Mining and characterization of transcriptional regulatory modules for white lupin cluster root development

White lupin (Lupinus albus L.) develops bottlebrush-like root structures called cluster roots (CRs) under phosphorus deficiency to mobilize sparingly soluble phosphates in soil. The development of CRs is a highly coordinated process mediated largely by the expression of thousands of genes, in which transcription factors (TFs) play critical roles. However, key TFs governing CR development and their associated regulatory networks remain poorly understood. Here, we constructed a stage-ordered TF-ge