Abstract
Although sugar has been suggested to promote floral transition in many plant species, growth on high concentrations (5% [w/v]) of sucrose (Suc) significantly delayed flowering time, causing an increase in the number of leaves at the time of flowering in Arabidopsis. The effect of high concentrations of Suc seemed to be metabolic rather than osmotic. The delay of floral transition was due to extension of the late vegetative phase, which resulted in a delayed activation of LFY expression. In addition, growth on low concentrations (1% [w/v]) of Suc slightly inhibited flowering in wild-type plants. This delay resulted from effects on the early vegetative phase. This inhibition was more pronounced in tfl1, an early flowering mutant, than in the wild type. Although 1% (w/v) Suc was reported to promote floral transition of late-flowering mutants such as co, fca, and gi, floral transition in these mutants was delayed by a further increase in Suc concentration. These results suggest that sugar may affect floral transition by activating or inhibiting genes that act to control floral transition, depending on the concentration of sugars, the genetic background of the plants, and when the sugar is introduced. Growth on 1% (w/v) Suc did not restore the reduced expression levels of FT and SOC1/AGL20 in co or fca mutants. Rather, expression of FT and SOC1/AGL20 was repressed by 1% (w/v) Suc in wild-type background. The possible effects of sugar on gene expression to promote floral transition are discussed.
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Claims 11
Claim · model-written summary
High sucrose delayed flowering and increased leaf number at flowering.
- Taxon
- Arabidopsis
Arabidopsise0 - Treatment
- high concentrations (5% [w/v]) of sucrose (Suc)e0
- Outcome
- flowering timee0
- Direction
- delayede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“growth on high concentrations (5% [w/v]) of sucrose (Suc) significantly delayed flowering time, causing an increase in the number of leaves at the time of flowering in Arabidopsis.”
Claim · model-written summary
High sucrose increased leaf number at flowering.
- Taxon
- ArabidopsisArabidopsise0
- Treatment
- high concentrations (5% [w/v]) of sucrose (Suc)e0
- Outcome
- number of leaves at the time of floweringe0
- Direction
- increasee0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“growth on high concentrations (5% [w/v]) of sucrose (Suc) significantly delayed flowering time, causing an increase in the number of leaves at the time of flowering in Arabidopsis.”
Claim · model-written summary
The high-sucrose effect appeared metabolic rather than osmotic.
- Taxon
- ArabidopsisArabidopsist0
- Treatment
- high concentrations of Suce0
- Outcome
- metabolic rather than osmotice0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The effect of high concentrations of Suc seemed to be metabolic rather than osmotic.”
t0“Arabidopsis”
Claim · model-written summary
The flowering delay came from extension of the late vegetative phase.
- Taxon
- ArabidopsisArabidopsist0
- Outcome
- delay of floral transitione0
- Qualifier
- extension of the late vegetative phasee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The delay of floral transition was due to extension of the late vegetative phase”
t0“Arabidopsis”
Claim · model-written summary
Extended late vegetative phase delayed LFY expression.
- Taxon
- ArabidopsisArabidopsist0
- Organ / stage
- late vegetative phasee0
- Gene
- LFYe0
- Outcome
- activation of LFY expressione0
- Direction
- delayede0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“extension of the late vegetative phase, which resulted in a delayed activation of LFY expression.”
t0“Arabidopsis”
Claim · model-written summary
Low sucrose slightly inhibited flowering in wild-type plants.
- Taxon
- ArabidopsisArabidopsist0
- Material
- wild-type plantse0
- Treatment
- low concentrations (1% [w/v]) of Suce0
- Outcome
- floweringe0
- Direction
- inhibitede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“growth on low concentrations (1% [w/v]) of Suc slightly inhibited flowering in wild-type plants.”
t0“Arabidopsis”
Claim · model-written summary
Low-sucrose flowering delay resulted from early vegetative phase effects.
- Taxon
- ArabidopsisArabidopsist0
- Organ / stage
- early vegetative phasee0
- Outcome
- delaye0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“This delay resulted from effects on the early vegetative phase.”
t0“Arabidopsis”
Claim · model-written summary
Low-sucrose inhibition was more pronounced in tfl1 than wild type.
- Taxon
- ArabidopsisArabidopsist0
- Material
- tfl1e0
- Outcome
- inhibitione0
- Direction
- more pronouncede0
- Comparator
- wild typee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“This inhibition was more pronounced in tfl1, an early flowering mutant, than in the wild type.”
t0“Arabidopsis”
Claim · model-written summary
Further sucrose increase delayed floral transition of co, fca and gi mutants.
- Taxon
- ArabidopsisArabidopsist0
- Material
- co, fca, and gie1
- Treatment
- a further increase in Suc concentratione0
- Outcome
- floral transitione0
- Direction
- delayede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“floral transition in these mutants was delayed by a further increase in Suc concentration.”
t0“Arabidopsis”
e1“co, fca, and gi”
Claim · model-written summary
One-percent sucrose did not restore reduced FT and SOC1/AGL20 expression in co or fca.
- Taxon
- ArabidopsisArabidopsist0
- Material
- co or fca mutantse0
- Treatment
- 1% (w/v) Suce0
- Outcome
- expression levels of FT and SOC1/AGL20e0
- Direction
- did not restoree0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Growth on 1% (w/v) Suc did not restore the reduced expression levels of FT and SOC1/AGL20 in co or fca mutants.”
t0“Arabidopsis”
Claim · model-written summary
One-percent sucrose repressed FT and SOC1/AGL20 expression in wild type.
- Taxon
- ArabidopsisArabidopsist0
- Material
- wild-type backgrounde0
- Treatment
- 1% (w/v) Suce0
- Outcome
- expression of FT and SOC1/AGL20e0
- Direction
- repressede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“expression of FT and SOC1/AGL20 was repressed by 1% (w/v) Suc in wild-type background.”
t0“Arabidopsis”
The same questions in other papers
sucrose · growth · ArabidopsisPositive and negative results
7 papers in the same direction as this paper · 9 in the opposite direction
- positive
- negative
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13 papers more in this group
See all 17 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.