Transcriptome analysis reveals plant hormone signal transduction mechanisms underlying freezing stress responses in Cycas panzhihuaensis

This study revealed that C. panzhihuaensis adapted to freezing stress through dynamic hormonal regulation and transcriptional reprogramming. Key phytohormones (cis-OPDA, GA4, SA, ABA, ACC, CS, and CTK) exhibited stage-specific accumulation patterns, and the plant hormone signal transduction pathway may be involved in regulating the cold resistance mechanism in C. panzhihuaensis. These findings provide crucial insights into cold resistance mechanisms of C. panzhihuaensis and establish a preliminary theoretical foundation for introducing this species to higher latitudes.