Abstract
The melon (Cucumis melo L.) is an economically important fruit crop around the world. Its colorful and diverse fruit peels also possess remarkable aesthetic value. The G2-like transcription factors (GLKs) play a pivotal role in regulating the fruit peel color. However, the melon's GLKs have not been comprehensively analyzed. In this study, a total of 37 CmGLK genes were identified and further categorized into four distinct subfamilies: I, II, III, and IV. The organ-specific gene expression revealed that CmAPRR2;1 specifically and highly expressed in fruit tissues. It belongs to Cluster I subfamily. This subfamily contains three key genes CmGLK1, CmAPRR2;1 and CmAPRR2;2, which have been proved to be involved in chlorophyll accumulation. Furthermore, our findings indicated that the fruit bagging treatment harmed the color formation of melon peel and flesh by significantly reducing the accumulation of chlorophyll a (Chla), chlorophyll b (Chlb), and carotenoid (Car). Additionally, the expression level of CmAPRR2;1 is directly linked to the intensity of peel color. The subcellular localization and transactivation assays demonstrated that CmAPRR2;1 was a transcriptional activator localized within the nucleus. Therefore, we conclude that CmAPRR2;1 plays a pivotal role in regulating chlorophyll accumulation of melon fruit. These findings offer valuable insights for further exploring the molecular mechanisms underlying peel color formation in melon.
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Claims 8
Claim · model-written summary
Thirty-seven melon CmGLK genes were identified and grouped into four subfamilies.
- Taxon
- melon
.jpg?width=60)
Cucumis melot0 - Gene
- CmGLKe0
- Outcome
- CmGLK genese0
- Value
- 37e0
- Qualifier
- four distinct subfamilies: I, II, III, and IVe0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
.jpg?width=500)
Verbatim
e0“a total of 37 CmGLK genes were identified and further categorized into four distinct subfamilies: I, II, III, and IV”
t0“melon fruit”
Claim · model-written summary
CmAPRR2;1 was specifically and highly expressed in melon fruit tissues.
- Taxon
- melonCucumis melot0
- Organ / stage
- fruit tissuese0
- Gene
- CmAPRR2;1e0
- Outcome
- expressed in fruit tissuese0
- Direction
- highlye0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“CmAPRR2;1 specifically and highly expressed in fruit tissues”
t0“melon fruit”
Claim · model-written summary
The Cluster I genes CmGLK1, CmAPRR2;1 and CmAPRR2;2 were implicated in chlorophyll accumulation.
- Taxon
- melonCucumis melot0
- Gene
- CmGLK1, CmAPRR2;1 and CmAPRR2;2e0
- Outcome
- chlorophyll accumulatione0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“This subfamily contains three key genes CmGLK1, CmAPRR2;1 and CmAPRR2;2, which have been proved to be involved in chlorophyll accumulation”
t0“melon fruit”
Claim · model-written summary
Fruit bagging significantly reduced melon fruit chlorophyll a, chlorophyll b and carotenoid accumulation.
- Taxon
- melonCucumis melot0
- Organ / stage
- melon peel and fleshe0
- Treatment
- fruit bagging treatmente0
- Outcome
- accumulation of chlorophyll a (Chla), chlorophyll b (Chlb), and carotenoid (Car)e0
- Direction
- reducinge0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the fruit bagging treatment harmed the color formation of melon peel and flesh by significantly reducing the accumulation of chlorophyll a (Chla), chlorophyll b (Chlb), and carotenoid (Car)”
t0“melon fruit”
Claim · model-written summary
Fruit bagging harmed color formation in melon peel and flesh.
- Taxon
- melonCucumis meloe0
- Treatment
- fruit bagging treatmente0
- Outcome
- color formation of melon peel and fleshe0
- Direction
- harmede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the fruit bagging treatment harmed the color formation of melon peel and flesh”
t0“melon fruit”
Claim · model-written summary
CmAPRR2;1 expression level was directly linked to melon peel color intensity.
- Taxon
- melonCucumis melot0
- Gene
- CmAPRR2;1e0
- Outcome
- intensity of peel colore0
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the expression level of CmAPRR2;1 is directly linked to the intensity of peel color”
t0“melon fruit”
Claim · model-written summary
CmAPRR2;1 localized to the nucleus and acted as a transcriptional activator.
- Taxon
- melonCucumis melot0
- Gene
- CmAPRR2;1e0
- Outcome
- transcriptional activator localized within the nucleuse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“CmAPRR2;1 was a transcriptional activator localized within the nucleus”
t0“melon fruit”
Claim · model-written summary
The authors concluded that CmAPRR2;1 regulates chlorophyll accumulation in melon fruit.
- Taxon
- melonCucumis meloe0
- Gene
- CmAPRR2;1e0
- Outcome
- chlorophyll accumulation of melon fruite0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“CmAPRR2;1 plays a pivotal role in regulating chlorophyll accumulation of melon fruit”
t0“melon fruit”
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- positive
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