Abstract
Abstract ‘Elberta’ and ‘Lovell’ peach seedlings ( Prunus persica (L.) Batsch) were grown in nutrient solutions for 36 days with 0.8, 2.5, 7.5, 22.5, 67.5, and 202.5 μ M Ca. At 0.8 μ M Ca root growth was reduced, roots became brown, appeared gelatinous, and decayed before any foliar Ca deficiency symptoms developed. The Ca concentration in the external solution increased from 0.8 μ M to 4.5 μ M Ca due to exchange of previously adsorbed Ca and efflux of Ca from the roots. Leaves wilted severely within 24 hrs and plants began to defoliate 5 days after initiating the 0.8 μ M Ca treatment. Calcium deficiency symptoms in 2.5 μ M Ca developed in the leaves as marginal chlorosis followed by necrosis that spread to the leaf apexes. Shoot tips died on some peach seedlings. Roots in 2.5 μ M Ca died back severely and little regrowth occurred. Elongation of main and secondary roots was restricted and roots that developed were swollen and stubby. Reduced root growth was the only indication of Ca deficiency in seedlings grown in 7.5 μ M Ca. No Ca deficiency symptoms appeared on seedlings grown in Ca concentrations greater than 7.5 μ M.
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Claims 11
Claim · model-written summary
Ca at 0.8 μM reduced root growth of peach seedlings.
- Taxon
- peach seedlings
Prunus persicae0 - Treatment
- 0.8 μ M Cae1
- Outcome
- root growthe1
- Direction
- reducede1
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“peach seedlings ( Prunus persica (L.) Batsch)”
e1“At 0.8 μ M Ca root growth was reduced, roots became brown, appeared gelatinous, and decayed before any foliar Ca deficiency symptoms developed”
Claim · model-written summary
Ca at 0.8 μM made roots brown, gelatinous and decayed before foliar Ca deficiency symptoms developed.
- Taxon
- peach seedlingsPrunus persicae0
- Treatment
- 0.8 μ M Cae1
- Outcome
- roots became brown, appeared gelatinous, and decayede1
Not reportedComparatorDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“peach seedlings ( Prunus persica (L.) Batsch)”
e1“At 0.8 μ M Ca root growth was reduced, roots became brown, appeared gelatinous, and decayed before any foliar Ca deficiency symptoms developed”
Claim · model-written summary
Ca at 0.8 μM caused peach leaves to wilt severely within 24 hours.
- Taxon
- peach seedlingsPrunus persicae0
- Treatment
- 0.8 μ M Cae1
- Outcome
- Leaves wilted severely within 24 hrse1
Not reportedComparatorDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“peach seedlings ( Prunus persica (L.) Batsch)”
e1“Leaves wilted severely within 24 hrs and plants began to defoliate 5 days after initiating the 0.8 μ M Ca treatment”
Claim · model-written summary
Ca at 0.8 μM made peach seedlings begin to defoliate 5 days after treatment started.
- Taxon
- peach seedlingsPrunus persicae0
- Treatment
- 0.8 μ M Cae1
- Outcome
- plants began to defoliatee1
- Qualifier
- 5 days after initiatinge1
Not reportedComparatorDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“peach seedlings ( Prunus persica (L.) Batsch)”
e1“Leaves wilted severely within 24 hrs and plants began to defoliate 5 days after initiating the 0.8 μ M Ca treatment”
Claim · model-written summary
Ca at 2.5 μM caused Ca deficiency symptoms in leaves as marginal chlorosis followed by necrosis.
- Taxon
- peach seedlingsPrunus persicae0
- Organ / stage
- leavese1
- Treatment
- 2.5 μ M Cae1
- Outcome
- Calcium deficiency symptomse1
- Qualifier
- marginal chlorosis followed by necrosise1
Not reportedComparatorDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“peach seedlings ( Prunus persica (L.) Batsch)”
e1“Calcium deficiency symptoms in 2.5 μ M Ca developed in the leaves as marginal chlorosis followed by necrosis that spread to the leaf apexes”
Claim · model-written summary
Ca at 2.5 μM made roots die back severely with little regrowth.
- Taxon
- peach seedlingsPrunus persicae0
- Organ / stage
- Rootse1
- Treatment
- 2.5 μ M Cae1
- Outcome
- died back severelye1
- Qualifier
- little regrowth occurrede1
Not reportedComparatorDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“peach seedlings ( Prunus persica (L.) Batsch)”
e1“Roots in 2.5 μ M Ca died back severely and little regrowth occurred”
Claim · model-written summary
Ca at 2.5 μM restricted elongation of main and secondary roots, which were swollen and stubby.
- Taxon
- peach seedlingsPrunus persicae0
- Treatment
- 2.5 μ M Cae1
- Outcome
- Elongation of main and secondary rootse2
- Direction
- restrictede2
- Qualifier
- swollen and stubbye2
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“peach seedlings ( Prunus persica (L.) Batsch)”
e1“Roots in 2.5 μ M Ca died back severely and little regrowth occurred”
e2“Elongation of main and secondary roots was restricted and roots that developed were swollen and stubby”
Claim · model-written summary
Ca at 7.5 μM reduced root growth, the only sign of Ca deficiency.
- Taxon
- peach seedlingsPrunus persicae0
- Treatment
- 7.5 μ M Cae1
- Outcome
- root growthe1
- Direction
- Reducede1
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“peach seedlings ( Prunus persica (L.) Batsch)”
e1“Reduced root growth was the only indication of Ca deficiency in seedlings grown in 7.5 μ M Ca”
Claim · model-written summary
Ca above 7.5 μM produced no Ca deficiency symptoms in peach seedlings.
- Taxon
- peach seedlingsPrunus persicae0
- Treatment
- Ca concentrations greater than 7.5 μ Me1
- Outcome
- Ca deficiency symptomse1
Not reportedComparatorDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“peach seedlings ( Prunus persica (L.) Batsch)”
e1“No Ca deficiency symptoms appeared on seedlings grown in Ca concentrations greater than 7.5 μ M”
Claim · model-written summary
The Ca concentration in the external solution increased from 0.8 μM to 4.5 μM.
- Taxon
- peach seedlingsPrunus persicae0
- Outcome
- Ca concentration in the external solutione1
- Direction
- increasede1
- Value
- 4.5 μ Me1
- Qualifier
- due to exchange of previously adsorbed Ca and efflux of Ca from the rootse1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“peach seedlings ( Prunus persica (L.) Batsch)”
e1“The Ca concentration in the external solution increased from 0.8 μ M to 4.5 μ M Ca due to exchange of previously adsorbed Ca and efflux of Ca from the roots”
Claim · model-written summary
Shoot tips died on some peach seedlings.
- Taxon
- peach seedlingsPrunus persicae0
- Outcome
- Shoot tips diede1
- Qualifier
- on some peach seedlingse1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“peach seedlings ( Prunus persica (L.) Batsch)”
e1“Shoot tips died on some peach seedlings”
The same questions in other papers
calcium atom · disease · Prunus persica (peach)Results differ
2 papers in the same direction as this paper · 8 in the opposite direction
- positive
- positive
- positive
7 papers more in this group
See all 11 papers →calcium atom · growth · Prunus persica (peach)Positive and negative results
3 papers in the same direction as this paper · 2 in the opposite direction
- no effect
- positive
- positive
2 papers more in this group
See all 6 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.