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In Situ Hybridization for the Precise Localization of Transcripts in Plants
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Evolutionary developmental transcriptomics reveals a gene network module regulating interspecific diversity in plant

Yasunori Ichihashi1, José Antonio Aguilar-Martínez2, Moran Farhi2

  • 1Department of Plant Biology,Center for Sustainable Resource Science, RIKEN, Yokohama, Kanagawa 230-0045, Japan.

Proceedings of the National Academy of Sciences of the United States of America
|June 14, 2014
PubMed
Summary
This summary is machine-generated.

Researchers identified a gene regulatory network controlling leaf development. The BLADE-ON-PETIOLE (BOP) gene influences leaf complexity by altering gene interactions, explaining diverse leaf shapes in related species.

Keywords:
RNA-seqSolanum speciesbioinformatics

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Area of Science:

  • Plant developmental genetics
  • Evolutionary developmental biology
  • Comparative genomics

Background:

  • Understanding the genetic basis of morphological diversity is crucial.
  • Molecular mechanisms underlying developmental variation remain largely unknown.

Purpose of the Study:

  • To predict a gene regulatory network (GRN) for leaf development in tomato and related wild species.
  • To investigate the molecular mechanisms driving diverse leaf morphologies.

Main Methods:

  • Comparative transcriptomics
  • Gene coexpression network construction
  • Experimental perturbations of gene expression

Main Results:

  • A core leaf developmental GRN was identified, regulating global cell proliferation.
  • Peripheral gene network modules (GNMs), including BLADE-ON-PETIOLE (BOP), interact with the core network.
  • Variation in BOP expression dynamically rewires GRN interactions, explaining leaf complexity diversity.

Conclusions:

  • BOP plays a key role in canalizing leaf morphospace by modulating leaf maturation schedules.
  • Dynamic rewiring of GRN interactions by BOP is a mechanism for generating morphological diversity.
  • This study provides insights into the genetic architecture of plant evolution.