Abstract
Pod set in soybean is related to carbon partitioning and may be, at least partially, regulated by abscisic acid (ABA) concentrations. The studies reported here examine the relationship between carbon and ABA partitioning, reproductive abscission and ABA metabolism. The partitioning of radiolabeled ABA and photoassimilates from leaves to flowers and endogenous ABA concentrations were determined in shaded and unshaded reproductive structures. Aluminum foil was gently placed over individual soybean reproductive structures for 48 hours at 0, 4, 12, 17, and 22 days after anthesis (DAA). Shading of flowers at 12, 17, and 22 DAA resulted in significantly reduced concentration of ABA. However, shading had no effect on the catabolism of exogenously supplied [(3)H] ABA. The shading treatment on the first four of the five dates reduced partitioning of photoassimilates and ABA from the subtending leaf to the flower. Shading of reproductive structures also caused a significant reduction in the amount of assimilate exported from the subtending leaf, at 17 DAA. We conclude that shade-induced premature reproductive abscission in soybean is not stimulated by high levels of ABA within reproductive structures, but that ABA may inhibit abscission of reproductive structures by playing a role in preferential assimilate partitioning.
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Claims 7
Claim · model-written summary
Shading flowers at 12, 17, and 22 DAA significantly reduced ABA concentration.
- Taxon
- soybean
Glycine maxt0 - Organ / stage
- flowerse0
- Treatment
- Shading of flowerse0
- Outcome
- concentration of ABAe0
- Direction
- reducede0
- Qualifier
- 12, 17, and 22 DAAe0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Shading of flowers at 12, 17, and 22 DAA resulted in significantly reduced concentration of ABA.”
t0“Soybean”
Claim · model-written summary
Shading did not affect catabolism of exogenously supplied labeled ABA.
- Taxon
- soybeanGlycine maxt0
- Treatment
- shadinge0
- Outcome
- catabolism of exogenously supplied [(3)H] ABAe0
- Direction
- no effecte0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“shading had no effect on the catabolism of exogenously supplied [(3)H] ABA.”
t0“Soybean”
Claim · model-written summary
Shading on the first four dates reduced photoassimilate partitioning from the subtending leaf to the flower.
- Taxon
- soybeanGlycine maxt0
- Organ / stage
- flowere0
- Treatment
- shading treatmente0
- Outcome
- partitioning of photoassimilatese0
- Direction
- reducede0
- Qualifier
- first four of the five datese0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The shading treatment on the first four of the five dates reduced partitioning of photoassimilates and ABA from the subtending leaf to the flower.”
t0“Soybean”
Claim · model-written summary
Shading on the first four dates reduced ABA partitioning from the subtending leaf to the flower.
- Taxon
- soybeanGlycine maxt0
- Organ / stage
- flowere0
- Treatment
- shading treatmente0
- Outcome
- ABAe0
- Direction
- reducede0
- Qualifier
- first four of the five datese0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The shading treatment on the first four of the five dates reduced partitioning of photoassimilates and ABA from the subtending leaf to the flower.”
t0“Soybean”
Claim · model-written summary
Shading reproductive structures significantly reduced assimilate export from the subtending leaf at 17 DAA.
- Taxon
- soybeanGlycine maxt0
- Treatment
- Shading of reproductive structurese0
- Outcome
- amount of assimilate exported from the subtending leafe0
- Direction
- reductione0
- Qualifier
- at 17 DAAe0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Shading of reproductive structures also caused a significant reduction in the amount of assimilate exported from the subtending leaf, at 17 DAA.”
t0“Soybean”
Claim · model-written summary
The authors concluded that shade-induced premature reproductive abscission was not stimulated by high ABA within reproductive structures.
- Taxon
- soybeanGlycine maxe0
- Compound
- ABAe0
- Outcome
- premature reproductive abscissione0
- Qualifier
- not stimulated by high levels of ABAe0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“shade-induced premature reproductive abscission in soybean is not stimulated by high levels of ABA within reproductive structures”
Claim · model-written summary
The authors proposed that ABA may inhibit reproductive abscission through preferential assimilate partitioning.
- Taxon
- soybeanGlycine maxt0
- Compound
- ABAe0
- Outcome
- abscission of reproductive structurese0
- Qualifier
- preferential assimilate partitioninge0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“ABA may inhibit abscission of reproductive structures by playing a role in preferential assimilate partitioning.”
t0“Soybean”
The same questions in other papers
shade · molecular: metabolites · Glycine max (soybean)Positive and negative results
3 papers in the same direction as this paper · 6 in the opposite direction
- positive
- positive
- positive
6 papers more in this group
See all 10 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.