Abstract：
:Marigold (Tagetes erecta L.) is an important ornamental plant with a wide variety of flower colors. Despite its economic value, few biochemical and molecular studies have explored the generation of flower color in this species. To study the mechanism underlying marigold petal color, we performed a metabolite analysis and de novo cDNA sequencing on the inbred line 'V-01' and its petal color mutant 'V-01M' at four flower developmental stages. A total of 49,217 unigenes were identified from 24 cDNA libraries. Based on our metabolites and transcriptomic analyses, we present an overview of carotenoid biosynthesis, degradation, and accumulation in marigold flowers. The carotenoid content of the yellow mutant 'V-01M' was higher than that of the orange inbred line 'V-01', and the abundances of the yellow compounds lutein, neoxanthin, violaxanthin, zeaxanthin, and antheraxanthin were significantly higher in the mutant. During flower development, the carotenoid biosynthesis genes were upregulated in both 'V-01' and 'V-01M', with no significant differences between the two lines. By contrast, the carotenoid degradation genes were dramatically downregulated in the yellow mutant 'V-01M'. We therefore speculate that the carotenoid degradation genes are the key factors regulating the carotenoid content of marigold flowers. Our research provides a large amount of transcriptomic data and insights into the marigold color metabolome.
journal_name
Sci Repjournal_title
Scientific reportsauthors
Zhang H,Zhang S,Zhang H,Chen X,Liang F,Qin H,Zhang Y,Cong R,Xin H,Zhang Zdoi
10.1038/s41598-020-73859-7subject
Has Abstractpub_date
2020-10-08 00:00:00pages
16835issue
1issn
2045-2322pii
10.1038/s41598-020-73859-7journal_volume
10pub_type
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