Academic Journal
Red light delays petal discoloration in Brunfelsia acuminata by regulating anthocyanin biosynthetic genes.
| Τίτλος: | Red light delays petal discoloration in Brunfelsia acuminata by regulating anthocyanin biosynthetic genes. |
|---|---|
| Συγγραφείς: | Li M; College of Horticulture, Fujian Agriculture and Forestry University, Fuzhou 350002, China; Mid-Florida Research and Education Center, Horticultural Sciences Department, Institute of Food and Agricultural Sciences (IFAS), University of Florida, 2725 S. Binion Road, Apopka, FL 32703-8504, United States of America; School of Biological and Food Engineering, Suzhou University, Suzhou 234000, China., Kui X; College of Horticulture, Fujian Agriculture and Forestry University, Fuzhou 350002, China., Debnath B; College of Horticulture, Fujian Agriculture and Forestry University, Fuzhou 350002, China., Chen X; College of Horticulture, Fujian Agriculture and Forestry University, Fuzhou 350002, China., Yang H; College of Horticulture, Fujian Agriculture and Forestry University, Fuzhou 350002, China., Chen J; Mid-Florida Research and Education Center, Horticultural Sciences Department, Institute of Food and Agricultural Sciences (IFAS), University of Florida, 2725 S. Binion Road, Apopka, FL 32703-8504, United States of America. Electronic address: jjchen@ufl.edu., Qiu D; College of Horticulture, Fujian Agriculture and Forestry University, Fuzhou 350002, China; Mid-Florida Research and Education Center, Horticultural Sciences Department, Institute of Food and Agricultural Sciences (IFAS), University of Florida, 2725 S. Binion Road, Apopka, FL 32703-8504, United States of America. Electronic address: qiudl1970@fafu.edu.cn. |
| Πηγή: | Journal of photochemistry and photobiology. B, Biology [J Photochem Photobiol B] 2026 Oct; Vol. 283, pp. 113547. Date of Electronic Publication: 2026 Aug 17. |
| Τύπος έκδοσης: | Journal Article |
| Γλώσσα: | English |
| Στοιχεία περιοδικού: | Publisher: Elsevier Sequoia Country of Publication: Switzerland NLM ID: 8804966 Publication Model: Print-Electronic Cited Medium: Internet ISSN: 1873-2682 (Electronic) Linking ISSN: 10111344 NLM ISO Abbreviation: J Photochem Photobiol B Subsets: MEDLINE |
| Imprint Name(s): | Original Publication: Lausanne : Elsevier Sequoia, 1987- |
| Ιατρικοί όροι (MeSH): | Anthocyanins*/biosynthesis , Anthocyanins*/genetics , Anthocyanins*/metabolism , Flowers*/metabolism , Flowers*/radiation effects , Light*, Gene Expression Regulation, Plant/radiation effects ; Plant Proteins/genetics ; Plant Proteins/metabolism ; Pigmentation/radiation effects ; Flavonoids/metabolism ; Acyltransferases/genetics ; Acyltransferases/metabolism ; Biosynthetic Pathways/radiation effects ; Red Light ; Blue Light ; Chromatography, High Pressure Liquid ; Color |
| Περίληψη: | Brunfelsia acuminata (Pohl) Benth. exhibits a distinctive post-anthesis transition in flower color from purple to white, which is closely associated with anthocyanin degradation. However, the photobiological mechanisms regulating pigment stability during petal senescence remain poorly understood. In this study, we investigated how different light qualities affect anthocyanin degradation, flavonoid and phenolic metabolism, and the expression of key anthocyanin biosynthetic genes in detached petals and flowers on intact plants. Among nine continuous light-quality treatments, red light most effectively delayed petal discoloration, whereas blue light accelerated anthocyanin loss. Further analyses under fluorescent, white, red, and blue light confirmed that red light consistently maintained higher anthocyanin levels, whereas blue light led to the most rapid decline in pigment levels. HPLC analysis identified malvidin 3-O-glucoside, petunidin 3-O-glucoside, and delphinidin 3-O-glucoside as the major anthocyanins, with malvidin 3-O-glucoside as the predominant pigment retained under red light. Quantitative real-time PCR analysis of key structural genes in the anthocyanin biosynthetic pathway indicated that CHS (chalcone synthase), CHI (chalcone isomerase), F3'5'H (flavonoid 3'5'-hydroxylase), DFR (dihydroflavonol 4-reductase), ANS (anthocyanidin synthase), and UGT (anthocyanidin 3-O-glucoside 2″'-O-xylosyltransferase) declined during petal senescence, but red light significantly sustained the expression of DFR, ANS, and UGT relative to blue and fluorescent light. These results suggest that red light, likely through phytochrome-mediated signaling, delays petal fading by maintaining anthocyanin biosynthetic and glycosylation capacity, thereby enhancing pigment stability, whereas blue light, likely associated with cryptochrome-related signaling and greater photochemical stress, fails to sustain these pathways and is associated with accelerated pigment degradation. This study provides mechanistic insight into light-quality regulation of anthocyanin stability and identifies red-light treatment as a non-chemical approach for preserving postharvest ornamental quality. (Copyright © 2026 Elsevier B.V. All rights reserved.) |
| Competing Interests: | Declaration of competing interest The authors declare that they have no known competing financial interests or personal relationships that could have influenced the work reported in this paper. |
| Contributed Indexing: | Keywords: Anthocyanin; Anthocyanin degradation; Brunfelsia acuminata; Flower color; Light quality; Red light |
| Substance Nomenclature: | 0 (Anthocyanins) 0 (Plant Proteins) 0 (Flavonoids) EC 2.3.- (Acyltransferases) |
| Entry Date(s): | Date Created: 20260821 Date Completed: 20260904 Latest Revision: 20260904 |
| Update Code: | 20260905 |
| DOI: | 10.1016/j.jphotobiol.2026.113547 |
| PMID: | 42628306 |
| Βάση Δεδομένων: | MEDLINE |
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