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Lateral Root Inducible System in Arabidopsis and Maize
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Published on: January 14, 2016

Mechanical stimuli modulate lateral root organogenesis.

Gregory L Richter1, Gabriele B Monshausen, Alexandra Krol

  • 1Intercollege Graduate Program in Plant Biology, Pennsylvania State University, University Park, Pennsylvania 16802, USA.

Plant Physiology
|October 2, 2009
PubMed
Summary
This summary is machine-generated.

Mechanical forces, like root bending, trigger new lateral root growth in Arabidopsis plants. This process involves a calcium signal and occurs independently of shoot-derived auxin.

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Area of Science:

  • Plant Biology
  • Developmental Biology
  • Mechanobiology

Background:

  • Plants exhibit continuous postembryonic organogenesis, unlike mammals, allowing architectural adaptation to environmental cues.
  • Lateral root production is a key example of plant organogenesis, influenced by endogenous programs and environmental factors like nutrients.
  • Mechanical forces are increasingly recognized as regulators of plant development.

Purpose of the Study:

  • To investigate the role of mechanical forces in triggering lateral root formation in Arabidopsis thaliana.
  • To elucidate the signaling pathway involved in mechanically induced lateral root development.

Main Methods:

  • Arabidopsis roots were subjected to transient physical bending.
  • Calcium transients within the pericycle were monitored.
  • Mutants affecting auxin transport and signaling were analyzed.

Main Results:

  • Physical bending of Arabidopsis roots induced new lateral root formation on the convex side.
  • A 20-second bending stimulus was sufficient to initiate this developmental response.
  • Calcium transients in the pericycle were triggered by bending, and blocking these transients inhibited lateral root recruitment.
  • Mechanically induced lateral root primordium establishment was independent of shoot-derived auxin.

Conclusions:

  • Mechanical forces act as environmental triggers for lateral root production in Arabidopsis.
  • Calcium signaling plays a crucial role in translating mechanical stimuli into developmental responses in plant roots.
  • This mechanically induced pathway for lateral root formation operates independently of established auxin pathways.