Abstract
Ethylene production in apple fruit and protoplasts and in leaf tissue was inhibited by spermidine or spermine. These polyamines, as well as putrescine, inhibited auxin-induced ethylene production and the conversion of methionine and 1-aminocyclopropane-1-carboxylic acid to ethylene. Polyamines were more effective as inhibitors of ethylene synthesis at the early, rather than at the late, stages of fruit ripening. Ca(2+) in the incubation medium reduced the inhibitory effect caused by the amines. A possible mode of action by which polyamines inhibit ethylene production is discussed.
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Claims 5
Claim · model-written summary
Spermidine or spermine inhibited ethylene production in apple fruit, protoplasts and leaf tissue.
- Taxon
- apple
Malus domesticae0 - Organ / stage
- fruit and protoplasts and in leaf tissuee0
- Treatment
- spermidine or sperminee0
- Outcome
- Ethylene productione0
- Direction
- inhibitede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Ethylene production in apple fruit and protoplasts and in leaf tissue was inhibited by spermidine or spermine.”
Claim · model-written summary
Polyamines inhibited auxin-induced ethylene production.
- Taxon
- Higher Plantt0
- Treatment
- These polyamines, as well as putrescinee0
- Outcome
- auxin-induced ethylene productione0
- Direction
- inhibitede0
Not reportedComparator
Verbatim
t0“Higher Plant Tissue and Fruit Protoplasts”
e0“These polyamines, as well as putrescine, inhibited auxin-induced ethylene production”
Claim · model-written summary
Polyamines inhibited conversion of methionine and 1-aminocyclopropane-1-carboxylic acid to ethylene.
- Taxon
- Higher Plantt0
- Treatment
- These polyamines, as well as putrescinee0
- Outcome
- conversion of methionine and 1-aminocyclopropane-1-carboxylic acid to ethylenee0
- Direction
- inhibitede0
Not reportedComparator
Verbatim
t0“Higher Plant Tissue and Fruit Protoplasts”
e0“These polyamines, as well as putrescine, inhibited auxin-induced ethylene production and the conversion of methionine and 1-aminocyclopropane-1-carboxylic acid to ethylene.”
Claim · model-written summary
Polyamines inhibited ethylene synthesis more effectively at early than late fruit ripening stages.
Verbatim
t0“Higher Plant Tissue and Fruit Protoplasts”
e0“Polyamines were more effective as inhibitors of ethylene synthesis at the early, rather than at the late, stages of fruit ripening.”
Claim · model-written summary
Calcium in the incubation medium reduced the inhibitory effect of polyamines.
- Taxon
- Higher Plantt0
- Treatment
- Ca(2+)e0
- Outcome
- inhibitory effect caused by the aminese0
- Direction
- reducede0
Not reportedComparator
Verbatim
t0“Higher Plant Tissue and Fruit Protoplasts”
e0“Ca(2+) in the incubation medium reduced the inhibitory effect caused by the amines.”
The same questions in other papers
spermine · physiology: hormones · Malus domestica (apple)Results agree
1 paper in the same direction as this paper
- negative
spermidine · physiology: hormones · Malus domestica (apple)Results agree
2 papers in the same direction as this paper
- no effect
- no effect
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.