Abstract
The effects of a phasing dark period and an intervening light period on circadian flowering response to an inductive dark period were studied with Pharbitis, cultivar Kidachi, grown in continuous fluorescent light. A single light-on signal by the transition from dark to light period established a circadian rhythm of flowering, which lasted for at least 48 h. The generation of the rhythm and the phase pattern were not affected by exogenous gibberellin A₃ (GA₃), benzyladenine (BA) or indoleacetic acid (IAA), though the two formers stimulated flowering during the inducible phases of the rhythm. The same circadian rhythm was detected when the phasing dark period was longer than 4 h, but the response level of flowering became higher with lenghening duration of the dark period. The circadian rhythm became evident if the light intensity of the intervening light period was less than 5,000lux, though the flower-response level became generally lower with lowering intensity of the light. The flowering was influenced by the phase of the rhythm during which the plants were exposed to the inductive dark period. A significance of the phasing dark period and the intervening light period is discussed in relation to the first dark-light periods in the photoperiodic flowering of short-day plants that require several cycles of dark-light period to flower.
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Claims 11
Claim · model-written summary
A single light-on transition established a flowering rhythm lasting at least 48 h.
- Taxon
- Pharbitis nil Choisy
Ipomoea nilt0 - Treatment
- A single light-on signale0
- Outcome
- circadian rhythm of floweringe0
- Value
- at least 48 he0
Not reportedComparatorDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“A single light-on signal by the transition from dark to light period established a circadian rhythm of flowering, which lasted for at least 48 h.”
t0“Pharbitis nil Choisy”
Claim · model-written summary
Exogenous gibberellin A₃ did not affect rhythm generation or phase pattern.
- Taxon
- Pharbitis nil ChoisyIpomoea nilt0
- Treatment
- exogenous gibberellin A₃e0
- Outcome
- generation of the rhythm and the phase patterne0
- Direction
- not affectede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The generation of the rhythm and the phase pattern were not affected by exogenous gibberellin A₃ (GA₃)”
t0“Pharbitis nil Choisy”
Claim · model-written summary
Benzyladenine did not affect rhythm generation or phase pattern.
- Taxon
- Pharbitis nil ChoisyIpomoea nilt0
- Treatment
- benzyladeninee0
- Outcome
- generation of the rhythm and the phase patterne0
- Direction
- not affectede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The generation of the rhythm and the phase pattern were not affected by exogenous gibberellin A₃ (GA₃), benzyladenine (BA)”
t0“Pharbitis nil Choisy”
Claim · model-written summary
Indoleacetic acid did not affect rhythm generation or phase pattern.
- Taxon
- Pharbitis nil ChoisyIpomoea nilt0
- Treatment
- indoleacetic acide0
- Outcome
- generation of the rhythm and the phase patterne0
- Direction
- not affectede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The generation of the rhythm and the phase pattern were not affected by exogenous gibberellin A₃ (GA₃), benzyladenine (BA) or indoleacetic acid (IAA)”
t0“Pharbitis nil Choisy”
Claim · model-written summary
Gibberellin A₃ stimulated flowering during inducible phases.
- Taxon
- Pharbitis nil ChoisyIpomoea nilt0
- Treatment
- gibberellin A₃e0
- Outcome
- floweringe0
- Direction
- stimulatede0
- Qualifier
- during the inducible phases of the rhythme0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“gibberellin A₃ (GA₃), benzyladenine (BA) or indoleacetic acid (IAA), though the two formers stimulated flowering during the inducible phases of the rhythm”
t0“Pharbitis nil Choisy”
Claim · model-written summary
Benzyladenine stimulated flowering during inducible phases.
- Taxon
- Pharbitis nil ChoisyIpomoea nilt0
- Treatment
- benzyladeninee0
- Outcome
- floweringe0
- Direction
- stimulatede0
- Qualifier
- during the inducible phases of the rhythme0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“benzyladenine (BA) or indoleacetic acid (IAA), though the two formers stimulated flowering during the inducible phases of the rhythm”
t0“Pharbitis nil Choisy”
Claim · model-written summary
The same circadian rhythm was detected when the phasing dark period exceeded 4 h.
- Taxon
- Pharbitis nil ChoisyIpomoea nilt0
- Treatment
- phasing dark periode0
- Outcome
- same circadian rhythm was detectede0
- Value
- longer than 4 he0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The same circadian rhythm was detected when the phasing dark period was longer than 4 h”
t0“Pharbitis nil Choisy”
Claim · model-written summary
Flowering response rose as dark period duration lengthened.
- Taxon
- Pharbitis nil ChoisyIpomoea nilt0
- Treatment
- duration of the dark periode0
- Outcome
- response level of floweringe0
- Direction
- highere0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the response level of flowering became higher with lenghening duration of the dark period”
t0“Pharbitis nil Choisy”
Claim · model-written summary
The rhythm was evident when intervening light intensity was below 5,000lux.
- Taxon
- Pharbitis nil ChoisyIpomoea nilt0
- Treatment
- light intensity of the intervening light periode0
- Outcome
- circadian rhythm became evidente0
- Value
- less than 5,000luxe0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The circadian rhythm became evident if the light intensity of the intervening light period was less than 5,000lux”
t0“Pharbitis nil Choisy”
Claim · model-written summary
Flowering response declined with lower intervening light intensity.
- Taxon
- Pharbitis nil ChoisyIpomoea nilt0
- Treatment
- intensity of the lighte0
- Outcome
- flower-response levele0
- Direction
- lowere0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the flower-response level became generally lower with lowering intensity of the light”
t0“Pharbitis nil Choisy”
Claim · model-written summary
Flowering depended on the rhythm phase during inductive dark exposure.
- Taxon
- Pharbitis nil ChoisyIpomoea nilt0
- Treatment
- inductive dark periode0
- Outcome
- floweringe0
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The flowering was influenced by the phase of the rhythm during which the plants were exposed to the inductive dark period”
t0“Pharbitis nil Choisy”
The same questions in other papers
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- positive
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N-benzyladenine · phenology · Ipomoea nil (Japanese morning glory)Results agree
4 papers in the same direction as this paper
- positive
- positive
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1 paper more in this group
See all 5 papers →light · phenology · Ipomoea nil (Japanese morning glory)Results differ
15 papers in the same direction as this paper · 13 in the opposite direction
- negative
- negative
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25 papers more in this group
See all 29 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.