Abstract
Chlorophylls and carotenoids are 2 pivotal photosynthetic pigments directly influencing the economic value of pepper (Capsicum annuum L.) fruits. However, the coordinated regulatory mechanisms governing the accumulation of both chlorophylls and carotenoids during pepper fruit development remain elusive. In this study, pepper B-box 10 (CaBBX10), a candidate hub transcription factor, was found to play dual roles in the early development of pepper fruit. CaBBX10 virus-induced gene silencing and overexpression experiments demonstrated that the encoded transcription factor promotes both chlorophyll and carotenoid accumulation in pepper fruit. Further comprehensive analyses showed that CaBBX10 directly binds to the promoter of magnesium chelatase subunit D subunit (CaCHLD) and phytoene synthase 1 (CaPSY1), thereby activating their expression in the chlorophyll and carotenoid biosynthesis pathways, respectively. Additionally, the photomorphogenic factor CaCOP1 was found to physically interact with CaBBX10 and lead to its degradation. Therefore, CaBBX10 may serve as a critical link connecting chlorophyll and carotenoid biosynthesis to light signaling. Altogether, our findings reveal a mechanism for the complex transcriptional regulation that simultaneously promotes chlorophyll and carotenoid accumulation in pepper fruit.
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Claims 5
Claim · model-written summary
CaBBX10 promoted chlorophyll and carotenoid accumulation in pepper fruit.
- Taxon
- Capsicum annuum L.
Capsicum annuume1 - Organ / stage
- fruite0
- Treatment
- CaBBX10 virus-induced gene silencing and overexpressione0
- Gene
- CaBBX10e0
- Outcome
- chlorophyll and carotenoid accumulatione0
- Direction
- promotese0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“CaBBX10 virus-induced gene silencing and overexpression experiments demonstrated that the encoded transcription factor promotes both chlorophyll and carotenoid accumulation in pepper fruit.”
e1“pepper (Capsicum annuum L.) fruits”
Claim · model-written summary
CaBBX10 bound the CaCHLD promoter and activated chlorophyll pathway expression.
- Taxon
- Capsicum annuum L.Capsicum annuume1
- Gene
- CaCHLDe0
- Outcome
- activating their expression in the chlorophylle0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“CaBBX10 directly binds to the promoter of magnesium chelatase subunit D subunit (CaCHLD) and phytoene synthase 1 (CaPSY1), thereby activating their expression in the chlorophyll and carotenoid biosynthesis pathways, respectively.”
e1“pepper (Capsicum annuum L.) fruits”
Claim · model-written summary
CaBBX10 bound the CaPSY1 promoter and activated carotenoid pathway expression.
- Taxon
- Capsicum annuum L.Capsicum annuume1
- Gene
- CaPSY1e0
- Outcome
- carotenoid biosynthesis pathwayse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“CaBBX10 directly binds to the promoter of magnesium chelatase subunit D subunit (CaCHLD) and phytoene synthase 1 (CaPSY1), thereby activating their expression in the chlorophyll and carotenoid biosynthesis pathways, respectively.”
e1“pepper (Capsicum annuum L.) fruits”
Claim · model-written summary
CaCOP1 physically interacted with CaBBX10 and led to its degradation.
- Taxon
- Capsicum annuum L.Capsicum annuume1
- Gene
- CaCOP1e0
- Outcome
- degradatione0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“CaCOP1 was found to physically interact with CaBBX10 and lead to its degradation.”
e1“pepper (Capsicum annuum L.) fruits”
Claim · model-written summary
The authors suggest CaBBX10 links pigment biosynthesis to light signaling.
- Taxon
- Capsicum annuum L.Capsicum annuume1
- Gene
- CaBBX10e0
- Outcome
- critical link connecting chlorophyll and carotenoid biosynthesis to light signalinge0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“CaBBX10 may serve as a critical link connecting chlorophyll and carotenoid biosynthesis to light signaling.”
e1“pepper (Capsicum annuum L.) fruits”
The same questions in other papers
loss of function · physiology: pigments · Capsicum annuum (sweet pepper)Positive and negative results
2 in the opposite direction
- negative
- 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.