Abstract
The effects of temperature and daily-integrated photosynthetic photon flux (PPF DI ) on African violet ( Saintpaulia ionantha Wendl.) flower initiation and development were quantified to provide the basis for an inflorescence development model. The percentage of leaf axils in which an inflorescence initiated and continued development increased as the PPF DI increased from 1 to 4 mol·m -2 ·day -1 , while the rate of inflorescence development was a function of the average daily temperature (ADT). The appearance of a visible flower bud (VB) in a leaf axil was related to the growth of the subtending leaf blade. A polynomial model based on ADT and PPF DI was used to describe leaf blade length at visible bud (LBL VB ). A nonlinear model was used to describe the influence of ADT on leaf expansion rate (LER). Inflorescence appearance in the leaf axil was predicted by measuring LBL and estimating the time for the leaf blade to develop to the length required for VB. A phasic-development scale was developed to quantify inflorescence development. Days required for an inflorescence to develop from VB to first open flower was described as a function of ADT and either inflorescence height or inflorescence development stage (IDS). Days from leaf emergence to first open flower for the inflorescence initiated in that leaf axil decreased from 86 to 55 as ADT increased from 18 to 26C.
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Claims 9
Claim · model-written summary
Inflorescence initiation and continued development increased as daily light integral increased from 1 to 4 mol·m -2 ·day -1.
- Taxon
- African Violet
Streptocarpus ionanthust0 - Treatment
- PPF DIe0
- Outcome
- percentage of leaf axils in which an inflorescence initiated and continued developmente0
- Direction
- increasede0
- Value
- 1 to 4 mol·m -2 ·day -1e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The percentage of leaf axils in which an inflorescence initiated and continued development increased as the PPF DI increased from 1 to 4 mol·m -2 ·day -1”
t0“African Violet”
Claim · model-written summary
Inflorescence development rate was a function of average daily temperature.
- Taxon
- African VioletStreptocarpus ionanthust0
- Treatment
- average daily temperature (ADT)e0
- Outcome
- rate of inflorescence developmente0
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the rate of inflorescence development was a function of the average daily temperature (ADT)”
t0“African Violet”
Claim · model-written summary
Visible flower bud appearance was related to subtending leaf blade growth.
- Taxon
- African VioletStreptocarpus ionanthust0
- Organ / stage
- subtending leaf bladee0
- Outcome
- appearance of a visible flower bud (VB)e0
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The appearance of a visible flower bud (VB) in a leaf axil was related to the growth of the subtending leaf blade”
t0“African Violet”
Claim · model-written summary
A polynomial model described leaf blade length at visible bud using temperature and light.
- Taxon
- African VioletStreptocarpus ionanthust0
- Outcome
- leaf blade length at visible bud (LBL VB )e0
Not reportedComparatorValue
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“A polynomial model based on ADT and PPF DI was used to describe leaf blade length at visible bud (LBL VB )”
t0“African Violet”
Claim · model-written summary
A nonlinear model described the influence of temperature on leaf expansion rate.
- Taxon
- African VioletStreptocarpus ionanthust0
- Outcome
- leaf expansion rate (LER)e0
Not reportedComparatorValue
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“A nonlinear model was used to describe the influence of ADT on leaf expansion rate (LER)”
t0“African Violet”
Claim · model-written summary
Inflorescence appearance was predicted using leaf blade length and time to visible bud.
- Taxon
- African VioletStreptocarpus ionanthust0
- Outcome
- Inflorescence appearance in the leaf axile0
Not reportedComparatorValue
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Inflorescence appearance in the leaf axil was predicted by measuring LBL and estimating the time for the leaf blade to develop to the length required for VB”
t0“African Violet”
Claim · model-written summary
A phasic development scale was developed to quantify inflorescence development.
- Taxon
- African VioletStreptocarpus ionanthust0
- Outcome
- inflorescence developmente0
Not reportedComparatorValue
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“A phasic-development scale was developed to quantify inflorescence development”
t0“African Violet”
Claim · model-written summary
Time from visible bud to first flower was described by temperature and inflorescence height or stage.
- Taxon
- African VioletStreptocarpus ionanthust0
- Outcome
- Days required for an inflorescence to develop from VB to first open flowere0
Not reportedComparatorValue
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Days required for an inflorescence to develop from VB to first open flower was described as a function of ADT and either inflorescence height or inflorescence development stage (IDS)”
t0“African Violet”
Claim · model-written summary
Leaf emergence to first flower decreased from 86 to 55 days as temperature rose from 18 to 26C.
- Taxon
- African VioletStreptocarpus ionanthust0
- Treatment
- ADTe0
- Outcome
- Days from leaf emergence to first open flowere0
- Direction
- decreasede0
- Value
- 86 to 55e0
- Qualifier
- 18 to 26Ce0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Days from leaf emergence to first open flower for the inflorescence initiated in that leaf axil decreased from 86 to 55 as ADT increased from 18 to 26C”
t0“African Violet”