Abstract
Flower abscission is accompanied by a marked increase in polygalacturonase (PG), an enzyme responsible for degradation of the middle lamella, and a subsequent reduction in the abscission zone (AZ) break strength. Calcium (Ca) is reported to bind polygalacturonan to form 'egg-box' complexes that effectively inhibit organ abscis- sion. The results obtained from our experiments showed that an 80 mM Ca concentration was most effective in delaying tomato pedicel explants abscission. During abscission, Ca did not suppress increases in endo-PG activity, or change PG mRNA expression and protein accumulation in the abscission zone. In contrast, using ethylene glycol tetraacetic acid (EGTA), verapamil (VP) and trifluoperazine (TFP) treating pedicel explants would accelerate the abscission. Moreover, EGTA, VP and TFP treatments enhanced endo-PG activity and changed PG mRNA expression and protein accumulation timing in the AZ. The results of this study suggest that Ca delays tomato pedicel explants abscission by mediating PG activity at both the transcriptional and translational levels.
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Claims 13
Claim · model-written summary
An 80 mM Ca concentration was most effective in delaying pedicel explant abscission in tomato.
- Taxon
- tomato
Solanum lycopersicume1 - Organ / stage
- pedicel explantse1
- Treatment
- 80 mM Ca concentratione1
- Outcome
- pedicel explants abscissione1
- Direction
- most effectivee1
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“an 80 mM Ca concentration was most effective in delaying tomato pedicel explants abscission”
Claim · model-written summary
Ca did not suppress increases in endo-PG activity during abscission in tomato pedicel explants.
- Taxon
- tomatoSolanum lycopersicume1
- Treatment
- Cae2
- Gene
- endo-PGe2
- Outcome
- endo-PG activitye2
- Direction
- no_changeinferrede2
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“an 80 mM Ca concentration was most effective in delaying tomato pedicel explants abscission”
e2“Ca did not suppress increases in endo-PG activity”
Claim · model-written summary
Ca did not change PG mRNA expression or protein accumulation in the abscission zone.
- Taxon
- tomatoSolanum lycopersicume1
- Organ / stage
- abscission zonee2
- Treatment
- Cae2
- Gene
- PGe2
- Outcome
- PG mRNA expression and protein accumulatione2
- Direction
- no_changeinferrede2
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“an 80 mM Ca concentration was most effective in delaying tomato pedicel explants abscission”
e2“During abscission, Ca did not suppress increases in endo-PG activity, or change PG mRNA expression and protein accumulation in the abscission zone”
Claim · model-written summary
EGTA accelerated abscission of tomato pedicel explants.
- Taxon
- tomatoSolanum lycopersicume1
- Organ / stage
- pedicel explantse2
- Treatment
- EGTAe2
- Outcome
- abscissione2
- Direction
- acceleratee2
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“an 80 mM Ca concentration was most effective in delaying tomato pedicel explants abscission”
e2“In contrast, using ethylene glycol tetraacetic acid (EGTA), verapamil (VP) and trifluoperazine (TFP) treating pedicel explants would accelerate the abscission”
Claim · model-written summary
Verapamil accelerated abscission of tomato pedicel explants.
- Taxon
- tomatoSolanum lycopersicume1
- Organ / stage
- pedicel explantse2
- Treatment
- verapamil (VP)e2
- Outcome
- abscissione2
- Direction
- acceleratee2
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“an 80 mM Ca concentration was most effective in delaying tomato pedicel explants abscission”
e2“In contrast, using ethylene glycol tetraacetic acid (EGTA), verapamil (VP) and trifluoperazine (TFP) treating pedicel explants would accelerate the abscission”
Claim · model-written summary
Trifluoperazine accelerated abscission of tomato pedicel explants.
- Taxon
- tomatoSolanum lycopersicume1
- Organ / stage
- pedicel explantse2
- Treatment
- trifluoperazine (TFP)e2
- Outcome
- abscissione2
- Direction
- acceleratee2
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“an 80 mM Ca concentration was most effective in delaying tomato pedicel explants abscission”
e2“In contrast, using ethylene glycol tetraacetic acid (EGTA), verapamil (VP) and trifluoperazine (TFP) treating pedicel explants would accelerate the abscission”
Claim · model-written summary
EGTA enhanced endo-PG activity in tomato pedicel explants.
- Taxon
- tomatoSolanum lycopersicume1
- Treatment
- EGTAe2
- Gene
- endo-PGe2
- Outcome
- endo-PG activitye2
- Direction
- enhancede2
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“an 80 mM Ca concentration was most effective in delaying tomato pedicel explants abscission”
e2“Moreover, EGTA, VP and TFP treatments enhanced endo-PG activity and changed PG mRNA expression and protein accumulation timing in the AZ”
Claim · model-written summary
VP enhanced endo-PG activity in tomato pedicel explants.
- Taxon
- tomatoSolanum lycopersicume1
- Treatment
- VPe2
- Gene
- endo-PGe2
- Outcome
- endo-PG activitye2
- Direction
- enhancede2
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“an 80 mM Ca concentration was most effective in delaying tomato pedicel explants abscission”
e2“Moreover, EGTA, VP and TFP treatments enhanced endo-PG activity and changed PG mRNA expression and protein accumulation timing in the AZ”
Claim · model-written summary
TFP enhanced endo-PG activity in tomato pedicel explants.
- Taxon
- tomatoSolanum lycopersicume1
- Treatment
- TFPe2
- Gene
- endo-PGe2
- Outcome
- endo-PG activitye2
- Direction
- enhancede2
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“an 80 mM Ca concentration was most effective in delaying tomato pedicel explants abscission”
e2“Moreover, EGTA, VP and TFP treatments enhanced endo-PG activity and changed PG mRNA expression and protein accumulation timing in the AZ”
Claim · model-written summary
EGTA changed the timing of PG mRNA expression and protein accumulation in the abscission zone of tomato.
- Taxon
- tomatoSolanum lycopersicume1
- Organ / stage
- AZe2
- Treatment
- EGTAe2
- Gene
- PGe2
- Outcome
- PG mRNA expression and protein accumulation timinge2
- Direction
- changede2
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“an 80 mM Ca concentration was most effective in delaying tomato pedicel explants abscission”
e2“Moreover, EGTA, VP and TFP treatments enhanced endo-PG activity and changed PG mRNA expression and protein accumulation timing in the AZ”
Claim · model-written summary
VP changed the timing of PG mRNA expression and protein accumulation in the abscission zone of tomato.
- Taxon
- tomatoSolanum lycopersicume1
- Organ / stage
- AZe2
- Treatment
- VPe2
- Gene
- PGe2
- Outcome
- PG mRNA expression and protein accumulation timinge2
- Direction
- changede2
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“an 80 mM Ca concentration was most effective in delaying tomato pedicel explants abscission”
e2“Moreover, EGTA, VP and TFP treatments enhanced endo-PG activity and changed PG mRNA expression and protein accumulation timing in the AZ”
Claim · model-written summary
TFP changed the timing of PG mRNA expression and protein accumulation in the abscission zone of tomato.
- Taxon
- tomatoSolanum lycopersicume1
- Organ / stage
- AZe2
- Treatment
- TFPe2
- Gene
- PGe2
- Outcome
- PG mRNA expression and protein accumulation timinge2
- Direction
- changede2
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“an 80 mM Ca concentration was most effective in delaying tomato pedicel explants abscission”
e2“Moreover, EGTA, VP and TFP treatments enhanced endo-PG activity and changed PG mRNA expression and protein accumulation timing in the AZ”
Claim · model-written summary
Calcium delays tomato pedicel explant abscission by mediating PG activity at transcriptional and translational levels.
- Taxon
- tomatoSolanum lycopersicume1
- Treatment
- Cae1
- Gene
- PGe1
- Outcome
- pedicel explants abscissione1
- Qualifier
- at both the transcriptional and translational levelse1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“Ca delays tomato pedicel explants abscission by mediating PG activity at both the transcriptional and translational levels”
The same questions in other papers
calcium atom · yield · Solanum lycopersicum (tomato)Results differ
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- negative
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- negative
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2 papers in the same direction as this paper · 5 in the opposite direction
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See all 8 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.