The MYB-CC transcription factor MdγMYB2 modulates shoot elongation in spur-type apples.

MdγMYB2 is a positive regulator of shoot and internode elongation in apple, with overexpression increasing plant height and cell length in transgenic lines.

• Why it matters: Understanding the molecular basis of spur-type apple growth is crucial for high-density orchard production, yet it remains poorly understood. Identifying key regulators like MdγMYB2 can aid in breeding programs.
• What they did: Researchers analyzed phylogenetic, molecular, and functional aspects of MdγMYB2, including its expression patterns, localization, and effects on plant traits through transgenic overexpression and RNA interference, along with transcriptome profiling.
• The result: MdγMYB2 influences vegetative growth by modulating genes related to hormone signaling and cell wall metabolism, offering a genetic resource for developing compact apple cultivars and advancing knowledge of growth regulation.