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Transient changes during soybean imbibition.

D J Parrish1, A C Leopold

  • 1Department of Agronomy, University of Nebraska, Lincoln, Nebraska 68583.

Plant Physiology
|June 1, 1977
PubMed
Summary
This summary is machine-generated.

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Soybean cotyledons rapidly imbibe water and leak solutes, with drier seeds showing greater loss. Physical changes, including membrane rearrangement and gas release, occur within minutes of water entry.

Area of Science:

  • Plant physiology
  • Seed biology

Background:

  • Soybean cotyledons exhibit complex water uptake and solute leakage dynamics.
  • Understanding these processes is crucial for seed viability and germination studies.

Purpose of the Study:

  • To investigate the kinetics of water imbibition and solute leakage in soybean cotyledons.
  • To characterize the initial physiological and physical changes occurring during seed germination.

Main Methods:

  • Manometric techniques and polarographic studies were used to measure respiration.
  • Water uptake and solute leakage rates were monitored over time.
  • Changes in seed volume were recorded during imbibition.

Main Results:

  • Water imbibition and solute leakage showed an initial rapid phase followed by a slower linear rate.

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  • Drier soybean seeds exhibited higher rates of both water uptake and solute leakage.
  • Respiratory activity became measurable after 10 minutes, while oxygen consumption began almost immediately.
  • Initial wetting released adsorbed gases, causing seed swelling.

    • Conclusions:

    • Significant physical alterations, including membrane restructuring and gas release, occur rapidly upon water entry.
    • These early changes influence seed permeability and volume, impacting germination potential.