Abstract
Abstract Four greenhouse rose cultivars were grown under 9, 12, and 16-hr daylengths from September to May during 1969-70 and 1970-71. Flower production was generally increased significantly under the 16-hr daylength, particularly during January and February. At this day length, rose stems flowered again more quickly, but with the same number of nodes present as in the other treatments. The internode between the 2 uppermost 5-leaflet leaves was significantly longer on plants grown at 16 and 12 hr than the 9-hr daylengths. Flower fresh and dry wt increased as the daylengths increased from 9 to 16 hr and the percentages of blind stems were found to decrease. Rose leaf and flower petal size were unchanged by the daylength.
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Claims 8
Claim · model-written summary
A 16-hr daylength increased flower production, particularly in January and February.
- Taxon
- Roses (Rosa hybrida)
Rosa hybrid cultivart0 - Treatment
- 16-hr daylengthe0
- Outcome
- Flower productione0
- Direction
- increasede0
- Qualifier
- particularly during January and Februarye0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Flower production was generally increased significantly under the 16-hr daylength, particularly during January and February.”
t0“Roses (Rosa hybrida)”
Claim · model-written summary
At 16 hours, rose stems flowered again more quickly.
- Taxon
- Roses (Rosa hybrida)Rosa hybrid cultivart0
- Treatment
- this day lengthe0
- Outcome
- rose stems flowered againe0
- Direction
- more quicklye0
- Comparator
- other treatmentse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“At this day length, rose stems flowered again more quickly, but with the same number of nodes present as in the other treatments.”
t0“Roses (Rosa hybrida)”
Claim · model-written summary
Node number remained the same at 16 hours as under other daylengths.
- Taxon
- Roses (Rosa hybrida)Rosa hybrid cultivart0
- Treatment
- this day lengthe0
- Outcome
- number of nodese0
- Direction
- samee0
- Comparator
- other treatmentse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“At this day length, rose stems flowered again more quickly, but with the same number of nodes present as in the other treatments.”
t0“Roses (Rosa hybrida)”
Claim · model-written summary
The upper internode was longer at 16 and 12 hours than at 9 hours.
- Taxon
- Roses (Rosa hybrida)Rosa hybrid cultivart0
- Treatment
- 16 and 12 hre0
- Outcome
- internode between the 2 uppermost 5-leaflet leavese0
- Direction
- longere0
- Comparator
- 9-hr daylengthse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The internode between the 2 uppermost 5-leaflet leaves was significantly longer on plants grown at 16 and 12 hr than the 9-hr daylengths.”
t0“Roses (Rosa hybrida)”
Claim · model-written summary
Flower fresh 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
- Flower freshe0
- Direction
- increasede0
Not reportedComparator
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)”
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 reportedComparator
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)”
Claim · model-written summary
Blind-stem percentages decreased with longer daylengths.
- Taxon
- Roses (Rosa hybrida)Rosa hybrid cultivart0
- Outcome
- percentages of blind stemse0
- Direction
- decreasee0
Not reportedTreatmentComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the percentages of blind stems were found to decrease”
t0“Roses (Rosa hybrida)”
Claim · model-written summary
Leaf and petal size did not change with daylength.
- Taxon
- Roses (Rosa hybrida)Rosa hybrid cultivart0
- Treatment
- daylengthe0
- Outcome
- leaf and flower petal sizee0
- Direction
- unchangede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Rose leaf and flower petal size were unchanged by the daylength.”
t0“Roses (Rosa hybrida)”
The same questions in other papers
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See all 13 papers →Claims are grouped by organism, treatment and what was measured or targeted. A paper counts as positive when any of its claims in the group is positive.