北林大团队揭示杨树次生维管系统发育遗传调控机制

Core Insights - The research conducted by Professor Zhang Deqiang's team at Beijing Forestry University reveals the genetic basis of the evolutionary characteristics of the secondary vascular system in poplar trees, filling a gap in the understanding of the genetic mechanisms of perennial woody plants [1][3][5] Group 1: Research Findings - The study utilized phylogenetic, genomic, and transcriptomic analyses to investigate the secondary vascular system of poplar, identifying the oldest ancestral lineage (Phylostratum 1, PS1) as the primary genetic source of the poplar genome [3][5] - Over 61.55% of the expressed genes in the secondary vascular system of poplar can be traced back to PS1, indicating a significant role of these ancient genes in shaping the evolutionary genetic foundation of poplar [5][7] - The research identified a transcriptional regulatory network involving PtoWRKY53, which negatively regulates the development of wood tissue by inhibiting the transcription of PtoCESA3, thereby reducing the deposition of secondary cell walls in fiber cells [7][9] Group 2: Scientific Significance - The study provides critical theoretical guidance for the breeding of breakthrough woody plant varieties, emphasizing the importance of understanding the evolutionary pathways and molecular regulatory mechanisms of the secondary vascular system [1][3] - The findings contribute to a deeper understanding of the evolutionary development of secondary vascular systems in perennial trees, establishing a foundational framework for future research in this area [7][9]