Claim · model-written summary
PhyA photoirreversibly triggers seed germination under UV, visible and far-red light of very low fluence.
- Taxon
- Arabidopsis thaliana
Arabidopsis thalianae0 - Gene
- PhyAe6
- Outcome
- the germinatione6
Not reportedMaterialCompoundOrgan / stageInteractorInteractor roleSecond interactorSecond interactor roleTreatmentComparatorSettingDirectionValueQualifier
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“We have examined the seed germination in Arabidopsis thaliana of wild type (wt)”
e6“The present work clearly demonstrated that PhyA photoirreversibly triggers the germination upon irradiations with ultraviolet, visible and far-red light of very low fluence, while PhyB controls the photoreversible effects of low fluence”
Title
T Shinomura; A Nagatani; H Hanzawa; et al. Proceedings of the National Academy of Sciences 1996. doi:10.1073/pnas.93.15.8129
Other claims from this paper (8)
- Observation The phyB-null mutant seeds did not germinate under the tested dark incubation and light conditions.
- Intervention effect Seed germination of wild type and phyA-null seeds was photoreversibly regulated by red and far-red light of 10-1,000 micromol m-2.
- Intervention effect Phytochrome B mutant seeds that were incubated in darkness for 48 hr synthesized PhyA and germinated under red and far-red light.
- Observation The phyA-null mutant showed no such germination response to red and far-red light after 48 hr dark incubation.
- Intervention effect Monochromatic 300-780 nm light of very low fluence induced PhyA-dependent germination that was not photoreversible.
- Intervention effect Germination under alternating 540-690 nm and 695-780 nm irradiation at 0.01-1 mmol m-2 was photoreversibly regulated by PhyB.
- Mechanism PhyB controls the photoreversible effects of low fluence on seed germination.
- Mechanism Seed germination is regulated by PhyA and PhyB but not by other phytochromes.