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Peptide signals regulating leaf senescence.

Xueting Li1, Xiaolin Si1, Zhenbiao Zhang1

  • 1Tobacco Research Institute, Chinese Academy of Agricultural Sciences, Qingdao, China.

Annals of Botany
|July 12, 2025
PubMed
Summary
This summary is machine-generated.

Plant small peptides regulate leaf senescence, a key nutrient recycling process. This review details how these signaling molecules, both positive and negative regulators, influence senescence through various pathways.

Keywords:
Cell-cell communicationLeaf senescencePeptides signaling

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Area of Science:

  • Plant Biology
  • Molecular Signaling
  • Plant Physiology

Background:

  • Leaf senescence is a vital process for nutrient remobilization from aging leaves to developing tissues.
  • Plant small peptides act as crucial intercellular signals regulating diverse developmental and stress responses.
  • Emerging evidence highlights the significant role of small peptides in controlling leaf senescence progression.

Purpose of the Study:

  • To review recent research on the role of small peptides in modulating leaf senescence.
  • To elucidate the diverse signaling pathways involved in peptide-mediated leaf senescence.
  • To provide a comprehensive understanding of both positive and negative regulators of leaf senescence.

Main Methods:

  • Literature review of recent studies on small peptides and leaf senescence.
  • Analysis of identified small peptide regulators (e.g., CLE, SCOOP) and their mechanisms.
  • Examination of signaling pathways involving receptor-like kinases, reactive oxygen species (ROS), and ethylene.

Main Results:

  • Specific small peptides like CLE14 and CLE42 suppress leaf senescence by modulating ROS and ethylene.
  • Other peptides, SCOOP10 and SCOOP12, antagonistically regulate leaf senescence via the MIK2 receptor-like kinase.
  • Small peptides function as both promoters and suppressors of leaf senescence, indicating complex regulatory networks.

Conclusions:

  • Small peptides are critical regulators of leaf senescence, influencing the process through distinct signaling cascades.
  • Understanding these peptide-mediated pathways offers insights into controlling nutrient allocation and plant development.
  • Further research into small peptide signaling will deepen our comprehension of plant aging and resource management.