Abstract
Cellulysin-induced ethylene production in tobacco (Nicotiana tabacum L.) leaf discs was enhanced several-fold by prior exposure of the leaf tissue to ethylene. This enhancement in the response of the tissue to Cellulysin increased rapidly during 4 and 8 hours of pretreatment with ethylene and resulted from greater conversion of methionine to ethylene. On treatment with Cellulysin, the content of 1-aminocyclopropane-1-carboxylic acid (ACC) in leaf discs not pretreated with ethylene markedly increased while that of the ethylene-pretreated tissue was only slightly higher than in the tissue incubated in the absence of Cellulysin. Ethylene-treated tissue, however, converted ACC to ethylene at a faster rate than air controls. These data indicate that ethylene stimulates Cellulysin-induced ethylene production by stimulating the conversion of ACC to ethylene. Data are also presented on a possible relation of this phenomenon to ethylene produced by the tobacco leaf upon interaction with its pathogen, Alternaria alternata.
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Claims 7
Claim · model-written summary
Prior ethylene exposure enhanced Cellulysin-induced ethylene production in tobacco leaf discs several-fold.
- Taxon
- tobacco
Nicotiana tabacume0 - Organ / stage
- leaf discse0
- Treatment
- prior exposure of the leaf tissue to ethylenee0
- Outcome
- Cellulysin-induced ethylene productione0
- Direction
- enhancede0
- Value
- several-folde0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Cellulysin-induced ethylene production in tobacco (Nicotiana tabacum L.) leaf discs was enhanced several-fold by prior exposure of the leaf tissue to ethylene.”
Claim · model-written summary
The enhancement increased rapidly during 4 and 8 hours of ethylene pretreatment.
- Taxon
- TobaccoNicotiana tabacumt0
- Treatment
- pretreatment with ethylenee0
- Outcome
- enhancement in the response of the tissue to Cellulysine0
- Direction
- increased rapidlye0
- Value
- 4 and 8 hourse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“This enhancement in the response of the tissue to Cellulysin increased rapidly during 4 and 8 hours of pretreatment with ethylene”
t0“Tobacco Leaf Discs”
Claim · model-written summary
Ethylene pretreatment increased conversion of methionine to ethylene.
- Taxon
- TobaccoNicotiana tabacumt0
- Treatment
- pretreatment with ethylenee1
- Outcome
- conversion of methionine to ethylenee0
- Direction
- greatere0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“resulted from greater conversion of methionine to ethylene”
e1“pretreatment with ethylene”
t0“Tobacco Leaf Discs”
Claim · model-written summary
Cellulysin markedly increased ACC content in leaf discs without ethylene pretreatment.
- Taxon
- TobaccoNicotiana tabacumt0
- Organ / stage
- leaf discse0
- Treatment
- Cellulysine0
- Outcome
- content of 1-aminocyclopropane-1-carboxylic acid (ACC)e0
- Direction
- markedly increasede0
- Comparator
- not pretreated with ethylenee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“On treatment with Cellulysin, the content of 1-aminocyclopropane-1-carboxylic acid (ACC) in leaf discs not pretreated with ethylene markedly increased”
t0“Tobacco Leaf Discs”
Claim · model-written summary
With Cellulysin, ACC content in ethylene-pretreated leaf tissue was only slightly above tissue without Cellulysin.
- Taxon
- TobaccoNicotiana tabacumt0
- Treatment
- Cellulysine0
- Outcome
- content of 1-aminocyclopropane-1-carboxylic acid (ACC)e1
- Direction
- slightly highere0
- Qualifier
- ethylene-pretreated tissuee0
- Comparator
- the tissue incubated in the absence of Cellulysine0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“that of the ethylene-pretreated tissue was only slightly higher than in the tissue incubated in the absence of Cellulysin”
e1“the content of 1-aminocyclopropane-1-carboxylic acid (ACC)”
t0“Tobacco Leaf Discs”
Claim · model-written summary
Ethylene-treated tobacco leaf tissue converted ACC to ethylene faster than air controls.
- Taxon
- TobaccoNicotiana tabacumt0
- Treatment
- Ethylene-treatede0
- Outcome
- converted ACC to ethylenee0
- Direction
- fastere0
- Comparator
- air controlse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Ethylene-treated tissue, however, converted ACC to ethylene at a faster rate than air controls.”
t0“Tobacco Leaf Discs”
Claim · model-written summary
The authors attribute stimulation of Cellulysin-induced ethylene production to increased conversion of ACC to ethylene.
- Taxon
- TobaccoNicotiana tabacumt0
- Outcome
- Cellulysin-induced ethylene productione0
- Qualifier
- conversion of ACC to ethylenee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“ethylene stimulates Cellulysin-induced ethylene production by stimulating the conversion of ACC to ethylene”
t0“Tobacco Leaf Discs”
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
- no effect
- negative
- negative
4 papers more in this group
See all 8 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.