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Integrated metabolomic and transcriptomic dynamic profiles of endopleura coloration during fruit maturation in three walnut cultivars.

Authors
  • Liu, Hengzhao1
  • Zhou, Huijuan2
  • Ye, Hang1
  • Gen, Fangdong1
  • Lei, Mengfan1
  • Li, Jinhan1
  • Wei, Wenjun1
  • Liu, Zhanlin1
  • Hou, Na3
  • Zhao, Peng4
  • 1 Key Laboratory of Resource Biology and Biotechnology in Western China, Ministry of Education, College of Life Sciences, Northwest University, No. 229 Tabi Rd., Xi'an, 710069, China. , (China)
  • 2 Xi'an Botanical Garden of Shaanxi Province (Institute of Botany of Shaanxi Province), Xi'an, 710061, Shaanxi, China. , (China)
  • 3 Laboratory of National Forestry and Grassland Administration on Biodiversity Conservation in Karst Mountainous Areas of Southwestern China, Guizhou Academy of Forestry, Guiyang, 55005, China. [email protected]. , (China)
  • 4 Key Laboratory of Resource Biology and Biotechnology in Western China, Ministry of Education, College of Life Sciences, Northwest University, No. 229 Tabi Rd., Xi'an, 710069, China. [email protected]. , (China)
Type
Published Article
Journal
BMC Plant Biology
Publisher
Springer (Biomed Central Ltd.)
Publication Date
Feb 14, 2024
Volume
24
Issue
1
Pages
109–109
Identifiers
DOI: 10.1186/s12870-024-04790-6
PMID: 38350847
Source
Medline
Keywords
Language
English
License
Unknown

Abstract

The color of endopleura is a vital factor in determining the economic value and aesthetics appeal of nut. Walnuts (Juglans) are a key source of edible nuts, high in proteins, amino acids, lipids, carbohydrates. Walnut had a variety endopleura color as yellow, red, and purple. However, the regulation of walnut endopleura color remains little known. To understand the process of coloration in endopleura, we performed the integrative analysis of transcriptomes and metabolomes at two developmental stages of walnut endopleura. We obtained total of 4,950 differentially expressed genes (DEGs) and 794 metabolites from walnut endopleura, which are involved in flavonoid and phenolic biosynthesis pathways. The enrichment analysis revealed that the cinnamic acid, coniferyl alcohol, naringenin, and naringenin-7-O-glucoside were important metabolites in the development process of walnut endopleura. Transcriptome and metabolome analyses revealed that the DEGs and differentially regulated metabolites (DRMs) were significantly enriched in flavonoid biosynthesis and phenolic metabolic pathways. Through co-expression analysis, CHS (chalcone synthase), CHI (chalcone isomerase), CCR (cinnamoyl CoA reductase), CAD (cinnamyl alcohol dehydrogenase), COMT (catechol-Omethyl transferase), and 4CL (4-coumaroyl: CoA-ligase) may be the key genes that potentially regulate walnut endopleura color in flavonoid biosynthesis and phenolic metabolic pathways. This study illuminates the metabolic pathways and candidate genes that underlie the endopleura coloration in walnuts, lay the foundation for further study and provides insights into controlling nut's colour. © 2024. The Author(s).

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