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. 1992 Jan;98(1):279–286. doi: 10.1104/pp.98.1.279

Flow Cytometric Analysis of Rhodamine 123 Fluorescence during Modulation of the Membrane Potential in Plant Mitochondria

Patrice X Petit 1,2
PMCID: PMC1080180  PMID: 16668625

Abstract

The fluorescent dye rhodamine 123, which selectively accumulates in mitochondria based on the membrane potential, was used with flow cytometry to evaluate variations in activity of mitochondria isolated from plant tissues. In the presence of succinate and ATP, potato (Solanum tuberosum L.) tuber mitochondrial activity was affected by metabolic inhibitors and compounds that modify the membrane potential. The more uniform the mitochondrial population, the higher the observed membrane potential. The reactive population corresponds to the proportion of intact mitochondria (94-97%) defined by classic methods. Changes in the light-scattering properties are more related to internal modifications affecting the inner membrane-matrix system of the mitochondria during metabolic modulation than to specific volume change or outer membrane surface modifications. We tested our approach using an Arum maculatum preparation that contains three different types of mitochondria and demonstrated the validity of the light-scatter measurements to distinguish the α, β, and [ill] mitochondria and to measure their ability to built up a membrane potential in the presence of succinate. These results demonstrate clearly that flow cytometric techniques using rhodamine 123 can be employed to study the activity in isolated plant mitochondria.

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Selected References

These references are in PubMed. This may not be the complete list of references from this article.

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