Abstract
Abstract Four rose cultivars (‘Mercedes’, ‘Sonia’, ‘Visa’, and ‘Golden Times’) were grown under four night temperature regimes: 1) constant 18°C; 2) constant 14°; 3) 18° until midnight followed by 14° until 1 hr before sunrise; and 4) 18° alternated every 2 hr by 14°. A minimal temperature of 18° was maintained from 1 hr before sunrise in all treatments. Low temperature regimes resulted in an increase in the time period required for flower development and the number of flowers produced was lowest under the constant low temperature regime. The number of flowers produced under the two partial heating regimes was similar to the constant high temperature in 3 of the cultivars examined. Alternating the temperature every 2 hr stimulated the flower production of ‘Golden Times’. Under this regime, 28% more flowers were produced in comparison to a constant temperature of 18°.
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Claims 5
Claim · model-written summary
Low night temperatures lengthened flower development.
- Taxon
- Roset0
- Treatment
- Low temperature regimese0
- Outcome
- time period required for flower developmente0
- Direction
- increasee0
Not reportedComparator
Verbatim
e0“Low temperature regimes resulted in an increase in the time period required for flower development and the number of flowers produced was lowest under the constant low temperature regime.”
t0“Rose Plants”
Claim · model-written summary
Constant low night temperature produced the fewest flowers.
- Taxon
- Roset0
- Treatment
- constant low temperature regimee0
- Outcome
- number of flowers producede0
- Direction
- loweste0
Not reportedComparator
Verbatim
e0“Low temperature regimes resulted in an increase in the time period required for flower development and the number of flowers produced was lowest under the constant low temperature regime.”
t0“Rose Plants”
Claim · model-written summary
Partial heating produced flower numbers similar to constant high temperature in three cultivars.
Verbatim
e0“The number of flowers produced under the two partial heating regimes was similar to the constant high temperature in 3 of the cultivars examined.”
t0“Rose Plants”
Claim · model-written summary
Alternating night temperature every two hours stimulated Golden Times flower production.
- Taxon
- Roset0
- Material
- ‘Golden Times’e0
- Treatment
- Alternating the temperature every 2 hre0
- Outcome
- flower productione0
- Direction
- stimulatede0
Not reportedComparator
Verbatim
e0“Alternating the temperature every 2 hr stimulated the flower production of ‘Golden Times’.”
t0“Rose Plants”
Claim · model-written summary
Alternating temperature produced 28% more flowers than constant 18°.
Verbatim
e0“Under this regime, 28% more flowers were produced in comparison to a constant temperature of 18°.”
t0“Rose Plants”
e1“Alternating the temperature every 2 hr stimulated the flower production of ‘Golden Times’.”
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1 paper more in this group
See all 5 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.