Abstract
Gibberellic acid (GA 3 ) and β‐indolylacetic acid (IAA), two of the well known growth hormones, induce four fold the activity of ornithine decarboxylase (ODC) during the germination of barley seeds ( Hordeum vulgare L. var. Beca). The optimal concentration for induction of ODC was 10 –5 M for GA 3 and 10 –3 M for IAA. When 10 –3 M of a polyamine, putrescine or spermidine, is added to the growth medium, ODC activity is significantly inhibited. This inhibition is due to the induction of a protein inhibitor of ODC (antizyme), whose apparent molecular weight is 16 000 ± 2 000 daltons. Addition of GA 3 to cultures which have been grown for 50 or 98 h in the presence of polyamines, abolishes the observed inhibition of ODC activity, while in the reverse experiment, addition of polyamines at 50 or 98 h does not affect the ODC activity induced by GA 3 . Cadaverine, a physiological plant diamine, enhances ODC activity; whereas 1,8‐diaminooctane (the alkyl analogue of spermidine) does not have any effect.
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Claims 11
Claim · model-written summary
Gibberellic acid induced a fourfold increase in ornithine decarboxylase activity during barley seed germination.
- Taxon
- barley
.jpg?width=60)
Hordeum vulgaree0 - Organ / stage
- barley seedse0
- Treatment
- Gibberellic acide0
- Gene
- ornithine decarboxylasee0
- Outcome
- activity of ornithine decarboxylasee0
- Direction
- inducee0
- Value
- four folde0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
.jpg?width=500)
Verbatim
e0“Gibberellic acid (GA 3 ) and β‐indolylacetic acid (IAA), two of the well known growth hormones, induce four fold the activity of ornithine decarboxylase (ODC) during the germination of barley seeds ( Hordeum vulgare L. var. Beca).”
Claim · model-written summary
β‐indolylacetic acid induced a fourfold increase in ornithine decarboxylase activity during barley seed germination.
- Taxon
- barleyHordeum vulgaree0
- Treatment
- β‐indolylacetic acide0
- Gene
- ornithine decarboxylasee0
- Outcome
- activity of ornithine decarboxylasee0
- Direction
- inducee0
- Value
- four folde0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Gibberellic acid (GA 3 ) and β‐indolylacetic acid (IAA), two of the well known growth hormones, induce four fold the activity of ornithine decarboxylase (ODC) during the germination of barley seeds ( Hordeum vulgare L. var. Beca).”
Claim · model-written summary
The optimal GA 3 concentration for ODC induction was 10 –5 M.
- Taxon
- barleyHordeum vulgaret0
- Treatment
- GA 3e0
- Outcome
- optimal concentration for induction of ODCe0
- Value
- 10 –5 Me0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“barley”
e0“The optimal concentration for induction of ODC was 10 –5 M for GA 3 and 10 –3 M for IAA.”
Claim · model-written summary
The optimal IAA concentration for ODC induction was 10 –3 M.
- Taxon
- barleyHordeum vulgaret0
- Treatment
- IAAe0
- Outcome
- optimal concentration for induction of ODCe0
- Value
- 10 –3 Me0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“barley seeds”
e0“The optimal concentration for induction of ODC was 10 –5 M for GA 3 and 10 –3 M for IAA.”
Claim · model-written summary
Putrescine at 10 –3 M significantly inhibited ODC activity.
- Taxon
- barleyHordeum vulgaret0
- Treatment
- putrescinee0
- Outcome
- ODC activitye0
- Direction
- inhibitede0
- Value
- 10 –3 Me0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“barley seeds”
e0“When 10 –3 M of a polyamine, putrescine or spermidine, is added to the growth medium, ODC activity is significantly inhibited.”
Claim · model-written summary
Spermidine at 10 –3 M significantly inhibited ODC activity.
- Taxon
- barleyHordeum vulgaret0
- Treatment
- spermidinee0
- Outcome
- ODC activitye0
- Direction
- inhibitede0
- Value
- 10 –3 Me0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“barley seeds”
e0“When 10 –3 M of a polyamine, putrescine or spermidine, is added to the growth medium, ODC activity is significantly inhibited.”
Claim · model-written summary
Polyamine inhibition was attributed to induction of an ODC protein inhibitor, antizyme, with apparent molecular weight 16 000 ± 2 000 daltons.
- Taxon
- barleyHordeum vulgaret0
- Gene
- antizymee0
- Outcome
- inhibitione0
- Value
- 16 000 ± 2 000 daltonse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“barley seeds”
e0“This inhibition is due to the induction of a protein inhibitor of ODC (antizyme), whose apparent molecular weight is 16 000 ± 2 000 daltons.”
Claim · model-written summary
GA 3 added after 50 or 98 hours of polyamine culture abolished ODC inhibition.
- Taxon
- barleyHordeum vulgaret0
- Treatment
- Addition of GA 3e0
- Outcome
- inhibition of ODC activitye0
- Direction
- abolishese0
- Qualifier
- 50 or 98 he0
- Comparator
- presence of polyaminese0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“barley seeds”
e0“Addition of GA 3 to cultures which have been grown for 50 or 98 h in the presence of polyamines, abolishes the observed inhibition of ODC activity”
Claim · model-written summary
Polyamines added after 50 or 98 hours did not change GA 3 induced ODC activity.
- Taxon
- barleyHordeum vulgaret0
- Treatment
- addition of polyaminese0
- Outcome
- ODC activitye0
- Direction
- does not affecte0
- Qualifier
- 50 or 98 he0
- Comparator
- GA 3e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“barley seeds”
e0“addition of polyamines at 50 or 98 h does not affect the ODC activity induced by GA 3”
Claim · model-written summary
Cadaverine enhanced ODC activity.
- Taxon
- barleyHordeum vulgaret0
- Treatment
- Cadaverinee0
- Outcome
- ODC activitye0
- Direction
- enhancese0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“barley seeds”
e0“Cadaverine, a physiological plant diamine, enhances ODC activity”
Claim · model-written summary
1,8‐diaminooctane had no effect on ODC activity.
- Taxon
- barleyHordeum vulgaret0
- Treatment
- 1,8‐diaminooctanee0
- Outcome
- effecte0
- Direction
- does not have any effecte0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“barley seeds”
e0“1,8‐diaminooctane (the alkyl analogue of spermidine) does not have any effect”
The same questions in other papers
Gibberellic acid · molecular: metabolites · Hordeum vulgare (barley)Results differ
9 papers in the same direction as this paper · 5 in the opposite direction
- no effect
- no effect
- no effect
11 papers more in this group
See all 15 papers →cadaverine · molecular: metabolites · Hordeum vulgare (barley)Positive and negative results
1 in the opposite direction
- negative
putrescine · molecular: metabolites · Hordeum vulgare (barley)Positive and negative results
1 paper in the same direction as this paper · 2 in the opposite direction
- positive
- positive
- negative
spermidine · molecular: metabolites · Hordeum vulgare (barley)Positive and negative results
3 in the opposite direction
- positive
- positive
- positive
Gibberellic acid · disease · Hordeum vulgare (barley)Results agree
2 papers in the same direction as this paper
- positive
- 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.