS
By H. G. Dickinson Biological reviews/Biological reviews of the Cambridge Philosophical Society 1994. doi:10.1111/j.1469-185x.1994.tb01277.x
Other claims from this paper (11)
- Observation Many sequences are specifically expressed in either the sporophyte or gametophyte.
- Observation Some constituents, including tubulin, are encoded by different genes in the two generations.
- Mechanism Evidence suggests flowering gene switching is controlled by complex systems coordinating cell group and timing.
- Mechanism Alternation of generations appears restricted to cells competent to receive developmental stimuli.
- Mechanism The stimulus can direct competent cells into sporophytic or gametophytic pathways.
- Mechanism Competence acquisition appears to involve symplast isolation, cytoplasmic dedifferentiation, and possibly cell-cycle arrest or transition.
- Mechanism In vivo stimuli for generation switching appear metabolic.
- Mechanism Specific glycoprotein classes may activate embryogenesis.
- Mechanism Agamospermic systems suggest egg fertilization itself does not activate sporophytic development.
- Observation Sporophytic and gametophytic development usually begin with asymmetric division.
- Observation Female gametophytes can arise through different developmental pathways depending on species.