Claim · model-written summary
Longer photoperiods proportionally increased hardiness only in prestarved stems.
- Taxon
- Hedera helix L. var. Thorndale
Hedera helixt0 - Organ / stage
- stemse0
- Treatment
- increased photoperiodse0
- Outcome
- hardinesse0
- Direction
- increasese0
- Qualifier
- prestarved plantse0
Not reportedMaterialGeneCompoundInteractorInteractor roleSecond interactorSecond interactor roleComparatorSettingValue
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“proportional increases in hardiness in response to increased photoperiods were demonstrated only in stems of prestarved plants.”
t0“Hedera helix L. var. Thorndale”
Title
The Role of Light in Cold Acclimation of Hedera helix L. var. Thorndale
Peter L. Steponkus; F. O. Lanphear PLANT PHYSIOLOGY 1968. doi:10.1104/pp.43.2.151
Other claims from this paper (8)
- Intervention effect Light greatly increased cold hardiness.
- Observation Cold acclimation could occur without light.
- Intervention effect Photoperiods of 8 to 24 hours equally promoted maximum hardiness.
- Intervention effect Low light intensities stimulated maximum hardiness.
- Intervention effect Short photoperiods stimulated maximum hardiness.
- Intervention effect CO(2) exclusion decreased hardiness.
- Intervention effect High concentrations of photosynthetic inhibitors decreased hardiness.
- Observation Hardiness under these treatments did not fall to the dark control level.