Central-cell-produced attractants control fertilization recovery.

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  • Additional Information
    • Source:
      Publisher: Cell Press Country of Publication: United States NLM ID: 0413066 Publication Model: Print-Electronic Cited Medium: Internet ISSN: 1097-4172 (Electronic) Linking ISSN: 00928674 NLM ISO Abbreviation: Cell Subsets: MEDLINE
    • Publication Information:
      Publication: Cambridge, Ma : Cell Press
      Original Publication: Cambridge, MIT Press.
    • Subject Terms:
      Arabidopsis*/physiology ; Arabidopsis Proteins*; Animals ; Fertilization ; Pollen Tube ; Seeds ; Germ Cells, Plant
    • Abstract:
      Animal fertilization relies on hundreds of sperm racing toward the egg, whereas, in angiosperms, only two sperm cells are delivered by a pollen tube to the female gametes (egg cell and central cell) for double fertilization. However, unsuccessful fertilization under this one-pollen-tube design can be detrimental to seed production and plant survival. To mitigate this risk, unfertilized-gamete-controlled extra pollen tube entry has been evolved to bring more sperm cells and salvage fertilization. Despite its importance, the underlying molecular mechanism of this phenomenon remains unclear. In this study, we report that, in Arabidopsis, the central cell secretes peptides SALVAGER1 and SALVAGER2 in a directional manner to attract pollen tubes when the synergid-dependent attraction fails or is terminated by pollen tubes carrying infertile sperm cells. Moreover, loss of SALs impairs the fertilization recovery capacity of the ovules. Therefore, this research uncovers a female gamete-attraction system that salvages seed production for reproductive assurance.
      Competing Interests: Declaration of interests The authors declare no competing interests.
      (Copyright © 2023 Elsevier Inc. All rights reserved.)
    • Comments:
      Comment in: Curr Biol. 2023 Oct 9;33(19):R1013-R1015. (PMID: 37816321)
    • Contributed Indexing:
      Keywords: central cell; female gametophyte; fertilization recovery; pollen tube attractant; synergid cell
    • Accession Number:
      0 (Arabidopsis Proteins)
    • Publication Date:
      Date Created: 20230729 Date Completed: 20230824 Latest Revision: 20231106
    • Publication Date:
      20231106
    • Accession Number:
      10.1016/j.cell.2023.06.024
    • Accession Number:
      37516107