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LIGHT CONTROL OF SEEDLING DEVELOPMENT.

Albrecht Von Arnim1, Xing-Wang Deng

  • 1Department of Biology, Yale University, New Haven, Connecticut 06520-8104.

Annual Review of Plant Physiology and Plant Molecular Biology
|June 1, 1996
PubMed
Summary
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Light influences plant seedling development through photomorphogenesis, distinct from dark-grown skotomorphogenesis. Molecular interactions between photoreceptors and regulators guide these crucial developmental changes.

Area of Science:

  • Plant biology
  • Molecular genetics
  • Developmental biology

Background:

  • Plant development exhibits distinct patterns under light (photomorphogenesis) versus darkness (skotomorphogenesis or etiolation).
  • These developmental pathways involve complex gene expression, cellular differentiation, and organ morphology changes.
  • Photoreceptors and downstream regulators mediate light's control over plant development.

Purpose of the Study:

  • To review recent advances in understanding light control of seedling development.
  • To highlight working models of light-mediated cellular development.
  • To focus on seedling morphogenesis in Arabidopsis thaliana and other species.

Main Methods:

  • Molecular genetic studies in model organisms like Arabidopsis thaliana.

Related Experiment Videos

  • Analysis of gene expression, cellular differentiation, and organ morphology.
  • Review of existing literature on photoreceptor function and downstream regulation.

    • Main Results:

    • Significant progress has been made in identifying roles of individual photoreceptors.
    • Downstream regulators mediating light control of seedling development are increasingly defined.
    • Working models illustrate the molecular interactions coupling photoreceptors to developmental decisions.

    Conclusions:

    • Light plays a critical role in regulating plant seedling morphogenesis.
    • Molecular genetic approaches have greatly advanced our understanding of photomorphogenesis.
    • Further research continues to refine models of light-regulated plant development.