Abstract
Abstract Gibberellic acid (GA 3 ) enhanced directly the release of 14 CO 2 from tryptophan‐1‐ l4 C by cell free preparations of Avena coleoptile tips. The rate of tryptophan metabolism in the presence of GA 3 was increased by approximately 100 per cent. The addition of auxin synthesis inhibitors to incubation flasks nullified the enhancement effect of GA 3 on elongation of the coleoptile tips. These studies implicate tryptamine as an intermediate in the formation of auxin from tryptophan. The possibility of GA 3 ‐IAA interaction in the elongation processes was also investigated. Combination treatments of these growth‐promoting substances did not induce a synergistic growth response by the coleoptile tissue.
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Claims 5
Claim · model-written summary
GA 3 directly enhanced release of 14 CO 2 from tryptophan in cell-free Avena coleoptile preparations.
- Organ / stage
- coleoptile tipse0
- Treatment
- Gibberellic acid (GA 3 )e0
- Outcome
- release of 14 CO 2 from tryptophan‐1‐ l4 Ce0
- Direction
- enhancede0
AvenaNot reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Avena Coleoptile”
e0“Gibberellic acid (GA 3 ) enhanced directly the release of 14 CO 2 from tryptophan‐1‐ l4 C by cell free preparations of Avena coleoptile tips.”
Claim · model-written summary
GA 3 increased tryptophan metabolism by approximately 100 per cent.
- Treatment
- GA 3e0
- Outcome
- rate of tryptophan metabolisme0
- Direction
- increasede0
- Value
- approximately 100 per cente0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Avena Coleoptile”
e0“The rate of tryptophan metabolism in the presence of GA 3 was increased by approximately 100 per cent.”
Claim · model-written summary
Auxin synthesis inhibitors nullified GA 3 enhancement of coleoptile elongation.
- Treatment
- addition of auxin synthesis inhibitorse0
- Outcome
- elongation of the coleoptile tipse0
- Direction
- nullifiede0
- Comparator
- GA 3e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Avena Coleoptile”
e0“The addition of auxin synthesis inhibitors to incubation flasks nullified the enhancement effect of GA 3 on elongation of the coleoptile tips.”
Claim · model-written summary
Tryptamine was implicated as an intermediate in auxin formation from tryptophan.
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Avena Coleoptile”
e0“These studies implicate tryptamine as an intermediate in the formation of auxin from tryptophan.”
Claim · model-written summary
Combined growth promoters did not induce a synergistic coleoptile growth response.
- Treatment
- Combination treatments of these growth‐promoting substancese0
- Outcome
- synergistic growth response by the coleoptile tissuee0
- Direction
- did not inducee0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Avena Coleoptile”
e0“Combination treatments of these growth‐promoting substances did not induce a synergistic growth response by the coleoptile tissue.”
The same questions in other papers
class · growth · AvenaPositive and negative results
4 papers in the same direction as this paper · 6 in the opposite direction
- positive
- positive
- positive
7 papers more in this group
See all 11 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.