Abstract
Anthocyanin pigmentation in leaves, flowers, and fruit imparts violet to black color and enhances both ornamental and culinary appeal. Shades of violet to black pigmentation in Capsicum annuum L. are attributed to anthocyanin accumulation. Anthocyanin production is markedly influenced by numerous environmental factors, including temperature and light stress. The objective of this study was to determine the genetic basis for differences in C. annuum anthocyanin content in response to varying environments. Growth experiments conducted under controlled environment conditions demonstrated that anthocyanin concentration was significantly higher in mature leaves in comparison with immature leaves under high light (435 μmol·s −1 ·m −2 ) conditions. High (30 °C day/25 °C night) versus low (20 °C day/15 °C night) temperature had no significant effect on anthocyanin concentration regardless of leaf maturity stage. Foliar anthocyanin concentration in plants grown under short days (10 h) with low light intensity (215 μmol·s −1 ·m −2 ) was significantly less than under long days (16 h) with low light. Under high light intensity, daylength had no effect on anthocyanin content. Three structural genes [chalcone synthase ( Chs ), dihydroflavonol reductase ( Dfr ), anthocyanin synthase ( Ans )] and three regulatory genes ( Myc , Myb A , Wd40 ) were selected for comparison under inductive and noninductive environmental conditions for anthocyanin accumulation. Expression of Chs, Dfr , and Ans was significantly higher in mature leaves in comparison with younger leaves. Consistent with anthocyanin concentration, temperature had no effect on structural gene expression, whereas light positively influenced expression. Under low light conditions, temperature had no effect on Myc , Myb A , and Wd40 expression; whereas under high light conditions, temperature only had an effect on Myb A expression. The study of anthocyanin leaf pigmentation in C. annuum under inductive and noninductive environments provides a new approach for elucidating the molecular genetic basis of epistatic gene interactions and the resulting phenotypic plasticity.
Abstract from the paper’s OpenAlex record, shown for indexing and research. Copyright remains with the authors or the publisher. Read at the source ↗
The text the model read, with the source record’s inline markup (italics, sub- and superscripts) rendered and its character entities decoded; quote offsets refer to the raw text.
Claims 7
Claim · model-written summary
Anthocyanin concentration was significantly higher in mature leaves than in immature leaves under high light.
- Taxon
- Capsicum annuum
Capsicum annuumt0 - Organ / stage
- mature leavese1
- Outcome
- anthocyanin concentratione1
- Direction
- significantly highere1
- Comparator
- immature leavese1
- Setting
- under high lighte1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Capsicum annuum”
e1“anthocyanin concentration was significantly higher in mature leaves in comparison with immature leaves under high light”
Claim · model-written summary
High versus low temperature had no significant effect on anthocyanin concentration in C. annuum leaves.
- Taxon
- Capsicum annuumCapsicum annuumt0
- Treatment
- High (30 °C day/25 °C night) versus low (20 °C day/15 °C night) temperaturee2
- Outcome
- anthocyanin concentratione2
- Direction
- no significant effecte2
- Comparator
- low (20 °C day/15 °C night) temperaturee2
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Capsicum annuum”
e2“High (30 °C day/25 °C night) versus low (20 °C day/15 °C night) temperature had no significant effect on anthocyanin concentration regardless of leaf maturity stage”
Claim · model-written summary
Short days (10 h) with low light significantly reduced foliar anthocyanin concentration compared with long days (16 h) with low light.
- Taxon
- Capsicum annuumCapsicum annuumt0
- Treatment
- short days (10 h)e0
- Outcome
- Foliar anthocyanin concentratione0
- Direction
- significantly lesse3
- Comparator
- long days (16 h)e3
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Capsicum annuum”
e0“Foliar anthocyanin concentration in plants grown under short days (10 h)”
e3“was significantly less than under long days (16 h) with low light”
Claim · model-written summary
Chs, Dfr and Ans expression was significantly higher in mature leaves than in younger leaves.
- Taxon
- Capsicum annuumCapsicum annuumt0
- Organ / stage
- mature leavese4
- Gene
- Chs, Dfr , and Anse4
- Outcome
- expressione4
- Direction
- significantly highere4
- Comparator
- younger leavese4
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Capsicum annuum”
e4“Expression of Chs, Dfr , and Ans was significantly higher in mature leaves in comparison with younger leaves”
Claim · model-written summary
Light positively influenced structural gene expression in C. annuum leaves.
- Taxon
- Capsicum annuumCapsicum annuumt0
- Treatment
- lighte5
- Outcome
- structural gene expressione5
- Direction
- positively influencede5
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Capsicum annuum”
e5“Consistent with anthocyanin concentration, temperature had no effect on structural gene expression, whereas light positively influenced expression”
Claim · model-written summary
Under low light, temperature had no effect on Myc, Myb A and Wd40 expression in C. annuum.
- Taxon
- Capsicum annuumCapsicum annuumt0
- Treatment
- temperaturee6
- Gene
- Myc , Myb A , and Wd40e6
- Outcome
- Myc , Myb A , and Wd40 expressione6
- Direction
- had no effecte6
- Setting
- Under low light conditionse6
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Capsicum annuum”
e6“Under low light conditions, temperature had no effect on Myc , Myb A , and Wd40 expression”
Claim · model-written summary
Under high light, temperature had an effect on Myb A expression only.
- Taxon
- Capsicum annuumCapsicum annuumt0
- Treatment
- temperaturee7
- Gene
- Myb Ae7
- Outcome
- Myb A expressione7
- Direction
- only had an effecte7
- Setting
- under high light conditionse7
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Capsicum annuum”
e7“whereas under high light conditions, temperature only had an effect on Myb A expression”
The same questions in other papers
light · molecular: expression · Capsicum annuum (sweet pepper)Results 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.