The spatio‐temporal biosynthesis of floral flavonols is controlled by differential phylogenetic MYB regulators in Freesia hybrida

• DOI: 10.1111/nph.16818
• Publication Date: 2020-07-22T11:15:23Z
• Authors: Xiaotong Shan; Yueqing Li; Song Yang; Zhongzhou Yang; Meng Qiu; Ruifang Gao; Taotao Han; Xiangyu Meng; Zhengyi Xu; Li Wang; Xiang Gao
• Keywords: MYB; Flavonols; Petal

Floral flavonols play specific pivotal roles in pollinator attraction, pollen germination and fertility, addition to other functions vegetative organs. For many plants, the process of flavonol biosynthesis late flower development stages mature tissues is poorly understood, contrast early stages. It thought that this may be regulated independently subgroup 7 R2R3 MYB (SG7 MYB) transcription factors. In study, two FLS genes were shown expressed synchronously with development-specific tissue-specific Freesia hybrida. FhFLS1 contributed buds, toruses calyxes, was by four well-known SG7 proteins, designated as FhMYBFs, at least partial regulatory redundancy. FhFLS2 accounted for developed flowers petals, stamens pistils, targeted directly non protein FhMYB21L2. parallel, AtMYB21 AtMYB24 also activated AtFLS1, a gene highly Arabidopsis anthers pollen, indicating conserved MYB21 against these evolutionarily divergent angiosperm plants. Our results reveal novel synthetic mechanism underlying floral organs which exploited investigate supplementary flowers.