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Differentially evolved glucosyltransferases determine natural variation of rice flavone accumulation and UV-tolerance

Author

Listed:
  • Meng Peng

    (Huazhong Agricultural University)

  • Raheel Shahzad

    (Huazhong Agricultural University)

  • Ambreen Gul

    (Huazhong Agricultural University)

  • Hizar Subthain

    (Huazhong Agricultural University)

  • Shuangqian Shen

    (Huazhong Agricultural University)

  • Long Lei

    (Huazhong Agricultural University)

  • Zhigang Zheng

    (Huazhong Agricultural University)

  • Junjie Zhou

    (Huazhong Agricultural University)

  • Dandan Lu

    (Huazhong Agricultural University)

  • Shouchuang Wang

    (Huazhong Agricultural University)

  • Elsayed Nishawy

    (Huazhong Agricultural University
    Egyptian Deserts Gene Bank)

  • Xianqing Liu

    (Huazhong Agricultural University)

  • Takayuki Tohge

    (Nara Institute of Science and Technology, Ikoma)

  • Alisdair R. Fernie

    (Max-Planck-Institute of Molecular Plant Physiology)

  • Jie Luo

    (Huazhong Agricultural University
    Hainan University)

Abstract

Decoration of phytochemicals contributes to the majority of metabolic diversity in nature, whereas how this process alters the biological functions of their precursor molecules remains to be investigated. Flavones, an important yet overlooked subclass of flavonoids, are most commonly conjugated with sugar moieties by UDP-dependent glycosyltransferases (UGTs). Here, we report that the natural variation of rice flavones is mainly determined by OsUGT706D1 (flavone 7-O-glucosyltransferase) and OsUGT707A2 (flavone 5-O-glucosyltransferase). UV-B exposure and transgenic evaluation demonstrate that their allelic variation contributes to UV-B tolerance in nature. Biochemical characterization of over 40 flavonoid UGTs reveals their differential evolution in angiosperms. These combined data provide biochemical insight and genetic regulation into flavone biosynthesis and additionally suggest that adoption of the positive alleles of these genes into breeding programs will likely represent a potential strategy aimed at producing stress-tolerant plants.

Suggested Citation

  • Meng Peng & Raheel Shahzad & Ambreen Gul & Hizar Subthain & Shuangqian Shen & Long Lei & Zhigang Zheng & Junjie Zhou & Dandan Lu & Shouchuang Wang & Elsayed Nishawy & Xianqing Liu & Takayuki Tohge & A, 2017. "Differentially evolved glucosyltransferases determine natural variation of rice flavone accumulation and UV-tolerance," Nature Communications, Nature, vol. 8(1), pages 1-12, December.
    • Handle: RePEc:nat:natcom:v:8:y:2017:i:1:d:10.1038_s41467-017-02168-x
    DOI: 10.1038/s41467-017-02168-x
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