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Beyond flexibility: controlling stem cells in an ever changing environment.

Anne Pfeiffer1, Christian Wenzl1, Jan U Lohmann1

  • 1Department of Stem Cell Biology, Centre for Organismal Studies, University of Heidelberg, D-69120 Heidelberg, Germany.

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Plants adapt to environments through developmental plasticity, maintaining stem cells in shoot apical meristems. This review explores how mechanical and environmental factors regulate meristem activity for plant growth and adaptation.

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Area of Science:

  • Plant Biology
  • Developmental Biology
  • Ecology

Background:

  • Plants exhibit developmental plasticity, enabling adaptation to diverse ecosystems.
  • Postembryonic development relies on lifelong stem cell maintenance within meristems.
  • The shoot apical meristem (SAM) is a dynamic structure generating above-ground tissues.

Purpose of the Study:

  • To review the core regulatory program of the shoot apical meristem (SAM).
  • To discuss advancements in understanding mechanical and environmental control of SAM activity.
  • To highlight the role of SAM in plant adaptation and development.

Main Methods:

  • This is a review article, synthesizing existing research.
  • Focuses on established knowledge regarding plant meristem regulation.
  • Integrates findings from molecular, cellular, and ecological studies.

Main Results:

  • The SAM maintains functionally distinct subdomains despite continuous cell division.
  • Subdomain sizes are modulated by developmental and environmental cues.
  • Mechanical and environmental signals play crucial roles in regulating SAM activity.

Conclusions:

  • The shoot apical meristem's plasticity is key to plant adaptation.
  • Understanding SAM regulation provides insights into plant growth and survival.
  • Further research into mechanical and environmental controls is essential for plant science.