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Related Experiment Videos

Flowering and determinacy in maize.

Esteban Bortiri1, Sarah Hake

  • 1Plant Gene Expression Center, UC Berkeley and USDA-ARS, 800 Buchanan Avenue, Albany, CA 94710, USA. ebortiri@berkeley.edu

Journal of Experimental Botany
|March 6, 2007
PubMed
Summary
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Maize meristems control plant organ development. Conserved genetic networks regulate meristem maintenance and organ identity, with unique pathways like sex determination in maize.

Area of Science:

  • Plant developmental biology
  • Genetics
  • Agricultural science

Background:

  • Plant organs develop from meristems, which are stem cell populations at root and shoot tips.
  • Meristems can be indeterminate (producing indefinite organs) or determinate (producing a fixed number).
  • Maize offers a unique model for studying meristem fate due to its determinate and indeterminate inflorescence meristems.

Purpose of the Study:

  • To review recent advancements in understanding meristem maintenance and organ specification in maize.
  • To highlight conserved and unique genetic pathways controlling inflorescence development in maize.
  • To discuss the utility of maize genetics and genomics for studying plant architecture.

Main Methods:

  • Review of existing literature on maize meristem genetics and development.

Related Experiment Videos

  • Comparative analysis of genetic networks (e.g., CLAVATA, ABC program) across plant species.
  • Discussion of maize mutant collections and genomic tools for gene discovery.

    • Main Results:

    • Genetic networks for meristem maintenance and organ identity, like CLAVATA and ABC, are conserved between maize (grass) and eudicots.
    • Maize and rice share conserved mechanisms for meristem maintenance and organ identity.
    • Sex determination pathways appear unique to maize, reflecting its distinct floral structures.

    Conclusions:

    • Maize serves as an excellent model for dissecting the genetic control of meristem fate and inflorescence architecture.
    • Conserved genetic pathways underscore fundamental similarities in plant development across diverse species.
    • Genomic resources in maize facilitate comparative studies and gene isolation for understanding plant evolution.