期刊
GENOMICS
卷 114, 期 2, 页码 -出版社
ACADEMIC PRESS INC ELSEVIER SCIENCE
DOI: 10.1016/j.ygeno.2022.110291
关键词
Citrus Reticulata Blanco; Transplantation; Fruits coloring; Transcriptome; Carotenoids metabolism, beta-citraurin
资金
- National Key R&D Pro-gram of China [2017YFD0202000, 2017YFD0202006-01]
- Science and Technology Major Project of Guangxi [GuiKeAA 17204045-4, GuiKeAA 17202017-2, GuiKeAA 20108003-2, GuiKeAA 20108003-4]
- Chinese Academy of Agricultural Sciences-Guangxi Academy of Agricultural Sciences Collaborative Innovation Project [CAAS-GXAAS-XTCX2019026-2]
- Earmarked Funds for the China Agriculture Research System [CARS-27]
- Guangxi Characteristic crop experi-mental station, China [GuiTS2016001]
This study investigated the effect of transplantation on the coloring of citrus fruits using RNA-Seq and carotenoid profiling. The results showed that transplantation led to a shallowing of fruit color and changes in hormone and carotenoid levels. RNA sequencing identified differentially expressed genes involved in fruit coloring, providing insights into the molecular mechanisms.
Citrus fruits exhibit vivid color and are favored extensively. However, the biochemical and molecular mechanism of Citrus Reticulata Blanco fruits coloring, especially the effect of transplantation on fruits coloring, is unclear. Herein, RNA-Seq and carotenoids profiling were applied to investigate the effect of transplantation on Orah mandarin fruits coloring. Transplantation induces fruit color shallowing, Ca2+ and ACC level declining and IAA level increasing. Transplantation induced variation in fruit skin and pulp carotenoids, mainly beta-citraurin as one of the important pigments of citrus peel. 2253 up-regulated genes, 1103 down-regulated genes in skin and 815 up-regulated genes, 534 down-regulated genes in pulp of transplanted tree fruits were identified by RNA-Seq. The DEGs involved hormone signal, carotenoids biosynthesis and TFs such as MYB and bHLH family TFs. The carotenoid cleavage dioxygenase gene (Ciclev10028113m.g) is positively correlated with beta-citraurin and regulated directly and/or indirectly by MYB1R1, PIF4, ACC and IAA. Integrative analyses revealed potential molecular insights into Orah mandarin peel color variation during transplantation.
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