Abstract
Petal abscission was studied in twelve hybrid tea rose (Rosa hybrida L.) cultivars. At about 20 °C the time to petal abscission in uncut stems in greenhouses was the same as in cut stems placed in water in the greenhouse or in a climate-controlled room. The time between petal unfolding and abscission depended on the cultivar, and varied between 12 and 35 d. The time to petal abscission of the cultivars was inversely correlated with their flower diameter at full bloom (linear regression, r2 = 0·82). In the cultivars with a relatively large flower diameter (10-18 cm) the petals fell without visible desiccation symptoms, whereas in the group with a small diameter the petals were partially or fully desiccated when shed. Fertilization occurred in some flowers of a few cultivars studied. In cultivars with a relatively large flower diameter (Papa Meilland, Cocktail, Dr. Verhage, Tineke) it had no effect on the time to abscission in Motrea, Europa, and Carolien roses, which bear small flowers, the petals fell after fertilization, whereas in unfertilized flowers of the latter group of cultivars an abscission zone just above the uppermost node became active and all parts above this node (pedicel and flower) turned brown and desiccated, though remained attached for more than a month. It is concluded that in the cultivars investigated: (a) the time to petal abscission was inversely related to their flower diameter, (b) abscised petals were more desiccated in cultivars in which the time to abscission was longer, (c) fertilization had little effect on the time to abscission in most cultivars, whereas the absence of fertilization prevented petal abscission in a number of the small-diameter cultivars where it was replaced by flower abscission, and (d) cutting and placement in water at 20 °C did not affect the time to abscission.Copyright 1995, 1999 Academic Press
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Claims 8
Claim · model-written summary
At about 20 °C petal abscission time was the same in uncut and cut stems.
- Taxon
- Rosa hybrida L.
Rosa hybrid cultivare1 - Outcome
- time to petal abscissione0
- Direction
- the samee0
- Qualifier
- At about 20 °Ce0
- Comparator
- uncut stemse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“At about 20 °C the time to petal abscission in uncut stems in greenhouses was the same as in cut stems placed in water in the greenhouse or in a climate-controlled room”
e1“Rosa hybrida L.”
Claim · model-written summary
Time between petal unfolding and abscission varied by cultivar from 12 to 35 days.
- Taxon
- Rosa hybrida L.Rosa hybrid cultivare1
- Outcome
- time between petal unfolding and abscissione0
- Direction
- variede0
- Value
- 12 and 35 de0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The time between petal unfolding and abscission depended on the cultivar, and varied between 12 and 35 d”
e1“Rosa hybrida L.”
Claim · model-written summary
Time to abscission correlated inversely with flower diameter.
- Taxon
- Rosa hybrida L.Rosa hybrid cultivare1
- Organ / stage
- flowere0
- Outcome
- time to petal abscissione0
- Direction
- inversely correlatede0
- Value
- r2 = 0·82e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The time to petal abscission of the cultivars was inversely correlated with their flower diameter at full bloom (linear regression, r2 = 0·82)”
e1“Rosa hybrida L.”
Claim · model-written summary
Large-flowered cultivars shed petals without visible desiccation.
- Taxon
- Rosa hybrida L.Rosa hybrid cultivare1
- Outcome
- petals fell without visible desiccation symptomse0
- Qualifier
- relatively large flower diametere0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“In the cultivars with a relatively large flower diameter (10-18 cm) the petals fell without visible desiccation symptoms”
e1“Rosa hybrida L.”
Claim · model-written summary
Small-flowered cultivars shed partially or fully desiccated petals.
- Taxon
- Rosa hybrida L.Rosa hybrid cultivare1
- Outcome
- petals were partially or fully desiccated when shede0
- Qualifier
- small diametere0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“in the group with a small diameter the petals were partially or fully desiccated when shed”
e1“Rosa hybrida L.”
Claim · model-written summary
Fertilization did not change abscission time in the named large-flowered cultivars.
- Taxon
- Rosa hybrida L.Rosa hybrid cultivare2
- Material
- Papa Meilland, Cocktail, Dr. Verhage, Tinekee0
- Treatment
- Fertilizatione1
- Outcome
- time to abscissione0
- Direction
- no effecte0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“In cultivars with a relatively large flower diameter (Papa Meilland, Cocktail, Dr. Verhage, Tineke) it had no effect on the time to abscission”
e1“Fertilization occurred in some flowers”
e2“Rosa hybrida L.”
Claim · model-written summary
In fertilized small-flowered Motrea, Europa, and Carolien roses, petals fell.
- Taxon
- Rosa hybrida L.Rosa hybrid cultivare1
- Material
- Motrea, Europa, and Caroliene0
- Outcome
- petals fell after fertilizatione0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“in Motrea, Europa, and Carolien roses, which bear small flowers, the petals fell after fertilization”
e1“Rosa hybrida L.”
Claim · model-written summary
In unfertilized small-flowered cultivars an abscission zone above the upper node activated and the flower remained attached after browning.
- Taxon
- Rosa hybrida L.Rosa hybrid cultivare1
- Outcome
- abscission zone just above the uppermost node became activee0
- Qualifier
- unfertilized flowerse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“in unfertilized flowers of the latter group of cultivars an abscission zone just above the uppermost node became active and all parts above this node (pedicel and flower) turned brown and desiccated, though remained attached for more than a month”
e1“Rosa hybrida L.”
The same questions in other papers
fertilization · yield · Rosa hybrid cultivarPositive and negative results
2 papers in the same direction as this paper · 3 in the opposite direction
- positive
- positive
- positive
2 papers more in this group
See all 6 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.