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Homeoboxes in plant development

R L Chan1, G M Gago, C M Palena

  • 1Area Biología Molecular, Facultad de Ciencias Bioquímicas y Farmacéuticas (UNR) and Programa Multidisciplinario de Biología Experimental (PROMUBIE, CONICET), Suipacha 531, 2000 Rosario, Argentina.

Biochimica Et Biophysica Acta
|October 10, 1998
PubMed
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Plant homeobox genes regulate crucial developmental processes. This review details their structure, function, and evolutionary divergence, highlighting roles in cell fate and differentiation.

Area of Science:

  • Molecular Biology
  • Developmental Biology
  • Genetics

Background:

  • Homeobox genes contain a conserved 180 bp DNA sequence critical for developmental processes.
  • Plant homeobox genes are diverse and play essential roles in plant growth and development.

Purpose of the Study:

  • To review the structure and function of plant homeobox genes and their encoded proteins.
  • To explore the classification and evolutionary history of plant homeobox gene families.

Main Methods:

  • Identification through mutant studies, degenerate oligonucleotide probing, differential screening, and promoter binding assays.
  • Sequence conservation analysis for subdividing homeoboxes into distinct families.
  • Evolutionary studies to determine divergence times relative to other eukaryotes.

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Main Results:

  • Plant homeobox genes are classified into families with distinct structural and functional properties.
  • Specific families like kn1-like, HD-Zip, and gl2-like are implicated in key developmental events.
  • Evolutionary analysis suggests early divergence of homeobox gene families before the plant-animal-fungi split.

Conclusions:

  • Plant homeobox genes exhibit significant diversity and evolutionary history.
  • Understanding their precise functions is crucial for manipulating plant development.
  • Further research is needed to explore the potential of homeobox genes as modifiers of plant development.