Role of anthocyanin metabolic diversity in bract coloration of Curcuma alismatifolia varieties.

Autor: Zhou Y; Guangdong Key Lab of Ornamental Plant Germplasm Innovation and Utilization, Environmental Horticulture Research Institute, Guangdong Academy of Agricultural Sciences, Guangzhou, 510640, China., Xu Y; Guangdong Key Lab of Ornamental Plant Germplasm Innovation and Utilization, Environmental Horticulture Research Institute, Guangdong Academy of Agricultural Sciences, Guangzhou, 510640, China., Tan J; Guangdong Key Lab of Ornamental Plant Germplasm Innovation and Utilization, Environmental Horticulture Research Institute, Guangdong Academy of Agricultural Sciences, Guangzhou, 510640, China., Huang L; Guangdong Key Lab of Ornamental Plant Germplasm Innovation and Utilization, Environmental Horticulture Research Institute, Guangdong Academy of Agricultural Sciences, Guangzhou, 510640, China., Zhu G; Guangdong Key Lab of Ornamental Plant Germplasm Innovation and Utilization, Environmental Horticulture Research Institute, Guangdong Academy of Agricultural Sciences, Guangzhou, 510640, China., Ye Y; Guangdong Key Lab of Ornamental Plant Germplasm Innovation and Utilization, Environmental Horticulture Research Institute, Guangdong Academy of Agricultural Sciences, Guangzhou, 510640, China. Electronic address: yeyuanjun@gdaas.cn.
Jazyk: angličtina
Zdroj: Plant physiology and biochemistry : PPB [Plant Physiol Biochem] 2024 Nov; Vol. 216, pp. 109156. Date of Electronic Publication: 2024 Sep 26.
DOI: 10.1016/j.plaphy.2024.109156
Abstrakt: Anthocyanins are one of the key metabolites influencing the coloration of ornamental bracts in plants. Curcuma alismatifolia is an emerging ornamental plant, known for the rich diversity in the coloration of its bracts and the variety of anthocyanins present. However, the specific anthocyanin metabolites contributing to this diversity are not entirely clear. This study examines the bract color variation across 19 C. alismatifolia varieties using colorimetric analysis and spectrophotometric determination of total anthocyanin content. The 19 accessions were categorized into four color groups: white, light pink, pink, and purple. Further analysis using anthocyanin metabolomics and transcriptomics was conducted on five C. alismatifolia varieties with significant differences in coloration and total anthocyanin content. In addition to previously reported anthocyanins, delphinidin-3-O-glucoside and peonidin-3-O-rutinoside were identified for the first time as important contributors to the diverse bract coloration in C. alismatifolia. Fifty-three differentially expressed genes (DEGs) were identified in the anthocyanin biosynthesis pathway, and two significant gene modules were determined through WGCNA analysis. Correlation network analysis revealed two BZ1 genes that may be key terminal enzyme genes affecting anthocyanin synthesis in C. alismatifolia bracts. Multiple transcription factors, including MYB, NAC, WRKY, ERF, and bHLH, may be involved in regulating the accumulation of different anthocyanin contents in the bracts. This research sheds light on the genetic and metabolic factors that influence bract coloration in C. alismatifolia.
Competing Interests: Declaration of competing interest The authors declare that they have no known competing financial interests or personal relationships that could have appeared to influence the work reported in this paper.
(Copyright © 2024 Elsevier Masson SAS. All rights reserved.)
Databáze: MEDLINE
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