Abstract
The activity of mitochondria and the pectic enzymes, pectinesterase (PE) and polygalacturonase (PG), isolated from tomato fruit was inhibited by the addition of high concentrations of calcium ions. These effects could explain the complete inhibition of ripening of whole tomato fruit obtained when infiltrated with substantial amounts of calcium. The addition of lower concentrations of calcium were found to stimulate mitochondrial and PE activity, but PG activity at pH 4.5 was inhibited by concentrations greater than 10−7 M.
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Claims 6
Claim · model-written summary
High calcium concentrations inhibited activity of mitochondria isolated from tomato fruit.
- Taxon
- tomato
Solanum lycopersicume0 - Organ / stage
- fruite0
- Treatment
- high concentrations of calcium ionse0
- Outcome
- activity of mitochondriae0
- Direction
- inhibitede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The activity of mitochondria and the pectic enzymes, pectinesterase (PE) and polygalacturonase (PG), isolated from tomato fruit was inhibited by the addition of high concentrations of calcium ions.”
Claim · model-written summary
High calcium concentrations inhibited activity of pectinesterase and polygalacturonase isolated from tomato fruit.
- Taxon
- tomatoSolanum lycopersicume0
- Organ / stage
- fruite0
- Treatment
- high concentrations of calcium ionse0
- Gene
- pectinesterase (PE) and polygalacturonase (PG)e0
- Outcome
- activitye0
- Direction
- inhibitede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The activity of mitochondria and the pectic enzymes, pectinesterase (PE) and polygalacturonase (PG), isolated from tomato fruit was inhibited by the addition of high concentrations of calcium ions.”
Claim · model-written summary
Substantial calcium infiltration completely inhibited whole tomato fruit ripening.
- Taxon
- tomatoSolanum lycopersicume0
- Organ / stage
- whole tomato fruite0
- Treatment
- infiltrated with substantial amounts of calciume0
- Outcome
- ripening of whole tomato fruite0
- Direction
- complete inhibitione0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“complete inhibition of ripening of whole tomato fruit obtained when infiltrated with substantial amounts of calcium”
Claim · model-written summary
Lower calcium concentrations stimulated tomato fruit mitochondrial activity.
- Taxon
- tomatoSolanum lycopersicume1
- Treatment
- lower concentrations of calciume0
- Outcome
- mitochondriale0
- Direction
- stimulatee0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The addition of lower concentrations of calcium were found to stimulate mitochondrial and PE activity”
e1“isolated from tomato fruit”
Claim · model-written summary
Lower calcium concentrations stimulated tomato fruit pectinesterase activity.
- Taxon
- tomatoSolanum lycopersicume1
- Treatment
- lower concentrations of calciume0
- Gene
- PEe0
- Outcome
- PE activitye0
- Direction
- stimulatee0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The addition of lower concentrations of calcium were found to stimulate mitochondrial and PE activity”
e1“isolated from tomato fruit”
Claim · model-written summary
Calcium concentrations greater than 10−7 M inhibited polygalacturonase activity at pH 4.5.
- Taxon
- tomatoSolanum lycopersicume1
- Treatment
- concentrations greater than 10−7 Me0
- Gene
- PGe0
- Outcome
- PG activitye0
- Direction
- inhibitede0
- Qualifier
- pH 4.5e0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“PG activity at pH 4.5 was inhibited by concentrations greater than 10−7 M.”
e1“isolated from tomato fruit”
The same questions in other papers
calcium atom · quality: postharvest · Solanum lycopersicum (tomato)Results differ
10 papers in the same direction as this paper · 29 in the opposite direction
- positive
- positive
- positive
36 papers more in this group
See all 40 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.