Abstract
Two studies were conducted to determine how methyl jasmonate (MeJA), jasmonic acid (JA), and 1-aminocyclopropane-1-carboxylic acid (ACC) affect grape berry abscission in the initial days after treatment. The overarching goal was to determine whether JA, with or without ACC, may hold the potential to sufficiently reduce fruit detachment force (FDF) and increase the proportion of berries with dry stem scars while minimizing preharvest abscission, effects that could be useful in the production of stemless table grapes. On Thompson Seedless grapes, JA was at least as effective as MeJA for stimulating berry abscission based on reduced fruit detachment force (FDF) and yielding detached berries with dry stem scars. Further, since previous studies showed that ACC improved MeJA-induced grape abscission, we tested ACC effects on JA activity. We found that JA rapidly induced preharvest berry abscission, confirming previous results. ACC alone did not induce preharvest berry abscission, but ACC improved the effectiveness of JA on reducing FDF and increasing dry stem scar development. These studies also demonstrated that JA-induced abscission occurs within the first day after treatment. Commercial use of JA plus ACC as an abscission agent requires that FDF sufficiently declines, and the incidence of dry stem scars increases, prior to a significant increase in fruit abscission. However, the rapid progression of fruit abscission may require harvest either within 24 and 48 h after treatment or the use of a passive catch system.
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Claims 8
Claim · model-written summary
JA reduced fruit detachment force at least as effectively as MeJA.
Verbatim
e0“On Thompson Seedless grapes, JA was at least as effective as MeJA for stimulating berry abscission based on reduced fruit detachment force (FDF)”
Claim · model-written summary
JA yielded detached berries with dry stem scars at least as effectively as MeJA.
- Taxon
- grapese0
- Material
- Thompson Seedlesse0
- Treatment
- JAe0
- Outcome
- detached berries with dry stem scarse0
- Comparator
- MeJAe0
Not reportedDirection
Verbatim
e0“On Thompson Seedless grapes, JA was at least as effective as MeJA for stimulating berry abscission based on reduced fruit detachment force (FDF) and yielding detached berries with dry stem scars.”
Claim · model-written summary
JA rapidly induced preharvest berry abscission.
Not reportedComparatorDirection
Verbatim
e0“JA rapidly induced preharvest berry abscission”
t0“Grapes”
Claim · model-written summary
ACC alone did not induce preharvest berry abscission.
Not reportedComparatorDirection
Verbatim
e0“ACC alone did not induce preharvest berry abscission”
t0“Grapes”
Claim · model-written summary
ACC improved the JA effect on reducing fruit detachment force.
Verbatim
e0“ACC improved the effectiveness of JA on reducing FDF”
t0“Grapes”
Claim · model-written summary
ACC improved the JA effect on increasing dry stem scar development.
Verbatim
e0“ACC improved the effectiveness of JA on reducing FDF and increasing dry stem scar development.”
t0“Grapes”
Claim · model-written summary
JA-induced abscission occurred within the first day after treatment.
Verbatim
e0“JA-induced abscission occurs within the first day after treatment.”
t0“Grapes”
Claim · model-written summary
The authors suggest harvesting within 24 and 48 h or using a passive catch system because of rapid abscission.
Verbatim
e0“the rapid progression of fruit abscission may require harvest either within 24 and 48 h after treatment or the use of a passive catch system.”
t0“Grapes”
The same questions in other papers
1-aminocyclopropanecarboxylic acid · yield · VitisPositive and negative results
1 in the opposite direction
- positive
1-aminocyclopropanecarboxylic acid · growth · VitisPositive and negative results
1 paper in the same direction as this paper · 1 in the opposite direction
- positive
- no effect
jasmonic acid · yield · VitisPositive and negative results
1 paper in the same direction as this paper · 1 in the opposite direction
- positive
- no effect
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.