Abstract
Exposing etiolated pea seedlings to ethylene which inhibited the activity of arginine decarboxylase and S-adenosylmethionine decarboxylase caused an increase in the level of cadaverine. The elevated level of cadaverine resulted from an increase in lysine decarboxylase activity in the tissue exposed to ethylene. The hormone did not affect the apparent K(m) of the enzyme, but the apparent V(max) was increased by 96%. While lysine decarboxylase activity in the ethylene-treated plants increased in both the meristematic and the elongation zone tissue, cadaverine accumulation was observed in the latter only. The enhancement by ethylene of the enzyme activity was reversed completely 24 hours after transferring the plants to an ethylene-free atmosphere. It is postulated that the increase in lysine decarboxylase activity, and the consequent accumulation of cadaverine in ethylene-treated plants, is of a compensatory nature as a response to the inhibition of arginine and S-adenosylmethionine decarboxylase activity provoked by ethylene.
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Claims 11
Claim · model-written summary
Ethylene inhibited arginine decarboxylase activity.
- Taxon
- Pea Seedlings
Lathyrus oleraceust0 - Treatment
- ethylenee0
- Gene
- arginine decarboxylasee0
- Outcome
- activity of arginine decarboxylasee0
- Direction
- inhibitede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Pea Seedlings”
e0“ethylene which inhibited the activity of arginine decarboxylase and S-adenosylmethionine decarboxylase”
Claim · model-written summary
Ethylene inhibited S-adenosylmethionine decarboxylase activity.
- Taxon
- Pea SeedlingsLathyrus oleraceust0
- Treatment
- ethylenee0
- Gene
- S-adenosylmethionine decarboxylasee0
- Outcome
- activity of arginine decarboxylase and S-adenosylmethionine decarboxylasee0
- Direction
- inhibitede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Pea Seedlings”
e0“ethylene which inhibited the activity of arginine decarboxylase and S-adenosylmethionine decarboxylase”
Claim · model-written summary
Ethylene increased cadaverine level in etiolated pea seedlings.
- Taxon
- pea seedlingsLathyrus oleraceuse0
- Organ / stage
- etiolatede0
- Treatment
- ethylenee0
- Outcome
- level of cadaverinee0
- Direction
- increasee0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Exposing etiolated pea seedlings to ethylene which inhibited the activity of arginine decarboxylase and S-adenosylmethionine decarboxylase caused an increase in the level of cadaverine.”
Claim · model-written summary
Ethylene increased lysine decarboxylase activity, explaining elevated cadaverine.
- Taxon
- Pea SeedlingsLathyrus oleraceust0
- Treatment
- ethylenee0
- Gene
- lysine decarboxylasee0
- Outcome
- elevated level of cadaverinee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Pea Seedlings”
e0“The elevated level of cadaverine resulted from an increase in lysine decarboxylase activity in the tissue exposed to ethylene.”
Claim · model-written summary
Ethylene did not affect apparent enzyme K(m).
- Taxon
- Pea SeedlingsLathyrus oleraceust0
- Treatment
- hormonee0
- Outcome
- apparent K(m) of the enzymee0
- Direction
- did not affecte0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Pea Seedlings”
e0“The hormone did not affect the apparent K(m) of the enzyme”
Claim · model-written summary
Ethylene increased apparent enzyme V(max) by 96%.
- Taxon
- Pea SeedlingsLathyrus oleraceust0
- Treatment
- Ethylenet1
- Outcome
- apparent V(max)e0
- Direction
- increasede0
- Value
- 96%e0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Pea Seedlings”
t1“Ethylene”
e0“the apparent V(max) was increased by 96%”
Claim · model-written summary
Lysine decarboxylase activity increased in meristematic tissue of ethylene-treated plants.
- Taxon
- Pea SeedlingsLathyrus oleraceust0
- Organ / stage
- meristematice0
- Treatment
- ethylene-treatede0
- Outcome
- lysine decarboxylase activitye0
- Direction
- increasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Pea Seedlings”
e0“lysine decarboxylase activity in the ethylene-treated plants increased in both the meristematic and the elongation zone tissue”
Claim · model-written summary
Lysine decarboxylase activity increased in elongation zone tissue of ethylene-treated plants.
- Taxon
- Pea SeedlingsLathyrus oleraceust0
- Organ / stage
- elongation zone tissuee0
- Treatment
- ethylene-treatede0
- Outcome
- lysine decarboxylase activitye0
- Direction
- increasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Pea Seedlings”
e0“lysine decarboxylase activity in the ethylene-treated plants increased in both the meristematic and the elongation zone tissue”
Claim · model-written summary
Cadaverine accumulated only in the elongation zone.
- Taxon
- Pea SeedlingsLathyrus oleraceust0
- Outcome
- cadaverine accumulatione0
- Qualifier
- latter onlye0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Pea Seedlings”
e0“cadaverine accumulation was observed in the latter only”
Claim · model-written summary
Ethylene enhancement of enzyme activity was completely reversed after 24 hours in ethylene-free air.
- Taxon
- Pea SeedlingsLathyrus oleraceust0
- Treatment
- ethylene-free atmospheree0
- Outcome
- enzyme activitye0
- Direction
- reversed completelye0
- Qualifier
- 24 hourse0
- Comparator
- ethylenee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Pea Seedlings”
e0“The enhancement by ethylene of the enzyme activity was reversed completely 24 hours after transferring the plants to an ethylene-free atmosphere.”
Claim · model-written summary
The authors postulate compensatory lysine decarboxylase activity and cadaverine accumulation after ethylene inhibits other decarboxylases.
- Taxon
- Pea SeedlingsLathyrus oleraceust0
- Gene
- lysine decarboxylasee0
- Outcome
- accumulation of cadaverinee0
- Qualifier
- compensatory naturee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Pea Seedlings”
e0“It is postulated that the increase in lysine decarboxylase activity, and the consequent accumulation of cadaverine in ethylene-treated plants, is of a compensatory nature as a response to the inhibition of arginine and S-adenosylmethionine decarboxylase activity provoked by ethylene.”
The same questions in other papers
ethene · molecular: metabolites · Lathyrus oleraceus (pea)Positive and negative results
3 papers in the same direction as this paper · 6 in the opposite direction · 1 reporting no difference from an alternative
- no effect
- no effect
- no effect
7 papers more in this group
See all 11 papers →class · physiology: enzyme activity · Lathyrus oleraceus (pea)Positive and negative results
1 paper in the same direction as this paper · 5 in the opposite direction
- positive
- 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.