Role of differential expression of <Emphasis Type="Italic">sdh1-1</Emphasis> and <Emphasis Type="Italic">sdh1-2</Emphasis> genes in alteration of isoenzyme composition of succinate dehydrogenase in germinating maize seeds

A probable mechanism of alteration of the isoenzyme composition of succinate dehydrogenase (SDH) due to differential expression of genes encoding subunit A was considered. The alteration of SDH activity during maize seed germination was investigated, and its maximal activity on day 4-5 of germination was found. The alteration of the sdh1-1 and sdh1-2 gene expression level during maize seed germination was evaluated using the quantitative polymerase chain reaction method. The presence of four forms of the studied enzymes, providing multiple SDH functions was found in maize inflorescence using electrophoresis in polyacrylamide gel.