Identification and Characterization of Petal Color Change from Pink to Yellow in Chrysanthemum morifolium ‘Pink Candy’ and Its Bud Variant

Lian-Da Du, Yan-Hong Liu, Jin-Zhi Liu, Xiang-Qin Ding, Bo Hong, Da-Gang Hu and Cui-Hui Sun ()
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Lian-Da Du: National Key Laboratory of Crop Biology, College of Horticulture Science and Engineering, Shandong Agricultural University, Tai’an 271018, China
Yan-Hong Liu: National Key Laboratory of Crop Biology, College of Horticulture Science and Engineering, Shandong Agricultural University, Tai’an 271018, China
Jin-Zhi Liu: National Key Laboratory of Crop Biology, College of Horticulture Science and Engineering, Shandong Agricultural University, Tai’an 271018, China
Xiang-Qin Ding: National Key Laboratory of Crop Biology, College of Horticulture Science and Engineering, Shandong Agricultural University, Tai’an 271018, China
Bo Hong: Beijing Key Laboratory of Development and Quality Control of Ornamental Crops, Department of Ornamental Horticulture, China Agricultural University, Beijing 100193, China
Da-Gang Hu: National Key Laboratory of Crop Biology, College of Horticulture Science and Engineering, Shandong Agricultural University, Tai’an 271018, China
Cui-Hui Sun: National Key Laboratory of Crop Biology, College of Horticulture Science and Engineering, Shandong Agricultural University, Tai’an 271018, China

Agriculture, 2022, vol. 12, issue 9, 1-15

Abstract: Chrysanthemum, one of the most popular ornamental plants in the world, is renowned for its brilliant colors and multifarious flower types. Thousands of gorgeous chrysanthemum cultivars exist thanks to both traditional breeding techniques and its characteristic bud sporting. In this study, we identified a pink-to-yellow flower color-changed bud sport of the edible chrysanthemum cultivar ‘Pink Candy’. The bud variant and its parent plant bloomed at the same time, but with yellow- and pink-colored flowers, respectively. However, the two flower types exhibited strikingly different combinations and concentrations of primary and secondary metabolites, aromatic compounds, and pigments. Additionally, the expression patterns of key pigment biosynthesis genes, such as CmPAL ( p henylalanine a mmonia l yase ), CmDFR ( d ihydroflavonol 4-reductase ), CmF3H ( f lavanone 3′-hydroxylase ), CmNXS ( n eoxanthin synthase ) and CmCCD4 ( c arotenoid cleavage dioxygenase 4 ) were distinct between both flower types, helping to explain the color transformation of the mutant to some extent. Taken together, our results suggest a mechanism explaining the transformation of pink flowers to yellow flowers in the mutant bud sport. These results provide the foundation for the production of a novel chrysanthemum cultivar.

Keywords: bud sport; flower color; flavor compound; pigment biosynthesis; gene expression; chrysanthemum (search for similar items in EconPapers)
JEL-codes: Q1 Q10 Q11 Q12 Q13 Q14 Q15 Q16 Q17 Q18 (search for similar items in EconPapers)
Date: 2022
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