Abstract
Mature-green tomato fruit (Lycopersicon esculentum Mill.) were treated asymmetrically with 2 millimolar silver thiosulfate (STS) through a cut portion of the peduncle while still attached to the plant. One-half of the fruit received silver and remained green while the other half ripened normally and was silver-free (less than 0.01 parts per billion). Harvested mature-green fruit were also treated with STS through the cut pedicel. Green tissue from silver-treated fruit had levels of 1-aminocyclopropane-1-carboxylic acid (ACC, the immediate ethylene precursor) slightly less or similar to that of turning or red-ripe tissue from the same fruit, and similar to that of mature-green tissue from control fruit. Ethylene production was higher in green tissue from silver-treated fruit than from either red tissue from the same fruit, or mature-green tissue from control fruit. By inhibiting ACC synthesis with aminoethoxyvinyl glycine, and by applying ACC +/- silver to excised disks of pericarp tissue from control or silver-treated tomatoes, we showed that short-term silver treatment did not affect the biological conversion of ACC to ethylene, while long-term treatment stimulated both the conversion of ACC to ethylene and the synthesis of ACC.
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The text the model read, with the source record’s inline markup (italics, sub- and superscripts) rendered and its character entities decoded; quote offsets refer to the raw text.
Claims 7
Claim · model-written summary
The silver-treated half of attached tomato fruit remained green while the silver-free half ripened.
- Taxon
- tomato
Solanum lycopersicume0 - Organ / stage
- fruite0
- Treatment
- 2 millimolar silver thiosulfate (STS)e0
- Outcome
- remained greene0
- Qualifier
- silver-free (less than 0.01 parts per billion)e0
- Comparator
- other halfe0
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Mature-green tomato fruit (Lycopersicon esculentum Mill.) were treated asymmetrically with 2 millimolar silver thiosulfate (STS) through a cut portion of the peduncle while still attached to the plant. One-half of the fruit received silver and remained green while the other half ripened normally and was silver-free (less than 0.01 parts per billion).”
Claim · model-written summary
ACC levels in green silver-treated tissue were slightly less than or similar to turning or red-ripe tissue and similar to green control tissue.
- Taxon
- TomatoSolanum lycopersicumt0
- Treatment
- silver-treatede0
- Outcome
- levels of 1-aminocyclopropane-1-carboxylic acide0
- Direction
- slightly less or similare0
- Comparator
- turning or red-ripe tissue from the same fruite0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Green tissue from silver-treated fruit had levels of 1-aminocyclopropane-1-carboxylic acid (ACC, the immediate ethylene precursor) slightly less or similar to that of turning or red-ripe tissue from the same fruit, and similar to that of mature-green tissue from control fruit.”
t0“Tomato Fruit Tissue”
Claim · model-written summary
Ethylene production was higher in green silver-treated tissue than red tissue from the same fruit.
- Taxon
- TomatoSolanum lycopersicumt0
- Treatment
- silver-treatede0
- Outcome
- Ethylene productione0
- Direction
- highere0
- Comparator
- red tissue from the same fruite0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Ethylene production was higher in green tissue from silver-treated fruit than from either red tissue from the same fruit, or mature-green tissue from control fruit.”
t0“Tomato Fruit Tissue”
Claim · model-written summary
Ethylene production was higher in green silver-treated tissue than green control tissue.
- Taxon
- TomatoSolanum lycopersicumt0
- Treatment
- silver-treatede0
- Outcome
- Ethylene productione0
- Direction
- highere0
- Comparator
- mature-green tissue from control fruite0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Ethylene production was higher in green tissue from silver-treated fruit than from either red tissue from the same fruit, or mature-green tissue from control fruit.”
t0“Tomato Fruit Tissue”
Claim · model-written summary
Short-term silver treatment did not affect ACC-to-ethylene conversion.
- Taxon
- TomatoSolanum lycopersicumt0
- Treatment
- short-term silver treatmente0
- Outcome
- biological conversion of ACC to ethylenee0
- Direction
- did not affecte0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“short-term silver treatment did not affect the biological conversion of ACC to ethylene”
t0“Tomato Fruit Tissue”
Claim · model-written summary
Long-term silver treatment stimulated ACC-to-ethylene conversion.
- Taxon
- TomatoSolanum lycopersicumt0
- Treatment
- long-term treatmente0
- Outcome
- conversion of ACC to ethylenee0
- Direction
- stimulatede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“long-term treatment stimulated both the conversion of ACC to ethylene and the synthesis of ACC.”
t0“Tomato Fruit Tissue”
Claim · model-written summary
Long-term silver treatment stimulated ACC synthesis.
- Taxon
- TomatoSolanum lycopersicumt0
- Treatment
- long-term treatmente0
- Outcome
- synthesis of ACCe0
- Direction
- stimulatede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“long-term treatment stimulated both the conversion of ACC to ethylene and the synthesis of ACC.”
t0“Tomato Fruit Tissue”
The same questions in other papers
silver atom · physiology: hormones · Solanum lycopersicum (tomato)Positive and negative results
4 papers in the same direction as this paper · 2 in the opposite direction
- negative
- positive
- positive
3 papers more in this group
See all 7 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.