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The primary function of mitochondria is respiration, where the catabolism of substrates is coupled to ATP synthesis via oxidative phosphorylation. In plants, mitochondrial composition is relatively complex and flexible and has specific pathways to support photosynthetic processes in illuminated leaves. Plant mitochondria also play important roles in a variety of cellular processes associated with carbon, nitrogen, phosphorus, and sulfur metabolism. Research on plant mitochondria has rapidly developed in the last few decades with the availability of the genome sequences for a wide range of model and crop plants. Recent prominent themes in plant mitochondrial research include linking mitochondrial composition to environmental stress responses, and how this oxidative stress impacts on the plant mitochondrial function. Similarly, interest in the signaling capacity of mitochondria, the role of reactive oxygen species, and retrograde and anterograde signaling has revealed the transcriptional changes of stress responsive genes as a framework to define specific signals emanating to and from the mitochondrion. There has also been considerable interest in the unique RNA metabolic processes in plant mitochondria, including RNA transcription, RNA editing, the splicing of group I and group II introns, and RNA degradation and translation. Despite their identification more than 100 years ago, plant mitochondria remain a significant area of research in the plant sciences. This Special Issue, “Plant Mitochondria”, will cover a selection of recent research topics and timely review articles in the field of plant mitochondrial research.

signaling --- plant mitochondria --- electron transfer chain --- ATP synthesis --- respiration --- oxidative stress --- RNA metabolism

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Oxidation-reduction reaction --- Tables --- Oxidation-Reduction. --- -Electron transfer reaction --- Oxido-reduction --- Redox reaction --- Chemical reactions --- Tables. --- -Tables --- Oxidation-Reduction --- Redox --- Oxidation Reduction --- Electron transfer reaction --- Inorganic compounds --- Oxydoréduction --- Composés inorganiques --- Oxydoréduction --- Composés inorganiques

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Acid-base. --- Bridging groups. --- Chemical reactions --- Chemistry, Inorganic --- Electron-transfer. --- Insertion reactions. --- Ion-association. --- Kinetics. --- Photolysis. --- Substitution reactions. --- Congresses. --- Congresses.

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Begins with a historial overview by Henry Taube. Overviews the advances pioneered by Taube, including mechanisms of electron transfer reactions, charge transfer complexes, and p back bonding effects in metal-ligand interactions. Discusses applications of principles of electron transfer to diverse areas of chemistry and biology such as the selective and controlled oxidation of organic functional groups, polymerization catalysis, metal biological interactions with DNA, biological electron transfer reactions, and new imaging agents in diagnostic medicine.

Oxidation-reduction reaction --- Chemistry --- Physical Sciences & Mathematics --- Chemistry - General --- Congresses --- Taube, Henry, --- Congresses. --- ELECTRON TRANSFER --- ORGANOMETALLIC COMPOUNDS --- TRANSITION METALS --- REACTIONS --- BIOLOGICAL STUDIES

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These new volumes of Methods in Enzymology (554 and 555) on Hydrogen Sulfide Signaling continue the legacy established by previous volumes on another gasotransmitter, nitric oxide (Methods in Enzymology volumes 359, 396, 440, and 441), with quality chapters authored by leaders in the field of hydrogen sulfide research. These volumes of Methods in Enzymology were designed as a compendium for hydrogen sulfide detection methods, the pharmacological activity of hydrogen sulfide donors, the redox biochemistry of hydrogen sulfide and its metabolism in mammalian tissues, the mechanisms inherent in hy

Chemistry --- Biology --- Physical Sciences & Mathematics --- Health & Biological Sciences --- Inorganic Chemistry --- Cytology --- Hydrogen sulfide. --- Oxidation-reduction reaction. --- Electron transfer reaction --- Oxido-reduction --- Redox reaction --- Hydrogen sulphide --- Hydrosulfuric acid --- Sulfhydric acid --- Sulfur hydride --- Chemical reactions --- Sulfides