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Acta Horticulturae Sinica ›› 2022, Vol. 49 ›› Issue (7): 1589-1601.doi: 10.16420/j.issn.0513-353x.2021-0449

• Research Notes • Previous Articles     Next Articles

Studies on the Relationship Between Pigment Composition and Fruit Coloration of 63 Peppers

LI Pingping1,2, ZHANG Xiang1, LIU Yuting1, XIE Zhihe1, ZHANG Ruihao1, ZHAO Kai1, LÜ Junheng1, WANG Ziran1, WEN Jinfen3,**, ZOU Xuexiao4,**, DENG Minghua1,5()   

  1. 1Vegetable Seed Industry Engineering Research Center for the Universities of Yunnan Province,College of Landscape and Horticulture,Yunnan Agricultural University,Kunming 650201,China
    2Institute of Sericulture and Apiculture,Yunnan Academy of Agricultural Sciences,Mengzi,Yunnan 661101,China
    3Kunming University of Science and Technology,Kunming 650500,China
    4Hunan Agricultural University,Changsha 410128,China
    5Deng Minghua Expert Basic Scientific Research Workstation of Yuxi City,Economic Crop Workstation of Tonghai County,Tonghai,Yunnan 652700,China
  • Received:2021-12-15 Revised:2022-03-11 Online:2022-07-25 Published:2022-07-29
  • Contact: WEN Jinfen,ZOU Xuexiao E-mail:dengminghua2013@163.com

Abstract:

In order to explore the relationship between pigment composition and fruit coloration of pepper(Capsicum spp.),the International Commission on Illumination color space(CIE L*a*b*)value and chlorophyll a/b of pepper fruit was measured using a colorimeter and spectrophotometer respectively;capsanthin,zeaxanthin,β-carotene and six anthocyanidins(delphinidin,cyanidin,malvidin,peonidin, pelargonidin,petunidin)of pepper fruit was measured using HPLC method. Basing on Python language to visualize pepper fruit color,the relationship between pigment composition and fruit coloration of pepper were analysed with principal component analysis(PCA),orthogonal partial least squares(OPLS),cluster analysis and aggregated boosted tree(ABT). The results showed that 63 peppers were divided into two color groups(A and B),where A was yellow-green and B was purple-black. There is a correlation between the CIE L*a*b* value of pepper fruit and pigment composition. Zeaxanthin,chlorophyll a,and delphinidin contribute more to the CIE L*a*b* value of pepper fruit. Under the same carotenoid content,when the content of chlorophyll and delphinidin is low,the fruit is yellow-green,and when the content of delphinidin is high,the fruit is purple-black.

Key words: Capsicum, germplasm resources, fruit coloration, pigment composition

CLC Number: