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Application of Genetically Encoded Fluorescent Nitric Oxide (NO•) Probes, the geNOps, for Real-time Imaging of NO• Signals in Single Cells
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Plant mitochondria: source and target for nitric oxide.
Abir U Igamberdiev1, R George Ratcliffe2, Kapuganti J Gupta2
1Department of Biology, Memorial University of Newfoundland, St. John's, NL, A1C 3X9, Canada.
Mitochondrion
|February 25, 2014
Summary
Plant mitochondria produce nitric oxide (NO) via reductive and oxidative pathways. This NO impacts cellular respiration, protein function, and stress adaptation in plants.
Area of Science:
- Plant Physiology
- Mitochondrial Biology
- Biochemistry
Background:
- Mitochondria are key organelles in plant energy metabolism.
- Nitric oxide (NO) is a signaling molecule with diverse roles in plants.
- Mitochondrial NO production mechanisms and consequences are not fully understood.
Purpose of the Study:
- To review the mechanisms of nitric oxide (NO) production in plant mitochondria.
- To discuss the consequences of mitochondrial NO production on cellular processes.
- To explore the role of mitochondrial NO in plant stress adaptation.
Main Methods:
- Literature review of existing studies on plant mitochondrial NO.
- Analysis of biochemical pathways involved in NO synthesis and action.
- Synthesis of evidence regarding NO's impact on mitochondrial function and plant stress response.
Main Results:
- Plant mitochondria generate NO reductively via electron transport chain components acting on nitrite.
- NO production also occurs oxidatively, potentially linked to mitochondria.
- Mitochondrial NO inhibits respiration (cytochrome c oxidase), key enzymes (aconitase, succinate dehydrogenase), and leads to protein nitrosylation.
Conclusions:
- Mitochondrial NO plays a significant role in regulating plant respiration and metabolism.
- NO production by mitochondria influences the induction of alternative oxidase.
- Mitochondrial NO is implicated in plant adaptation to various abiotic and biotic stresses.
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