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Lateral Root Inducible System in Arabidopsis and Maize
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Arabidopsis AIR12 influences root development.

Shawn W Gibson1, Christopher D Todd1

  • 1Department of Biology, University of Saskatchewan, 112 Science Place, Saskatoon, SK S7N 5E2 Canada.

Physiology and Molecular Biology of Plants : an International Journal of Functional Plant Biology
|November 25, 2015
PubMed
Summary

The Arabidopsis AUXIN INDUCED IN ROOTS (AIR 12) protein links plant hormone and reactive oxygen signaling. Its absence enhances stress tolerance and alters root development, suggesting a key physiological role.

Keywords:
ArabidopsisAuxinGerminationReactive oxygenRoot development

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Area of Science:

  • Plant molecular biology
  • Plant physiology
  • Biochemistry

Background:

  • Arabidopsis AUXIN INDUCED IN ROOTS (AIR 12) is a predicted glycosylphosphatidylinositol-anchored protein.
  • Its association with extracellular redox processes is known, but its physiological role remains unclear.

Purpose of the Study:

  • To investigate the physiological role of AIR 12 in Arabidopsis thaliana.
  • To understand AIR 12's involvement in plant stress responses and root development.

Main Methods:

  • Analysis of an air12 mutant line.
  • Assessing germination rates under various abiotic stresses and hormone treatments.
  • Evaluating primary and lateral root development.
  • Measuring root catalase activity and superoxide production.

Main Results:

  • The air12 mutant exhibited increased germination rates under abiotic stress and with certain hormones (excluding ABA).
  • Disruption of AIR 12 impacted primary and lateral root growth.
  • Changes in root catalase activity and superoxide production were observed in the air12 mutant.

Conclusions:

  • AIR 12 is suggested to be an extracellular component connecting plant hormone and reactive oxygen signaling pathways.
  • The study highlights AIR 12's role in mediating plant responses to environmental stimuli and developmental processes.