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Protein Phosphorylation: An Essential Role in Shoot Apical Meristem Homeostasis.

Cuicui Qi1, Qianqian Qin1, Suiwen Hou1

  • 1Gansu Province Key Laboratory of Gene Editing for Breeding, Ministry of Education on Key Laboratory of Cell Activities and Stress Adaptations, Gansu Province Ministry of Education, School of Life Sciences, Lanzhou University, Lanzhou 730000, China.

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PubMed
Summary

Protein kinases and phosphatases regulate plant growth by controlling the shoot apical meristem (SAM). These enzymes fine-tune the CLAVATA3-WUSCHEL feedback loop, crucial for plant development and crop yield.

Keywords:
CLAVATAWUSCHELphosphorylationreceptor-like kinasesshoot apical meristem

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Area of Science:

  • Plant developmental biology
  • Molecular plant science
  • Cellular signaling

Background:

  • The shoot apical meristem (SAM) is essential for aboveground plant development.
  • SAM homeostasis is maintained by the CLAVATA3 (CLV3)-WUSCHEL (WUS) negative feedback loop.
  • Reversible protein phosphorylation is a key posttranslational modification regulating SAM activity.

Purpose of the Study:

  • To review recent advances in understanding the roles of kinases and phosphatases in SAM maintenance.
  • To focus on phosphorylation-mediated control of the CLV3-WUS pathway and associated signaling networks.
  • To provide a comprehensive reference for SAM homeostasis regulatory mechanisms.

Main Methods:

  • Literature review of recent advances in kinase and phosphatase research in SAM.
  • Synthesis of molecular insights into phosphorylation-mediated control of CLV3-WUS signaling.
  • Analysis of regulatory mechanisms underlying SAM homeostasis.

Main Results:

  • Kinases and phosphatases play critical roles in modulating SAM activity through phosphorylation.
  • Phosphorylation directly impacts the CLV3-WUS feedback loop, influencing stem cell dynamics.
  • These enzymes integrate genetic, hormonal, and environmental signals to maintain SAM homeostasis.

Conclusions:

  • Understanding kinase and phosphatase roles in SAM regulation advances fundamental plant biology.
  • Targeting these phosphorylation events offers potential for improving crop architecture and agricultural productivity.
  • This review synthesizes key findings for future research in plant development and crop improvement.