Abstract
Reciprocal transfer experiments can be used to describe the stages of photoperiod sensitivity in daylength-sensitive plants. However, there are inconsistencies in the literature concerning the techniques used and, more importantly, the assumptions made when analysing such data sets. This paper appraises the use of reciprocal transfer experiments, with chrysanthemum as a model (short day) plant. Experiments showed little evidence to suggest that axillary meristems were incapable of responding to a floral stimulus when released from apical dominance by pinching (even though the apex appeared vegetative). Five short days given after pinching resulted in sufficient induction to initiate an inflorescence, although seven short days were required to commit a plant to flower with a leaf number similar to plants grown in continuous short days. Floral initiation was then visible at the apex after nine short days. Once the inflorescence had been initiated, long days delayed the early stages of flower development. The results are discussed with reference to reciprocal transfer experiments in general, and specifically in relation to problems that arise when the length of a `juvenile' phase is confounded with the number of inductive cycles for flower commitment.
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Claims 5
Claim · model-written summary
There was little evidence that axillary meristems of chrysanthemum were incapable of responding to a floral stimulus when released from apical dominance by pinching.
- Taxon
- chrysanthemum
.jpeg?width=60)
Chrysanthemumt0 - Material
- Snowdont0
- Outcome
- axillary meristems were incapable of responding to a floral stimuluse1
- Qualifier
- released from apical dominance by pinchinge1
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
.jpeg?width=500)
Verbatim
e1“Experiments showed little evidence to suggest that axillary meristems were incapable of responding to a floral stimulus when released from apical dominance by pinching”
t0“chrysanthemum cv. Snowdon”
Claim · model-written summary
Five short days given after pinching gave sufficient induction to initiate an inflorescence in chrysanthemum.
- Taxon
- chrysanthemumChrysanthemumt0
- Material
- Snowdont0
- Treatment
- Five short days given after pinchinge1
- Outcome
- induction to initiate an inflorescencee1
- Direction
- sufficiente1
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“Five short days given after pinching resulted in sufficient induction to initiate an inflorescence”
t0“chrysanthemum cv. Snowdon”
Claim · model-written summary
Seven short days were required to commit a chrysanthemum plant to flower with a leaf number similar to plants grown in continuous short days.
- Taxon
- chrysanthemumChrysanthemumt0
- Material
- Snowdont0
- Treatment
- seven short dayse1
- Outcome
- commit a plant to flowere1
- Direction
- requirede1
- Comparator
- plants grown in continuous short dayse1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“seven short days were required to commit a plant to flower with a leaf number similar to plants grown in continuous short days”
t0“chrysanthemum cv. Snowdon”
Claim · model-written summary
Floral initiation became visible at the chrysanthemum apex after nine short days.
- Taxon
- chrysanthemumChrysanthemumt0
- Material
- Snowdont0
- Outcome
- Floral initiation was then visible at the apexe1
- Qualifier
- nine short dayse1
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“Floral initiation was then visible at the apex after nine short days”
t0“chrysanthemum cv. Snowdon”
Claim · model-written summary
Once the inflorescence had been initiated, long days delayed the early stages of flower development in chrysanthemum.
- Taxon
- chrysanthemumChrysanthemumt0
- Material
- Snowdont0
- Treatment
- long dayse1
- Outcome
- early stages of flower developmente1
- Direction
- delayede1
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“Once the inflorescence had been initiated, long days delayed the early stages of flower development”
t0“chrysanthemum cv. Snowdon”
The same questions in other papers
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