Abstract
Abstract The effect of two levels each of N, P and K in factorial combination on the acidity and the individual non‐volatile organic acids in ethanolic extracts of whole, ripe tomato fruit has been studied. The concentrations of the two principal acids, citric and malic, were both significantly increased by high levels of K in the soil. Although the main effect of N was not significant, significant interactions between N and K were found with respect to both acids, and a significant interaction between N and P with respect to citric acid. Glutamic and aspartic acids and pyrrolidonecarboxylic acid (PCA) were all increased by N applications and decreased by phosphate. There was no significant main effect of K on glutamic acid concentrations, but aspartic acid and PCA were significantly decreased by high K levels in the soil. Changes in glutamic and aspartic acids were reflected in the total α‐amino‐N content; the highest concentrations were found where high N was combined with low phosphate. Addition of K decreased the total α‐amino‐N at the low, but not at the high level of N.
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Claims 10
Claim · model-written summary
High soil K significantly increased citric and malic acid concentrations in tomato fruit.
- Taxon
- tomato
Solanum lycopersicume0 - Treatment
- high levels of K in the soile1
- Compound
- citric and malice1
- Outcome
- concentrations of the two principal acidse1
- Direction
- increasede1
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“whole, ripe tomato fruit”
e1“The concentrations of the two principal acids, citric and malic, were both significantly increased by high levels of K in the soil”
Claim · model-written summary
Significant N and K interactions were found for both citric and malic acids in tomato fruit.
- Taxon
- tomatoSolanum lycopersicume0
- Treatment
- N and Ke1
- Outcome
- both acidse1
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“whole, ripe tomato fruit”
e1“significant interactions between N and K were found with respect to both acids”
Claim · model-written summary
A significant N and P interaction was found for citric acid in tomato fruit.
- Taxon
- tomatoSolanum lycopersicume0
- Treatment
- N and Pe2
- Outcome
- citric acide2
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“whole, ripe tomato fruit”
e2“a significant interaction between N and P with respect to citric acid”
Claim · model-written summary
Glutamic and aspartic acids and PCA were increased by N applications in tomato fruit.
- Taxon
- tomatoSolanum lycopersicume0
- Treatment
- N applicationse3
- Outcome
- Glutamic and aspartic acids and pyrrolidonecarboxylic acid (PCA)e3
- Direction
- increasede3
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“whole, ripe tomato fruit”
e3“Glutamic and aspartic acids and pyrrolidonecarboxylic acid (PCA) were all increased by N applications and decreased by phosphate”
Claim · model-written summary
Glutamic and aspartic acids and PCA were decreased by phosphate in tomato fruit.
- Taxon
- tomatoSolanum lycopersicume0
- Treatment
- phosphatee3
- Outcome
- Glutamic and aspartic acids and pyrrolidonecarboxylic acid (PCA)e3
- Direction
- decreasede3
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“whole, ripe tomato fruit”
e3“Glutamic and aspartic acids and pyrrolidonecarboxylic acid (PCA) were all increased by N applications and decreased by phosphate”
Claim · model-written summary
High K had no significant main effect on glutamic acid concentrations in tomato fruit.
- Taxon
- tomatoSolanum lycopersicume0
- Treatment
- Ke4
- Outcome
- glutamic acid concentrationse4
Not reportedComparatorDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“whole, ripe tomato fruit”
e4“There was no significant main effect of K on glutamic acid concentrations, but aspartic acid and PCA were significantly decreased by high K levels in the soil”
Claim · model-written summary
High K levels in the soil significantly decreased aspartic acid and PCA in tomato fruit.
- Taxon
- tomatoSolanum lycopersicume0
- Treatment
- high K levels in the soile4
- Outcome
- aspartic acid and PCAe4
- Direction
- decreasede4
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“whole, ripe tomato fruit”
e4“There was no significant main effect of K on glutamic acid concentrations, but aspartic acid and PCA were significantly decreased by high K levels in the soil”
Claim · model-written summary
Changes in glutamic and aspartic acids were reflected in total α‐amino‐N content of tomato fruit.
- Taxon
- tomatoSolanum lycopersicume0
- Treatment
- glutamic and aspartic acidse5
- Outcome
- total α‐amino‐N contente5
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“whole, ripe tomato fruit”
e5“Changes in glutamic and aspartic acids were reflected in the total α‐amino‐N content”
Claim · model-written summary
Total α‐amino‐N concentrations were highest where high N was combined with low phosphate in tomato fruit.
- Taxon
- tomatoSolanum lycopersicume0
- Treatment
- high Ne7
- Outcome
- concentrationse7
- Direction
- higheste7
- Qualifier
- low phosphatee7
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“whole, ripe tomato fruit”
e7“the highest concentrations were found where high N was combined with low phosphate”
Claim · model-written summary
Adding K decreased total α‐amino‐N at the low N level but not at the high N level in tomato fruit.
- Taxon
- tomatoSolanum lycopersicume0
- Treatment
- Addition of Ke6
- Outcome
- total α‐amino‐Ne6
- Direction
- decreasede6
- Qualifier
- at the low, but not at the high level of Ne6
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“whole, ripe tomato fruit”
e6“Addition of K decreased the total α‐amino‐N at the low, but not at the high level of N”
The same questions in other papers
potassium · molecular: metabolites · Solanum lycopersicum (tomato)Positive and negative results
5 papers in the same direction as this paper · 12 in the opposite direction
- positive
- positive
- positive
14 papers more in this group
See all 18 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.