Claim · model-written summary
Between 2 and 10 days of dark storage, gibberellic acid had little effect on germination.
- Taxon
- Lactuca sativa
Lactuca sativae0 - Treatment
- gibberellic acide4
- Outcome
- effecte4
- Qualifier
- between 2 and 10 days of dark storagee4
Not reportedMaterialGeneCompoundOrgan / stageInteractorInteractor roleSecond interactorSecond interactor roleComparatorSettingDirectionValue
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Grand Rapids lettuce (Lactuca sativa L.) seeds”
e4“With between 2 and 10 days of dark storage, gibberellic acid had little effect, while promotion by red light decreased slowly and finally disappeared”
Title
Actions of Gibberellic Acid and Phytochrome on the Germination of Grand Rapids Lettuce Seeds
William Vidaver; A. I-Hsiung Hsiao PLANT PHYSIOLOGY 1974. doi:10.1104/pp.53.2.266
Other claims from this paper (10)
- Intervention effect Red light and gibberellic acid were about equally effective in promoting germination of lettuce seeds.
- Observation With initial far red light treatment, more than 80% of seeds remained dormant in subsequent dark storage.
- Intervention effect After 2 days of dark storage, red light promoted germination.
- Intervention effect After 2 days of dark storage, gibberellic acid action was weak.
- Intervention effect Between 2 and 10 days of dark storage, the promotion of germination by red light decreased slowly and finally disappeared.
- Intervention effect After 10 days of dark storage, both gibberellic acid and red light were required for germination.
- Mechanism Dark storage interferes with phytochrome-independent germination processes and cannot be overcome by added gibberellic acid.
- Association Storage may decrease the effectiveness of endogenous gibberellins.
- Mechanism Phytochrome-dependent germination seems to require only low levels of endogenous gibberellin activity or added gibberellic acid.
- Mechanism Gibberellins and red light appear to act on germination by regulating sequential sites of a branched-looped pathway.