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Control of chrysanthemum flowering through integration with an aging pathway

Author

Listed:
  • Qian Wei

    (China Agricultural University)

  • Chao Ma

    (China Agricultural University)

  • Yanjie Xu

    (China Agricultural University)

  • Tianle Wang

    (China Agricultural University)

  • Yiyu Chen

    (China Agricultural University)

  • Jing Lü

    (China Agricultural University)

  • Lili Zhang

    (China Agricultural University)

  • Cai-Zhong Jiang

    (Agricultural Research Service
    University of California at Davis)

  • Bo Hong

    (China Agricultural University)

  • Junping Gao

    (China Agricultural University)

Abstract

Age, as a threshold of floral competence acquisition, prevents precocious flowering when there is insufficient biomass, and ensures flowering independent of environmental conditions; however, the underlying regulatory mechanisms are largely unknown. In this study, silencing the expression of a nuclear factor gene, CmNF-YB8, from the short day plant chrysanthemum (Chrysanthemum morifolium), results in precocious transition from juvenile to adult, as well as early flowering, regardless of day length conditions. The expression of SQUAMOSA PROMOTER BINDING-LIKE (SPL) family members, SPL3, SPL5, and SPL9, is upregulated in CmNF-YB8-RNAi plants, while expression of the microRNA, cmo-MIR156, is downregulated. In addition, CmNF-YB8 is shown to bind to the promoter of the cmo-MIR156 gene. Ectopic expression of cmo-miR156, using a virus-based microRNA expression system, restores the early flowering phenotype caused by CmNF-YB8 silencing. These results show that CmNF-YB8 influences flowering time through directly regulating the expression of cmo-MIR156 in the aging pathway.

Suggested Citation

  • Qian Wei & Chao Ma & Yanjie Xu & Tianle Wang & Yiyu Chen & Jing Lü & Lili Zhang & Cai-Zhong Jiang & Bo Hong & Junping Gao, 2017. "Control of chrysanthemum flowering through integration with an aging pathway," Nature Communications, Nature, vol. 8(1), pages 1-11, December.
    • Handle: RePEc:nat:natcom:v:8:y:2017:i:1:d:10.1038_s41467-017-00812-0
    DOI: 10.1038/s41467-017-00812-0
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