Abstract
Flavonoid synthases (FNSs) are key enzymes catalyzing the conversion of flavanones to flavonoids, yet their functions in citrus remain functionally uncharacterized. In this study, we identified three FNSII genes in the citrus genome. Phylogenetic analysis revealed that citrus FNSII genes share the closest evolutionary distance with apple FNSII genes. Chromosomal localization demonstrated that the three FNSII genes are distributed across two out of nine chromosomes. Gene structure analysis indicated that the majority of motifs within these three FNSII genes are highly conserved. We cloned a gene called CitFNSII-1 from citrus. Transient overexpression of CitFNSII-1 in citrus leaves significantly increased flavonoid content, while simultaneous virus-induced silencing of CitFNSII-1 led to synchronously and significantly reduced gene expression levels and flavonoid content in citrus seedlings. Through the Agrobacterium rhizogenes-mediated genetic transformation system, overexpression of CitFNSII-1 was found to markedly enhance flavonoid accumulation in hairy roots, whereas knockout of CitFNSII-1 resulted in a significant decrease in flavonoid content in hairy roots. Further experiments verified an interaction between CitFNSII-1 and the Chalcone isomerase-1 (CHI-1) protein. The results demonstrated that the flavonoid accumulation patterns of CHI-1 and CitFNSII-1 are highly similar. In conclusion, this study advances the understanding of the flavonoid biosynthesis pathway in citrus and provides a theoretical foundation for molecular breeding strategies in citrus.
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Claims 12
Claim · model-written summary
Three FNSII genes were identified in the citrus genome.
CitrusNot reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“we identified three FNSII genes in the citrus genome.”
Claim · model-written summary
Citrus FNSII genes were phylogenetically closest to apple FNSII genes.
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“citrus FNSII genes share the closest evolutionary distance with apple FNSII genes.”
Claim · model-written summary
The three citrus FNSII genes occur on two of nine chromosomes.
- Gene
- FNSII genese0
- Outcome
- distributed across two out of nine chromosomese0
- Value
- two out of nine chromosomese0
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the three FNSII genes are distributed across two out of nine chromosomes.”
t0“Citrus”
Claim · model-written summary
Most motifs in the three citrus FNSII genes were highly conserved.
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Citrus”
e0“the majority of motifs within these three FNSII genes are highly conserved.”
Claim · model-written summary
CitFNSII-1 was cloned from citrus.
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“We cloned a gene called CitFNSII-1 from citrus.”
Claim · model-written summary
Transient CitFNSII-1 overexpression significantly increased flavonoid content in citrus leaves.
- Organ / stage
- leavese0
- Treatment
- Transient overexpression of CitFNSII-1e0
- Gene
- CitFNSII-1e0
- Outcome
- flavonoid contente0
- Direction
- increasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Transient overexpression of CitFNSII-1 in citrus leaves significantly increased flavonoid content”
Claim · model-written summary
CitFNSII-1 silencing significantly reduced gene expression in citrus seedlings.
- Organ / stage
- seedlingse0
- Treatment
- virus-induced silencing of CitFNSII-1e0
- Gene
- CitFNSII-1e0
- Outcome
- gene expression levelse0
- Direction
- reducede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“simultaneous virus-induced silencing of CitFNSII-1 led to synchronously and significantly reduced gene expression levels and flavonoid content in citrus seedlings.”
Claim · model-written summary
CitFNSII-1 silencing significantly reduced flavonoid content in citrus seedlings.
- Organ / stage
- seedlingse0
- Treatment
- virus-induced silencing of CitFNSII-1e0
- Gene
- CitFNSII-1e0
- Outcome
- flavonoid contente0
- Direction
- reducede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“simultaneous virus-induced silencing of CitFNSII-1 led to synchronously and significantly reduced gene expression levels and flavonoid content in citrus seedlings.”
Claim · model-written summary
CitFNSII-1 overexpression markedly enhanced flavonoid accumulation in hairy roots.
- Organ / stage
- hairy rootse0
- Treatment
- overexpression of CitFNSII-1e0
- Gene
- CitFNSII-1e0
- Outcome
- flavonoid accumulatione0
- Direction
- enhancee0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Citrus”
e0“overexpression of CitFNSII-1 was found to markedly enhance flavonoid accumulation in hairy roots”
Claim · model-written summary
CitFNSII-1 knockout significantly decreased flavonoid content in hairy roots.
- Organ / stage
- hairy rootse0
- Treatment
- knockout of CitFNSII-1e0
- Gene
- CitFNSII-1e0
- Outcome
- flavonoid contente0
- Direction
- decreasee0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Citrus”
e0“knockout of CitFNSII-1 resulted in a significant decrease in flavonoid content in hairy roots.”
Claim · model-written summary
CitFNSII-1 interacted with CHI-1 protein.
- Gene
- CitFNSII-1e0
- Outcome
- interaction between CitFNSII-1 and the Chalcone isomerase-1 (CHI-1) proteine0
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Citrus”
e0“Further experiments verified an interaction between CitFNSII-1 and the Chalcone isomerase-1 (CHI-1) protein.”
Claim · model-written summary
CHI-1 and CitFNSII-1 showed highly similar flavonoid accumulation patterns.
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Citrus”
e0“the flavonoid accumulation patterns of CHI-1 and CitFNSII-1 are highly similar.”
The same questions in other papers
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2 papers in the same direction as this paper · 2 in the opposite direction
- positive
- positive
- negative
1 paper more in this group
See all 5 papers →loss of function · quality: phytochemicals · CitrusResults agree
1 paper in the same direction as this paper
- negative
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.