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Plasmatubules: fact or artefact?

N J Chaffey1, N Harris

  • 1Department of Botany, University of Durham, DH1 3LE, Durham, UK.

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|November 19, 2013
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Summary
This summary is machine-generated.

Plasmatubules, tubular extensions of cell membranes in barley, are confirmed as real structures. Various fixation methods, including aldehyde, osmium, and freeze-fixation, support their authentic existence in plant cells.

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Area of Science:

  • Plant cell biology
  • Plant physiology
  • Microscopy techniques

Background:

  • Plasmatubules are membrane structures involved in solute transport between plant cells.
  • Their structural integrity and reality have been questioned due to potential fixation artifacts.

Purpose of the Study:

  • To investigate the structural reality of plasmatubules in barley scutellar epithelial cells.
  • To evaluate the impact of different fixation methods on plasmatubule preservation.

Main Methods:

  • Examined plasmatubules using various fixation techniques: aqueous fixation (aldehyde, osmium, potassium permanganate) and freeze-fixation.
  • Compared ultrastructural images obtained from different fixation protocols.

Main Results:

  • Aldehyde and osmium fixation methods yielded comparable plasmatubule images.
  • Freeze-fixation also produced similar results, supporting the authenticity of plasmatubules.
  • Potassium permanganate fixation caused tissue distortion and plasmatubule dilation.

Conclusions:

  • Plasmatubules are real cellular structures, not artifacts of fixation.
  • Aldehyde, osmium, and freeze-fixation are reliable methods for studying plasmatubules.