Abstract
Serotonin (5-hydroxytryptamine, 5-HT), an indole derivative, has a variety of physiological and developmental functions in plants. Anthocyanins play a crucial role in fruit coloring. Although light controls melatonin biosynthesis in plants, how serotonin, a melatonin precursor, contributes to anthocyanin accumulation at the molecular level remains unknown. In this study, we investigated the potential function of the 5-HT synthetase MdT5H5 in inhibiting anthocyanin accumulation in response to light. In apple fruits, light increased MdT5H5 expression and 5-HT accumulation. Anthocyanin accumulation was reduced in light-induced calli overexpressing MdT5H5, which was also supported by the observation that anthocyanins accumulate in apple fruits when MdT5H5 is transiently silenced. In addition, we identified MdbZIP23 as a repressor of MdT5H5, which promotes anthocyanin accumulation in apple fruits. These results suggest that MdbZIP23 negatively regulates MdT5H5-mediated anthocyanin accumulation, providing insight into the molecular mechanisms of photo-induced anthocyanin accumulation in apple fruits.
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Claims 6
Claim · model-written summary
Light increased MdT5H5 expression in apple fruit.
- Taxon
- apple
Malus domesticae0 - Organ / stage
- fruitse0
- Treatment
- lighte0
- Gene
- MdT5H5e0
- Outcome
- MdT5H5 expressione0
- Direction
- increasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“In apple fruits, light increased MdT5H5 expression and 5-HT accumulation”
t0“apple”
Claim · model-written summary
Light increased 5-HT accumulation in apple fruit.
- Taxon
- appleMalus domesticae0
- Organ / stage
- fruitse0
- Treatment
- lighte0
- Outcome
- 5-HT accumulatione0
- Direction
- increasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“In apple fruits, light increased MdT5H5 expression and 5-HT accumulation”
t0“apple”
Claim · model-written summary
MdT5H5 overexpression reduced anthocyanin accumulation in light-induced calli.
- Taxon
- appleMalus domesticat0
- Organ / stage
- callie0
- Treatment
- overexpressing MdT5H5e0
- Gene
- MdT5H5e0
- Outcome
- Anthocyanin accumulatione0
- Direction
- reducede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Anthocyanin accumulation was reduced in light-induced calli overexpressing MdT5H5”
t0“apple”
Claim · model-written summary
Transient MdT5H5 silencing led to anthocyanin accumulation in apple fruit.
- Taxon
- appleMalus domesticae0
- Organ / stage
- fruitse0
- Treatment
- MdT5H5 is transiently silencede0
- Gene
- MdT5H5e0
- Outcome
- anthocyanins accumulatee0
- Direction
- accumulatee0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“anthocyanins accumulate in apple fruits when MdT5H5 is transiently silenced”
t0“apple”
Claim · model-written summary
MdbZIP23 represses MdT5H5.
- Taxon
- appleMalus domesticat0
- Gene
- MdbZIP23e0
- Outcome
- MdT5H5e0
- Direction
- repressore0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“MdbZIP23 as a repressor of MdT5H5”
t0“apple”
Claim · model-written summary
MdbZIP23 promotes anthocyanin accumulation in apple fruit.
- Taxon
- appleMalus domesticae0
- Organ / stage
- fruitse0
- Gene
- MdbZIP23e0
- Outcome
- anthocyanin accumulatione0
- Direction
- promotese0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“MdbZIP23 as a repressor of MdT5H5, which promotes anthocyanin accumulation in apple fruits”
t0“apple”
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