Abstract
The application of methyl jasmonate (MeJA) to grapes ( Vitis vinifera L.) may decrease fruit detachment force (FDF) and promote the development of dry stem scars on the berries, both of which could improve the quality of machine-harvested raisin grapes. However, treatment with MeJA also promotes preharvest fruit drop, which is undesirable. Thus, experiments were conducted to determine how the concentration of MeJA applied and time after treatment affect FDF and abscission of grapes. Mature ‘Thompson Seedless’ grapevines were treated with one of five different solutions containing 0, 0.2, 2, 10, or 20 m m MeJA, and FDF and fruit abscission were monitored for ≈2 weeks. Treatment with 2 m m or less MeJA had inconsistent effects on FDF and did not promote abscission, whereas treatment with 10 to 20 m m MeJA reduced FDF within 2 to 3 days after treatment (DAT) and promoted abscission, which began on ≈3 DAT and persisted for ≈8 DAT. Thus, to optimize the use of MeJA as a harvest aid for ‘Thompson Seedless’ may require application of between 2 and 10 m m MeJA followed by harvest within 3 DAT.
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Claims 5
Claim · model-written summary
At 2 m m or less, MeJA had inconsistent effects on fruit detachment force.
Verbatim
e0“Treatment with 2 m m or less MeJA had inconsistent effects on FDF and did not promote abscission”
e1“The application of methyl jasmonate (MeJA) to grapes ( Vitis vinifera L.) may decrease fruit detachment force (FDF) and promote the development of dry stem scars on the berries, both of which could improve the quality of machine-harvested raisin grapes.”
e2“Mature ‘Thompson Seedless’ grapevines were treated with one of five different solutions containing 0, 0.2, 2, 10, or 20 m m MeJA”
Claim · model-written summary
At 2 m m or less, MeJA did not promote abscission.
Not reportedComparator
Verbatim
e0“Treatment with 2 m m or less MeJA had inconsistent effects on FDF and did not promote abscission”
e1“The application of methyl jasmonate (MeJA) to grapes ( Vitis vinifera L.) may decrease fruit detachment force (FDF) and promote the development of dry stem scars on the berries, both of which could improve the quality of machine-harvested raisin grapes.”
Claim · model-written summary
At 10 to 20 m m, MeJA reduced fruit detachment force within 2 to 3 days.
- Taxon
- grapese1
- Treatment
- 10 to 20 m m MeJAe0
- Outcome
- FDFe0
- Direction
- reducede0
- Value
- 2 to 3 dayse0
- Qualifier
- after treatment (DAT)e0
Not reportedComparator
Verbatim
e0“treatment with 10 to 20 m m MeJA reduced FDF within 2 to 3 days after treatment (DAT)”
e1“The application of methyl jasmonate (MeJA) to grapes ( Vitis vinifera L.) may decrease fruit detachment force (FDF) and promote the development of dry stem scars on the berries, both of which could improve the quality of machine-harvested raisin grapes.”
Claim · model-written summary
At 10 to 20 m m, MeJA promoted abscission beginning about day 3 and persisting about 8 days.
- Taxon
- grapese1
- Treatment
- 10 to 20 m m MeJAe2
- Outcome
- abscissione0
- Direction
- promotede0
- Value
- ≈3 DATe0
- Qualifier
- persisted for ≈8 DATe0
Not reportedComparator
Verbatim
e0“promoted abscission, which began on ≈3 DAT and persisted for ≈8 DAT”
e1“The application of methyl jasmonate (MeJA) to grapes ( Vitis vinifera L.) may decrease fruit detachment force (FDF) and promote the development of dry stem scars on the berries, both of which could improve the quality of machine-harvested raisin grapes.”
e2“treatment with 10 to 20 m m MeJA reduced FDF within 2 to 3 days after treatment (DAT)”
Claim · model-written summary
The authors suggest applying between 2 and 10 m m MeJA and harvesting within 3 DAT.
Verbatim
e0“may require application of between 2 and 10 m m MeJA followed by harvest within 3 DAT”
e1“The application of methyl jasmonate (MeJA) to grapes ( Vitis vinifera L.) may decrease fruit detachment force (FDF) and promote the development of dry stem scars on the berries, both of which could improve the quality of machine-harvested raisin grapes.”
The same questions in other papers
(-)-methyl jasmonate · yield · VitisPositive and negative results
1 paper in the same direction as this paper · 5 in the opposite direction
- positive
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3 papers more in this group
See all 7 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.