Abstract
In higher plants, the regulation of anthocyanin synthesis by various factors including light, sugars and hormones is mediated by numerous regulatory factors acting at the transcriptional level. Here, the association between sucrose and the plant hormone, cytokinin, in the presence of light was investigated to elucidate cytokinin signaling cascades leading to the transcriptional activation of anthocyanin biosynthesis genes in Arabidopsis seedlings. We showed that cytokinin enhances anthocyanin content and transcript levels of sugar inducible structural gene UDPglucose: flavonoid 3-O-glucosyl transferase (UF3GT) and regulatory gene PRODUCTION OF ANTHOCYANIN PIGMENT 1 (PAP1). Genetic analysis showed that cytokinin signaling modulates sugar-induced anthocyanin biosynthesis through a two-component signaling cascade involving the type-B response regulators ARR1, ARR10 and ARR12 in a redundant manner. Genetic, physiological and molecular biological approaches demonstrated that cytokinin enhancement is partially dependent on phytochrome and cryptochrome downstream component HY5, but mainly on photosynthetic electron transport. Taken together, we suggest that cytokinin acts down-stream of the photosynthetic electron transport chain in which the plastoquinone redox poise is modulated by sugars in a photoreceptor independent manner.
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Claims 5
Claim · model-written summary
Cytokinin enhanced anthocyanin content in Arabidopsis.
- Taxon
- Arabidopsis
Arabidopsist0 - Treatment
- cytokinine0
- Outcome
- anthocyanin contente0
- Direction
- enhancese0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“We showed that cytokinin enhances anthocyanin content and transcript levels of sugar inducible structural gene UDPglucose: flavonoid 3-O-glucosyl transferase (UF3GT) and regulatory gene PRODUCTION OF ANTHOCYANIN PIGMENT 1 (PAP1).”
t0“Arabidopsis”
Claim · model-written summary
Cytokinin enhanced transcript levels of UF3GT and PAP1 in Arabidopsis.
- Taxon
- ArabidopsisArabidopsist0
- Treatment
- cytokinine0
- Gene
- UDPglucose: flavonoid 3-O-glucosyl transferase (UF3GT) and regulatory gene PRODUCTION OF ANTHOCYANIN PIGMENT 1 (PAP1)e0
- Outcome
- transcript levelse0
- Direction
- enhancese0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“We showed that cytokinin enhances anthocyanin content and transcript levels of sugar inducible structural gene UDPglucose: flavonoid 3-O-glucosyl transferase (UF3GT) and regulatory gene PRODUCTION OF ANTHOCYANIN PIGMENT 1 (PAP1).”
t0“Arabidopsis”
Claim · model-written summary
ARR1, ARR10 and ARR12 redundantly mediate cytokinin modulation of sugar-induced anthocyanin biosynthesis.
- Taxon
- ArabidopsisArabidopsist0
- Gene
- ARR1, ARR10 and ARR12e0
- Outcome
- sugar-induced anthocyanin biosynthesise0
- Qualifier
- in a redundant mannere0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Genetic analysis showed that cytokinin signaling modulates sugar-induced anthocyanin biosynthesis through a two-component signaling cascade involving the type-B response regulators ARR1, ARR10 and ARR12 in a redundant manner.”
t0“Arabidopsis”
Claim · model-written summary
Cytokinin enhancement partially depends on HY5 but mainly on photosynthetic electron transport.
- Taxon
- ArabidopsisArabidopsist0
- Gene
- HY5e0
- Outcome
- cytokinin enhancemente0
- Qualifier
- mainly on photosynthetic electron transporte0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Genetic, physiological and molecular biological approaches demonstrated that cytokinin enhancement is partially dependent on phytochrome and cryptochrome downstream component HY5, but mainly on photosynthetic electron transport.”
t0“Arabidopsis”
Claim · model-written summary
The authors propose that cytokinin acts downstream of photosynthetic electron transport, where sugars modulate plastoquinone redox poise independently of photoreceptors.
- Taxon
- ArabidopsisArabidopsist0
- Treatment
- sugarse0
- Outcome
- plastoquinone redox poisee0
- Qualifier
- photoreceptor independent mannere0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Taken together, we suggest that cytokinin acts down-stream of the photosynthetic electron transport chain in which the plastoquinone redox poise is modulated by sugars in a photoreceptor independent manner.”
t0“Arabidopsis”
The same questions in other papers
class · molecular: expression · ArabidopsisPositive and negative results
45 papers in the same direction as this paper · 28 in the opposite direction · 1 reporting no difference from an alternative
- positive
- negative
- negative
71 papers more in this group
See all 75 papers →class · quality: phytochemicals · ArabidopsisResults agree
2 papers in the same direction as this paper
- positive
- 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.