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Chinese Agricultural Science Bulletin ›› 2022, Vol. 38 ›› Issue (10): 38-45.doi: 10.11924/j.issn.1000-6850.casb2021-0493

Special Issue: 生物技术 园艺

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Ratios and Tissue Locations of Fruit Color Pigments of Capsicum annuum ‘Wenzijiao No.1’ at Different Development Stages

QU Yonghan1(), YUAN Enping2, ZHANG Xueting2, WANG Shaoxiang2, WANG Can2, ZHAO Shuiling2, LI Gang2, GU Fan3, ZHANG Hongling3, ZHAO Changling3(), LI Guiqiong3(), CHEN Qilin3   

  1. 1Institute of Ecological Environment and Resources, Academy of Agricultural Sciences of Wenshan Zhuang and Miao Autonomous Prefecture, Wenshan, Yunnan 663000
    2Institute of Vegetable Crops, Academy of Agricultural Sciences of Wenshan Zhuang and Miao Autonomous Prefecture, Wenshan, Yunnan 663000
    3College of Agronomy and Biotechnology, Yunnan Agricultural University, Kunming 650201
  • Received:2021-05-11 Revised:2022-02-10 Online:2022-04-05 Published:2022-05-23
  • Contact: ZHAO Changling,LI Guiqiong E-mail:xiaoqyh@163.com;zhaoplumblossom7@163.com;762039906@qq.com

Abstract:

This research aims to elucidate the ratios and tissue locations of the pigments of Capsicum annuum ‘Wenzijiao No.1’ fruits at different development stages, and provide reference for the application of Qiubei chili in ornamental horticulture and the breeding of new ornamental chili cultivars with novel fruit pigmentation. The fruits of the C. annuum ‘Wenzijiao No.1’ planted in Yanshan County of Wenshan Zhuang and Miao Autonomous Prefecture in Yunnan Province were used as the test materials, and the fruits were divided into five development stages, the chlorophyll content ([Chl]), carotenoid content ([Car]), total flavonoid content (TFC), total anthocyanin content (TAC) and capsanthin content ([Cap]) of the fruits were determined by using spectrophotometry, and their ratios and correlations were analyzed. Simultaneously, the tissue locations of the pigments were determined by using freehand slicing. The results indicated that, during the development process, the maximum value of [Chla]/[Chlb] of C. annuum ‘Wenzijiao No.1’ fruits appeared at the third development stage (Stage 3), the maximum values of [Chl(a+b)]/[Car], [Chl(a+b)]/TFC and [Chl(a+b)]/TAC all at Stage 2, whereas that of [Chl(a+b)]/[Cap], TFC/TAC, TFC/[Cap] and TAC/[Cap] all at Stage 1. The correlations among [Chla], [Chlb], [Chl(a+b)], [Car], TFC, TAC and [Cap] were not consistent, and among them, TAC was positively correlated with [Chl(a+b)] and TFC both at non-significant levels, but negatively correlated with [Car] at a non-significant level, whereas there was a significantly negative correlation between [Cap] and [Chl(a+b)], an extremely and significantly positive one between [Cap] and [Car], a non-significantly positive one between [Cap] and TFC, and a non-significantly negative one between [Cap] and TAC. Simultaneously, the fruit pigments were mainly located in the mesocarp cells, and the changing trend of the hue and chroma of the cells was highly consistent with that of the fruit color. So, the pigmentation of C. annuum ‘Wenzijiao No.1’ fruits results from the differentiated ratios of chlorophyll, carotenoid (including capsanthin) and flavonid (including anthocyanin) pigments in the pericarp cells at different development stages.

Key words: Capsicum annuum ‘Wenzijiao No.1’, development stage, fruit color pigment, ratio, tissue location

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