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Content Provider | Directory of Open Access Journals (DOAJ) |
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Author | Fuhua Yan Meiyan Shi Zhenyu He Lianhai Wu Xianghua Xu Min He Jiajing Chen Xiuxin Deng Yunjiang Cheng Juan Xu |
Abstract | Carotenoids in citrus fruits have health benefits and make the fruits visually attractive. Red-fleshed 'Chuhong' ('CH') and pale green-fleshed 'Feicui' ('FC') pummelo (Citrus maxima (Burm) Merr.) fruits are interesting materials for studying the mechanisms of carotenoid accumulation. In this study, particularly high contents of linear carotenes were observed in the albedo tissue, segment membranes and juice sacs of 'CH'. However, carotenoids, especially β-carotene and xanthophylls, accumulated more in the flavedo tissue of 'FC' than in that of 'CH'. Additionally, the contents of other terpenoids such as limonin, nomilin and abscisic acid significantly differed in the juice sacs at 150 days postanthesis. A dramatic increase in carotenoid production was observed at 45 to 75 days postanthesis in the segment membranes and juice sacs of 'CH'. Different expression levels of carotenogenesis genes, especially the ζ-carotene desaturase (CmZDS), β-carotenoid hydroxylase (CmBCH) and zeaxanthin epoxidase (CmZEP) genes, in combination are directly responsible for the largely different carotenoid profiles between these two pummelo fruits. The sequences of eleven genes involved in carotenoid synthesis were investigated; different alleles of seven of eleven genes might also explain the largely different carotenogenesis observed between 'CH' and 'FC'. These results enhance our understanding of carotenogenesis in pummelo fruits. |
e-ISSN | 19326203 |
DOI | 10.1371/journal.pone.0200320 |
Journal | PLoS ONE |
Issue Number | 7 |
Volume Number | 13 |
Language | English |
Publisher | Public Library of Science (PLoS) |
Publisher Date | 2018-01-01 |
Publisher Place | United States |
Access Restriction | Open |
Subject Keyword | Medicine Science |
Content Type | Text |
Resource Type | Article |
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