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A functionally informed evolutionary framework for the study of LRR-RLKs during stem cell maintenance.

Joseph Cammarata1,2, Michael J Scanlon3

  • 1Plant Biology Section, School of Integrative Plant Sciences, Cornell University, Ithaca, NY, USA.

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|April 26, 2020
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Summary

This study proposes a new naming scheme for plant stem cell signaling genes, based on a phylogenetic analysis of leucine-rich receptor-like kinases (LRR-RLKs). It reveals evolutionary insights into plant development and domain loss in angiosperms.

Keywords:
Leucine-rich receptor-like kinasePhylogenyStem cells

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Area of Science:

  • Plant Biology
  • Evolutionary Biology
  • Genetics

Background:

  • Plants utilize stem cells for continuous organogenesis, crucial for development and crop improvement.
  • Understanding plant stem cell regulation is key to explaining morphological diversity and agricultural applications.
  • Leucine-rich receptor-like kinases (LRR-RLKs) play significant roles in plant development.

Purpose of the Study:

  • To facilitate cross-species comparisons of gene function in plant stem cell regulation.
  • To understand the evolutionary history of stem cell regulatory pathways.
  • To propose a standardized naming scheme for stem cell signaling genes.

Main Methods:

  • Conducted a functionally informed phylogenetic analysis of LRR-RLKs and related proteins.
  • Analyzed diverse land plant model systems.
  • Integrated phylogenetic data with functional information.

Main Results:

  • A novel naming scheme for stem cell signaling genes is proposed.
  • Evidence of frequent protein domain loss was found in angiosperms, but not in bryophytes.
  • Identified close evolutionary relationships between stem cell signaling genes and immune-related genes.

Conclusions:

  • The phylogenetic framework aids in understanding the evolution of plant stem cell signaling pathways.
  • The study provides insights into the divergence of developmental and immune functions.
  • Future research can leverage this framework for cross-species comparative studies.