Dr Wiskich is distinguished for his contributions to the understanding of the organisation and regulation of plant mitochondrial function. He established criteria for the isolation of tightly-coupled intact plant mitochondria which are used to the present day. In subsequent studies he (i) discovered a novel oxaloacetate carrier which is critical for the operation of mitochondrial hydrogen shuttles, (ii) showed that factors other than adenylate energy charge are more important in controlling plant mitochondrial respiration and (iii) demonstrated enzyme domains within the mitochondrial matrix which have differential access to NAD and the respiratory chains. His collaborative research has produced the first detailed kinetic analysis linking reduced ubiquinone levels to the relative rates of oxidation through cytochrome oxidase and the alternative oxidase; it also provided a statistical model of mitochondrial energy supply.