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Transplasma membrane electron transport in plants.

P C Misra1

  • 1Department of Biochemistry, Lucknow University, India.

Journal of Bioenergetics and Biomembranes
|June 1, 1991
PubMed
Summary

Plant cells utilize transplasma membrane electron transport, involving "Standard" and "Turbo" reductase enzymes, impacting cell growth and ion transport. This ubiquitous system uses NAD(P)H and influences cellular redox and pH.

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Area of Science:

  • Plant Cell Biology
  • Biochemistry

Background:

  • Transplasma membrane electron transport is a ubiquitous property of eukaryotic cells, particularly plant cells.
  • Electron transport enzymes have been identified in purified plasma membranes, with two main types: "Standard" and "Turbo" reductase.

Purpose of the Study:

  • To investigate the ubiquitous nature and characteristics of transplasma membrane electron transport in plant cells.
  • To identify the components and organization of electron transport systems within the plasma membrane.

Main Methods:

  • Studies utilizing highly purified plasma membranes.
  • Identification and characterization of distinct reductase activities.

Main Results:

  • Established the ubiquitous presence of transplasma membrane electron transport in plant cells.
  • Identified two types of reductase activities: "Standard" (general) and "Turbo" (inducible under iron deficiency).
  • Demonstrated that electron transport is associated with proton release, uses intracellular NAD(P)H, and affects intracellular redox status, pH, and metabolic energy.

Conclusions:

  • Transplasma membrane electron transport plays a significant role in plant cell growth and ion transport regulation.
  • The system's responsiveness to growth hormones suggests a regulatory function.
  • Further research is needed to elucidate the exact components and organization of these electron transport systems.

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