Claim · model-written summary
Flower dry weight increased with daylength from 9 to 16 hours.
- Taxon
- Roses (Rosa hybrida)
Rosa hybrid cultivart0 - Treatment
- daylengths increased from 9 to 16 hre0
- Outcome
- dry wte0
- Direction
- increasede0
Not reportedMaterialGeneCompoundOrgan / stageInteractorInteractor roleSecond interactorSecond interactor roleComparatorSettingValueQualifier
Organisms pictured · Representative pictures of the matched species, not figures from the paper.

Verbatim
e0“Flower fresh and dry wt increased as the daylengths increased from 9 to 16 hr”
t0“Roses (Rosa hybrida)”
Title
Effect of Daylength on the Growth and Flowering of Roses (Rosa hybrida)1
W. J. Carpenter; R. C. Rodriguez; W. H. Carlson Journal of the American Society for Horticultural Science 1972. doi:10.21273/jashs.97.1.135
Other claims from this paper (7)
- Intervention effect A 16-hr daylength increased flower production, particularly in January and February.
- Intervention effect At 16 hours, rose stems flowered again more quickly.
- Intervention effect Node number remained the same at 16 hours as under other daylengths.
- Intervention effect The upper internode was longer at 16 and 12 hours than at 9 hours.
- Intervention effect Flower fresh weight increased with daylength from 9 to 16 hours.
- Intervention effect Blind-stem percentages decreased with longer daylengths.
- Intervention effect Leaf and petal size did not change with daylength.