Transcriptome Analysis of Key Genes Involved in Color Variation between Blue and White Flowers of .

Biomed Res Int

Flower Research Institute of Yunnan Academy of Agricultural Sciences, National Engineering Research Center For Ornamental Horticulture, Key Lab of Yunnan Flower Breeding, Kunming 650205, China.

Published: January 2023

Dykes (Southwest iris) is an extensively distributed Iridaceae species with blue or white flowers. Hereby, we performed a systematic study, employing metabolomics and transcriptomics to uncover the subtle color differentiation from blue to white in Southwest iris. Fresh flower buds from both cultivars were subjected to flavonoid/anthocyanin and carotenoid-targeted metabolomics along with transcriptomic sequencing. Among 297 flavonoids, 24 anthocyanins were identified, and 13 showed a strong down-accumulation pattern in the white flowers compared to the blue flowers. Significant downregulation of and genes involved in the glycosylation of anthocyanins was predicted to hinder the accumulation of anthocyanins, resulting in white coloration. Besides, no significant altered accumulation of carotenoids and expression of their biosynthetic genes was observed between the two cultivars. Our study systematically addressed the color differentiation in flowers, which can aid future breeding programs.

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Source
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC9876678PMC
http://dx.doi.org/10.1155/2023/7407772DOI Listing

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