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Integrative analysis of metabolome and transcriptome reveals the mechanism of color formation in pepper fruit (Capsicum annuum L.).

Authors
  • Liu, Yuhua1
  • Lv, Junheng2
  • Liu, Zhoubin3
  • Wang, Jing4
  • Yang, Bozhi5
  • Chen, Wenchao5
  • Ou, Lijun6
  • Dai, Xiongze7
  • Zhang, Zhuqing8
  • Zou, Xuexiao9
  • 1 Longping Branch, Graduate School of Hunan University, Changsha, Hunan 410125, China; Vegetable Institution of Hunan Academy of Agricultural Science, Changsha, Hunan 410125, China. Electronic address: [email protected] , (China)
  • 2 Longping Branch, Graduate School of Hunan University, Changsha, Hunan 410125, China; Vegetable Institution of Hunan Academy of Agricultural Science, Changsha, Hunan 410125, China. Electronic address: [email protected] , (China)
  • 3 Longping Branch, Graduate School of Hunan University, Changsha, Hunan 410125, China; Vegetable Institution of Hunan Academy of Agricultural Science, Changsha, Hunan 410125, China. , (China)
  • 4 Longping Branch, Graduate School of Hunan University, Changsha, Hunan 410125, China. , (China)
  • 5 Vegetable Institution of Hunan Academy of Agricultural Science, Changsha, Hunan 410125, China. , (China)
  • 6 College of Horticulture and Landscape, Hunan Agricultural University, Changsha, Hunan 410128, China. , (China)
  • 7 College of Horticulture and Landscape, Hunan Agricultural University, Changsha, Hunan 410128, China. Electronic address: [email protected] , (China)
  • 8 Vegetable Institution of Hunan Academy of Agricultural Science, Changsha, Hunan 410125, China. Electronic address: [email protected] , (China)
  • 9 Longping Branch, Graduate School of Hunan University, Changsha, Hunan 410125, China; College of Horticulture and Landscape, Hunan Agricultural University, Changsha, Hunan 410128, China. Electronic address: [email protected] , (China)
Type
Published Article
Journal
Food chemistry
Publication Date
Feb 15, 2020
Volume
306
Pages
125629–125629
Identifiers
DOI: 10.1016/j.foodchem.2019.125629
PMID: 31629298
Source
Medline
Keywords
Language
English
License
Unknown

Abstract

To understand the mechanism of the color formation of pepper fruit, integrative analysis of the metabolome and transcriptome profiles was performed in pepper varieties with 4 different fruit colors. A total of 188 flavonoids were identified, and most of the anthocyanins, flavonols and flavones showed markedly higher abundances in purple variety than in other varieties, which was linked to the high expression of flavonoid synthesis and regulatory genes. Using weighted gene co-expression network analyses, modules related to flavonoid synthesis and candidate genes that regulate flavonoid synthesis and transport were identified. Furthermore, the analysis of 12 carotenoids showed that the content of xanthophylls at 50 days after anthesis was significantly different between the four pepper varieties, which was resulted from the differential expressions of genes downstream of the carotenoid pathway. Our results provide new insights into the understanding of the synthesis and accumulation of flavonoids and carotenoids in pepper fruit. Copyright © 2019 Elsevier Ltd. All rights reserved.

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