Department of Plant Biology, Michigan State University, East Lansing, USA; Plant Resilience Institute, Michigan State University, East Lansing, USA.
Department of Plant and Microbial Biology, University of California, Berkeley, USA.
Curr Opin Plant Biol. 2024 Aug;80:102544. doi: 10.1016/j.pbi.2024.102544. Epub 2024 May 16.
Underground storage organs occur in phylogenetically diverse plant taxa and arise from multiple tissue types including roots and stems. Thickening growth allows underground storage organs to accommodate carbohydrates and other nutrients and requires proliferation at various lateral meristems followed by cell expansion. The WOX-CLE module regulates thickening growth via the vascular cambium in several eudicot systems, but the molecular mechanisms of proliferation at other lateral meristems are not well understood. In potato, onion, and other systems, members of the phosphatidylethanolamine-binding protein (PEBP) gene family induce underground storage organ development in response to photoperiod cues. While molecular mechanisms of tuber development in potato are well understood, we lack detailed mechanistic knowledge for the extensive morphological and taxonomic diversity of underground storage organs in plants.
地下贮藏器官存在于系统发育上多样化的植物类群中，由包括根和茎在内的多种组织类型发育而来。加厚生长使地下贮藏器官能够容纳碳水化合物和其他营养物质，并需要在不同的侧生分生组织中增殖，然后进行细胞扩展。WOX-CLE 模块通过几个真双子叶植物系统中的维管束形成层调节加厚生长，但其他侧生分生组织中增殖的分子机制尚不清楚。在马铃薯、洋葱和其他系统中，磷酸乙醇胺结合蛋白（PEBP）基因家族的成员响应光周期信号诱导地下贮藏器官的发育。虽然马铃薯块茎发育的分子机制已被很好地理解，但我们缺乏对植物地下贮藏器官广泛的形态和系统发育多样性的详细机制知识。
