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PXL1 and SERKs act as receptor–coreceptor complexes for the CLE19 peptide to regulate pollen development

Author

Listed:
  • Ying Yu

    (Fudan University)

  • Wen Song

    (China Agricultural University
    Tsinghua University
    University of Cologne)

  • Nuo Zhai

    (Tsinghua University)

  • Shiting Zhang

    (Fudan University)

  • Jianzheng Wang

    (Fudan University)

  • Shuangshuang Wang

    (Fudan University)

  • Weijia Liu

    (Tsinghua University)

  • Chien-Hsun Huang

    (Fudan University)

  • Hong Ma

    (The Pennsylvania State University)

  • Jijie Chai

    (Tsinghua University
    University of Cologne)

  • Fang Chang

    (Fudan University)

Abstract

Gametophyte development in angiosperms occurs within diploid sporophytic structures and requires coordinated development; e.g., development of the male gametophyte pollen depends on the surrounding sporophytic tissue, the tapetum. The mechanisms underlying this interaction remain poorly characterized. The peptide CLAVATA3/EMBRYO SURROUNDING REGION-RELATED 19 (CLE19) plays a “braking” role in preventing the harmful overexpression of tapetum transcriptional regulators to ensure normal pollen development in Arabidopsis. However, the CLE19 receptor is unknown. Here, we show that CLE19 interacts directly with the PXY-LIKE1 (PXL1) ectodomain and induces PXL1 phosphorylation. PXL1 is also required for the function of CLE19 in maintaining the tapetal transcriptional regulation of pollen exine genes. Additionally, CLE19 induces the interactions of PXL1 with SOMATIC EMBRYOGENESIS RECEPTOR-LIKE KINASE (SERK) coreceptors required for pollen development. We propose that PXL1 and SERKs act as receptor and coreceptor, respectively, of the extracellular CLE19 signal, thereby regulating tapetum gene expression and pollen development.

Suggested Citation

  • Ying Yu & Wen Song & Nuo Zhai & Shiting Zhang & Jianzheng Wang & Shuangshuang Wang & Weijia Liu & Chien-Hsun Huang & Hong Ma & Jijie Chai & Fang Chang, 2023. "PXL1 and SERKs act as receptor–coreceptor complexes for the CLE19 peptide to regulate pollen development," Nature Communications, Nature, vol. 14(1), pages 1-13, December.
    • Handle: RePEc:nat:natcom:v:14:y:2023:i:1:d:10.1038_s41467-023-39074-4
    DOI: 10.1038/s41467-023-39074-4
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