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Related Experiment Videos

Electrical resistances of corn root segments.

W P Anderson1, N Higinbotham

  • 1Department of Botany, Washington State University, Pullman, Washington 99163.

Plant Physiology
|February 1, 1976
PubMed
Summary
This summary is machine-generated.

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Electrical resistance in corn (Zea mays L.) roots varies with length, peaking in the 2-4 cm segment. The cortex offers the least resistance, despite the stele

Area of Science:

  • Plant Physiology
  • Root Biology
  • Biophysics

Background:

  • Understanding root electrical properties is crucial for plant physiology.
  • Electrical resistance can provide insights into root structure and function.

Purpose of the Study:

  • To measure longitudinal electrical resistance in corn (Zea mays L.) root segments.
  • To identify variations in resistance along the root axis.
  • To determine the primary pathway of electrical resistance in the root.

Main Methods:

  • Measured longitudinal electrical resistance on 2-cm root segments from corn (Zea mays L.) at varying distances from the apex.
  • Analyzed isolated root cortical sleeves and steles to compare specific resistances.

Main Results:

Related Experiment Videos

  • Segment resistances ranged from 400 to 100 kilohms per centimeter from apex to 18 cm.
  • Maximum resistance was observed in the 2- to 4-centimeter segment, decreasing towards the root base.
  • The root cortex presented the pathway of least electrical resistance due to its larger cross-sectional area.
  • The specific resistance of the older stele was lower than that of the cortex.

Conclusions:

  • Electrical resistance in corn roots is not uniform along the root length.
  • The root cortex is the primary conductor of electricity.
  • Electrical resistance measurements alone are insufficient to determine the anatomical state of the xylem.