Abstract
Ethylene biosynthesis in leaf discs of tobacco ( Nicotiana tabacum L. cv. Xanthi), as measured by the conversion of L‐[3,4‐ 14 C]‐methionine to 14 C 2 H 4 , was markedly inhibited by exogenous ethylene. This inhibition was accompanied by a decrease in total (free + conjugated) content of 1‐aminocyclopropane‐1‐carboxylic acid (ACC), most of which appeared in its conjugated inactive form. The autoinhibitory effect of ethylene was reversible and could be relieved by Ag + . The Ag + ‐treated leaf discs, with or without ethylene, contained only free ACC at an increased level. The results suggest that in tobacco leaves, the autoinhibition of ethylene production resulted from reduction in the availability of free ACC, through both suppression of ACC formation and increased ACC conjugation.
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Claims 6
Claim · model-written summary
Exogenous ethylene markedly inhibited ethylene biosynthesis.
- Taxon
- tobacco
Nicotiana tabacume0 - Material
- Nicotiana tabacum L. cv. Xanthie0
- Organ / stage
- leaf discse0
- Treatment
- exogenous ethylenee0
- Outcome
- Ethylene biosynthesise0
- Direction
- markedly inhibitede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Ethylene biosynthesis in leaf discs of tobacco ( Nicotiana tabacum L. cv. Xanthi), as measured by the conversion of L‐[3,4‐ 14 C]‐methionine to 14 C 2 H 4 , was markedly inhibited by exogenous ethylene.”
Claim · model-written summary
Ethylene inhibition accompanied decreased total ACC content.
- Taxon
- tobaccoNicotiana tabacume1
- Organ / stage
- leaf discse1
- Treatment
- inhibitione0
- Outcome
- total (free + conjugated) content of 1‐aminocyclopropane‐1‐carboxylic acid (ACC)e0
- Direction
- decreasee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“This inhibition was accompanied by a decrease in total (free + conjugated) content of 1‐aminocyclopropane‐1‐carboxylic acid (ACC)”
e1“leaf discs of tobacco”
Claim · model-written summary
Most ACC appeared in a conjugated inactive form.
- Taxon
- tobaccoNicotiana tabacume2
- Organ / stage
- leaf discse2
- Outcome
- 1‐aminocyclopropane‐1‐carboxylic acid (ACC)e1
- Qualifier
- conjugated inactive forme0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“most of which appeared in its conjugated inactive form”
e1“1‐aminocyclopropane‐1‐carboxylic acid (ACC)”
e2“leaf discs of tobacco”
Claim · model-written summary
Ethylene autoinhibition was reversible and relieved by Ag +.
- Taxon
- tobaccoNicotiana tabacume1
- Treatment
- Ag +e0
- Outcome
- autoinhibitory effect of ethylenee0
- Direction
- relievede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The autoinhibitory effect of ethylene was reversible and could be relieved by Ag +”
e1“leaf discs of tobacco”
Claim · model-written summary
Ag + treated leaf discs contained only free ACC at an increased level, regardless of ethylene.
- Taxon
- tobaccoNicotiana tabacume1
- Organ / stage
- leaf discse0
- Treatment
- Ag +e0
- Outcome
- free ACCe0
- Direction
- increasede0
- Qualifier
- with or without ethylenee0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The Ag + ‐treated leaf discs, with or without ethylene, contained only free ACC at an increased level.”
e1“leaf discs of tobacco”
Claim · model-written summary
Authors attribute ethylene autoinhibition to less free ACC from suppressed formation and enhanced conjugation.
- Taxon
- tobaccoNicotiana tabacume1
- Outcome
- autoinhibition of ethylene productione0
- Qualifier
- suppression of ACC formation and increased ACC conjugatione0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the autoinhibition of ethylene production resulted from reduction in the availability of free ACC, through both suppression of ACC formation and increased ACC conjugation”
e1“tobacco leaves”
The same questions in other papers
ethene · physiology: hormones · Nicotiana tabacum (tobacco)Results differ
3 papers in the same direction as this paper · 4 in the opposite direction
- positive
- no effect
- positive
4 papers more in this group
See all 8 papers →silver atom · physiology: hormones · Nicotiana tabacum (tobacco)Results agree
1 paper in the same direction as this paper
- positive
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.