Abstract
Summary. In the short-day plant Pharbitis nil, strain Violet, flower formation is inhibited by application of the growth retardant N,N-dimethylaminosuccinamic acid (B 995) via the roots for a period of 24 hours prior to one inductive long night. Terminal flower bud formation is suppressed by a B 995 concentration of 100 mg/1, but for complete suppression of all axillary flower buds 2000 mg/1 is required. Inhibi tion of flower formation is also caused by B 995 application via plumules or coty ledons, even if made at the end of the inductive night. B 995 treatment always results in short, thick internodes and dark-green leaves. Transport of uC-labeled B 995 from cotyledons to plumules and roots takes place during a 16-hour dark period. However, very little label moves from a treated to an untreated cotyledon. Application of B 995 to one of the two cotyledons results in flower inhibition, although the untreated cotyledon produces sufficient flower hormone to induce optimal flower formation. It is concluded therefore that in the short-day plant Pharbitis B 995 does not affect flower hormone production, but rather inhibits floral initiation by interfering with the action of the hormone in the shoot apex. Inhibition of flower formation by B 995 can be completely overcome by appli cation of gibberellin A3 to the plumulus before the long night. A dose of 0.01 (xg GA3/apex is sufficient to re-establish flowering, but much more GA3 is required to restore internode length equal to that of the control. Indole-3-acetic acid and naph thalene acetic acid are totally inactive in overcoming B 995 inhibition of flower formation and growth. The growth rate of Pharbitis plants treated with B 995 and continuously grown in long-day conditions is initially low, but reaches the same level as in untreated plants approximately 25 days after treatment. 14C-labeled B 995 applied to cotyledons accumulates to a high degree in roots and in the basal part of the shoots. 14C-B 995 is metabolized very slowly and persists
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Claims 17
Claim · model-written summary
Root application of B 995 before the inductive night inhibited flower formation.
- Taxon
- Pharbitis nil
Ipomoea nile0 - Material
- strain Violete0
- Treatment
- application of the growth retardant N,N-dimethylaminosuccinamic acid (B 995) via the rootse0
- Outcome
- flower formatione0
- Direction
- inhibitede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“In the short-day plant Pharbitis nil, strain Violet, flower formation is inhibited by application of the growth retardant N,N-dimethylaminosuccinamic acid (B 995) via the roots for a period of 24 hours prior to one inductive long night.”
Claim · model-written summary
B 995 at 100 mg/1 suppressed terminal flower buds.
- Taxon
- Pharbitis nilIpomoea nile0
- Treatment
- B 995 concentration of 100 mg/1e0
- Outcome
- Terminal flower bud formatione0
- Direction
- suppressede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“In the short-day plant Pharbitis nil, strain Violet, flower formation is inhibited by application of the growth retardant N,N-dimethylaminosuccinamic acid (B 995) via the roots for a period of 24 hours prior to one inductive long night. Terminal flower bud formation is suppressed by a B 995 concentration of 100 mg/1, but for complete suppression of all axillary flower buds 2000 mg/1 is required.”
Claim · model-written summary
B 995 at 2000 mg/1 completely suppressed axillary flower buds.
- Taxon
- Pharbitis nilIpomoea nile0
- Treatment
- B 995e0
- Outcome
- axillary flower budse0
- Direction
- suppressione0
- Value
- 2000 mg/1e0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“In the short-day plant Pharbitis nil, strain Violet, flower formation is inhibited by application of the growth retardant N,N-dimethylaminosuccinamic acid (B 995) via the roots for a period of 24 hours prior to one inductive long night. Terminal flower bud formation is suppressed by a B 995 concentration of 100 mg/1, but for complete suppression of all axillary flower buds 2000 mg/1 is required.”
Claim · model-written summary
B 995 applied through plumules or cotyledons inhibited flowering even at the end of the night.
- Taxon
- PHARBITIS NILIpomoea nilt0
- Treatment
- B 995 application via plumules or coty ledonse0
- Outcome
- flower formatione0
- Direction
- Inhibi tione0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“PHARBITIS NIL”
e0“Inhibi tion of flower formation is also caused by B 995 application via plumules or coty ledons, even if made at the end of the inductive night.”
Claim · model-written summary
B 995 treatment produced short, thick internodes and dark-green leaves.
- Taxon
- PHARBITIS NILIpomoea nilt0
- Treatment
- B 995 treatmente0
- Outcome
- short, thick internodes and dark-green leavese0
Not reportedComparatorDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“PHARBITIS NIL”
e0“B 995 treatment always results in short, thick internodes and dark-green leaves.”
Claim · model-written summary
Labelled B 995 moved from cotyledons to plumules and roots in darkness.
- Taxon
- PHARBITIS NILIpomoea nilt0
- Outcome
- Transport of uC-labeled B 995 from cotyledons to plumules and rootse0
- Qualifier
- during a 16-hour dark periode0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“PHARBITIS NIL”
e0“Transport of uC-labeled B 995 from cotyledons to plumules and roots takes place during a 16-hour dark period.”
Claim · model-written summary
Very little label moved between cotyledons.
- Taxon
- PHARBITIS NILIpomoea nilt0
- Outcome
- label moves from a treated to an untreated cotyledone0
- Direction
- very littlee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“PHARBITIS NIL”
e0“However, very little label moves from a treated to an untreated cotyledon.”
Claim · model-written summary
Treating one cotyledon with B 995 inhibited flowering despite hormone production by the other cotyledon.
- Taxon
- PHARBITIS NILIpomoea nilt0
- Treatment
- Application of B 995 to one of the two cotyledonse0
- Outcome
- flower inhibitione0
- Direction
- inhibitione0
- Comparator
- untreated cotyledone0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“PHARBITIS NIL”
e0“Application of B 995 to one of the two cotyledons results in flower inhibition, although the untreated cotyledon produces sufficient flower hormone to induce optimal flower formation.”
Claim · model-written summary
The authors concluded B 995 interfered with hormone action at the shoot apex rather than hormone production.
- Taxon
- PHARBITIS NILIpomoea nilt0
- Treatment
- B 995e0
- Outcome
- floral initiatione0
- Qualifier
- interfering with the action of the hormone in the shoot apexe0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“PHARBITIS NIL”
e0“It is concluded therefore that in the short-day plant Pharbitis B 995 does not affect flower hormone production, but rather inhibits floral initiation by interfering with the action of the hormone in the shoot apex.”
Claim · model-written summary
Gibberellin A3 before the night fully overcame B 995 inhibition of flowering.
- Taxon
- PHARBITIS NILIpomoea nilt0
- Treatment
- appli cation of gibberellin A3 to the plumuluse0
- Outcome
- Inhibition of flower formatione0
- Direction
- completely overcomee0
- Comparator
- B 995e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“PHARBITIS NIL”
e0“Inhibition of flower formation by B 995 can be completely overcome by appli cation of gibberellin A3 to the plumulus before the long night.”
Claim · model-written summary
A 0.01 (xg GA3/apex dose restored flowering.
- Taxon
- PHARBITIS NILIpomoea nilt0
- Treatment
- 0.01 (xg GA3/apexe0
- Outcome
- floweringe0
- Direction
- re-establishe0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“PHARBITIS NIL”
e0“A dose of 0.01 (xg GA3/apex is sufficient to re-establish flowering, but much more GA3 is required to restore internode length equal to that of the control.”
Claim · model-written summary
More GA3 was needed to restore internode length to control level.
- Taxon
- PHARBITIS NILIpomoea nilt0
- Treatment
- GA3e0
- Outcome
- internode lengthe0
- Direction
- restoree0
- Qualifier
- much more GA3e0
- Comparator
- controle0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“PHARBITIS NIL”
e0“A dose of 0.01 (xg GA3/apex is sufficient to re-establish flowering, but much more GA3 is required to restore internode length equal to that of the control.”
Claim · model-written summary
Indole-3-acetic acid did not overcome B 995 inhibition.
- Taxon
- PHARBITIS NILIpomoea nilt0
- Treatment
- Indole-3-acetic acide0
- Outcome
- B 995 inhibition of flower formation and growthe0
- Direction
- totally inactivee0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“PHARBITIS NIL”
e0“Indole-3-acetic acid and naph thalene acetic acid are totally inactive in overcoming B 995 inhibition of flower formation and growth.”
Claim · model-written summary
Naphthalene acetic acid did not overcome B 995 inhibition.
- Taxon
- PHARBITIS NILIpomoea nilt0
- Treatment
- naph thalene acetic acide0
- Outcome
- B 995 inhibition of flower formation and growthe0
- Direction
- totally inactivee0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“PHARBITIS NIL”
e0“Indole-3-acetic acid and naph thalene acetic acid are totally inactive in overcoming B 995 inhibition of flower formation and growth.”
Claim · model-written summary
B 995 initially lowered growth rate under long days, then growth matched untreated plants about 25 days later.
- Taxon
- PHARBITIS NILIpomoea nilt0
- Treatment
- B 995e0
- Outcome
- growth ratee0
- Direction
- initially lowe0
- Qualifier
- approximately 25 days after treatmente0
- Comparator
- untreated plantse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“PHARBITIS NIL”
e0“The growth rate of Pharbitis plants treated with B 995 and continuously grown in long-day conditions is initially low, but reaches the same level as in untreated plants approximately 25 days after treatment.”
Claim · model-written summary
Labelled B 995 accumulated strongly in roots and basal shoots.
- Taxon
- PHARBITIS NILIpomoea nilt0
- Organ / stage
- roots and in the basal part of the shootse0
- Outcome
- 14C-labeled B 995e0
- Direction
- accumulates to a high degreee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“PHARBITIS NIL”
e0“14C-labeled B 995 applied to cotyledons accumulates to a high degree in roots and in the basal part of the shoots.”
Claim · model-written summary
Labelled B 995 was metabolized slowly and persisted.
- Taxon
- PHARBITIS NILIpomoea nilt0
- Outcome
- 14C-B 995e0
- Direction
- very slowlye0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“PHARBITIS NIL”
e0“14C-B 995 is metabolized very slowly and persists”
The same questions in other papers
Gibberellic acid · phenology · Ipomoea nil (Japanese morning glory)Results differ
5 papers in the same direction as this paper · 1 in the opposite direction
- negative
- positive
- positive
3 papers more in this group
See all 7 papers →gibberellin A3 · disease · Ipomoea nil (Japanese morning glory)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.