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Physical root-soil interactions.

Evelyne Kolb1, Valérie Legué, Marie-Béatrice Bogeat-Triboulot

  • 1PMMH, UMR CNRS 7636, ESPCI Paris, PSL Research University, Sorbonne Université-UPMC, Université Paris 06, Université Paris 07, 10 rue Vauquelin, 75005 Paris, France.

Physical Biology
|October 5, 2017
PubMed
Summary
This summary is machine-generated.

Plant roots navigate soil by exerting growth pressure against mechanical resistance. This review explores soil-root interactions, combining field studies with models of root apex mechanics.

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Area of Science:

  • Agronomy
  • Soil Science
  • Biomechanics
  • Plant Morphogenesis

Background:

  • Soil's physical properties, particularly mechanical resistance, significantly influence plant root system development.
  • Understanding the interaction between soil mechanical stresses and root growth is crucial across multiple scientific disciplines.

Purpose of the Study:

  • To review macroscopic investigations of soil-root physical interactions in field settings.
  • To integrate these field observations with mechanistic modeling of individual root apex behavior.

Main Methods:

  • Review of macroscopic field investigations on soil-root physical interactions.
  • Application of simple mechanistic models derived from experiments at the root apex scale.

Main Results:

  • Root apices must generate growth pressure to penetrate resistant soils.
  • Roots can reorient growth to overcome obstacles like stones or follow soil pores.

Conclusions:

  • The physical properties of soil, especially resistance, are key regulators of root system architecture.
  • Mechanistic insights at the root apex scale can inform understanding of field-level soil-root dynamics.