Abstract
Abstract Preharvest applications of (2-chloroethyl)phosphonic acid (ethephon) on ‘Bearss’ lemons were relatively ineffective for inducing degreening or abscission. This was not due to lack of absorption or ethylene production. Similar rates of application as a postharvest dip induced degreening, suggesting that a factor from the tree inhibited the response to ethylene. This possibility was supported by data from further tests on ‘Bearss’ lemons and on ‘Robinson’, ‘Lee’, and ‘Dancy’ tangerines and ‘Hamlin’ oranges. Degreening and abscission responses to ethephon in detached fruit or fruit on which the stem was girdled were greater than in fruit on the tree. Applications of gibberellic acid retarded these responses. The results varied among cultivars and between the degreening and abscission responses. However, the general response pattern suggests that the tree provides a factor (or factors) which, on translocation to the fruit, inhibits degreening and abscission. This inhibitory factor may be a growth promoter such as auxin, gibberellin, or cytokinin.
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Claims 11
Claim · model-written summary
Preharvest ethephon was relatively ineffective for inducing degreening in Bearss lemons.
- Material
- ‘Bearss’e0
- Treatment
- Preharvest applications of (2-chloroethyl)phosphonic acid (ethephon)e0
- Outcome
- degreeninge0
- Direction
- relatively ineffectivee0
CitrusNot reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Preharvest applications of (2-chloroethyl)phosphonic acid (ethephon) on ‘Bearss’ lemons were relatively ineffective for inducing degreening or abscission.”
t0“Citrus”
Claim · model-written summary
Preharvest ethephon was relatively ineffective for inducing abscission in Bearss lemons.
- Material
- ‘Bearss’e0
- Treatment
- Preharvest applications of (2-chloroethyl)phosphonic acid (ethephon)e0
- Outcome
- abscissione0
- Direction
- relatively ineffectivee0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Preharvest applications of (2-chloroethyl)phosphonic acid (ethephon) on ‘Bearss’ lemons were relatively ineffective for inducing degreening or abscission.”
t0“Citrus”
Claim · model-written summary
The limited preharvest response was not attributed to lack of absorption or ethylene production.
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“This was not due to lack of absorption or ethylene production.”
e1“‘Bearss’ lemons were relatively ineffective for inducing degreening or abscission.”
t0“Citrus”
Claim · model-written summary
A postharvest dip at similar ethephon rates induced degreening.
- Material
- ‘Bearss’e1
- Treatment
- postharvest dipe0
- Outcome
- degreeninge0
- Direction
- inducede0
- Comparator
- Similar rates of applicatione0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Similar rates of application as a postharvest dip induced degreening”
e1“on ‘Bearss’ lemons were relatively ineffective”
t0“Citrus”
Claim · model-written summary
Detached or stem-girdled citrus fruit had greater ethephon-induced degreening than fruit on the tree.
- Treatment
- detached fruit or fruit on which the stem was girdlede0
- Outcome
- Degreeninge0
- Direction
- greatere0
- Comparator
- fruit on the treee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Degreening and abscission responses to ethephon in detached fruit or fruit on which the stem was girdled were greater than in fruit on the tree.”
t0“Citrus”
Claim · model-written summary
Detached or stem-girdled citrus fruit had greater ethephon-induced abscission than fruit on the tree.
- Treatment
- detached fruit or fruit on which the stem was girdlede0
- Outcome
- abscissione0
- Direction
- greatere0
- Comparator
- fruit on the treee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Degreening and abscission responses to ethephon in detached fruit or fruit on which the stem was girdled were greater than in fruit on the tree.”
t0“Citrus”
Claim · model-written summary
Gibberellic acid applications retarded degreening.
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Applications of gibberellic acid retarded these responses.”
e1“Degreening and abscission responses to ethephon”
t0“Citrus”
Claim · model-written summary
Gibberellic acid applications retarded abscission.
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Applications of gibberellic acid retarded these responses.”
e1“Degreening and abscission responses to ethephon”
t0“Citrus”
Claim · model-written summary
Response patterns varied among cultivars and between degreening and abscission.
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The results varied among cultivars and between the degreening and abscission responses.”
t0“Citrus”
Claim · model-written summary
The authors infer that a factor translocated from the tree inhibits fruit degreening and abscission.
- Outcome
- degreening and abscissione0
- Qualifier
- the tree provides a factor (or factors) which, on translocation to the fruit, inhibitse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the tree provides a factor (or factors) which, on translocation to the fruit, inhibits degreening and abscission.”
t0“Citrus”
Claim · model-written summary
The inhibitory factor was hypothesized to be a growth promoter such as auxin, gibberellin or cytokinin.
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“This inhibitory factor may be a growth promoter such as auxin, gibberellin, or cytokinin.”
e1“inhibits degreening and abscission.”
t0“Citrus”
The same questions in other papers
Gibberellic acid · yield · CitrusPositive and negative results
2 in the opposite direction
- positive
- positive
(2-chloroethyl)phosphonic acid · yield · CitrusPositive and negative results
2 papers in the same direction as this paper · 1 in the opposite direction
- positive
- negative
- negative
pruning · yield · CitrusPositive and negative results
11 papers in the same direction as this paper · 5 in the opposite direction
- negative
- negative
- no effect
13 papers more in this group
See all 17 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.