Tree Peony Gene Discovery Holds Key to Boosting Oil Production

Researchers have discovered a molecular switch in tree peony seeds that controls oil production. The transcription factor PrIDD7 acts as a brake on seed oil accumulation and its activity is associated with reduced oil levels. When artificially activated, PrIDD7 suppressed oil production in experimental plants. Conversely, when the gene was silenced in tree peony seeds, oil accumulation increased.

The discovery highlights the complex regulation of seed lipid metabolism and suggests that manipulating similar genetic switches could improve oilseed crops used for food, industrial materials, and biofuels. The PrIDD7 protein belongs to the INDETERMINATE DOMAIN family of plant transcription factors and regulates fatty acid biosynthesis by repressing genes involved in this process.

The researchers' findings add a new layer to the regulatory landscape controlling seed oil production and emphasize the importance of understanding how genetic switches interact. The discovery has potential implications for improving desirable fatty acids without simply increasing total oil, but any agricultural application remains several steps away due to the complexity of plant development and growth.