The activity of succinate dehydrogenase (SDH) changed during maize (Zea mays L.) seed germination. On the fifth day of germination, the activity was the highest, which might be evidently explained by accelerated utilization of stored carbohydrates and lipids. Subsequent decrease in SDH activity might be related to metabolism switching to autotrophic nutrition. The correlation was found between the levels of sdh1-1 and sdh1-2 gene transcription and the extent of methylation of their promoters. During seed germination, promoter methylation of genes encoding the subunit A of SDH was activated, which resulted in suppression of their transcription. It is suggested that this mechanism may play an important role in the regulation of sdh1-1 and sdh1-2 gene transcription in plant tissues.
Russian Journal of Plant Physiology – Springer Journals
Published: Apr 15, 2012
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