The maize root system comprises structurally and functionally different root types. Mutant analyses have revealed that root-type-specific genetic regulators intrinsically determine the maize root system architecture. Molecular cloning of these genes has demonstrated that key elements of auxin signal transduction, such as LOB domain (LBD) and Aux/IAA proteins, are instrumental for seminal, shoot-borne, and lateral root initiation. Moreover, genetic analyses have demonstrated that genes related to exocytotic vesicle docking, cell wall loosening, and cellulose synthesis and organization control root hair elongation. The identification of upstream regulators, protein interaction partners, and downstream targets of these genes together with cell-type-specific transcriptome analyses have provided novel insights into the regulatory networks controlling root development and architecture in maize.

玉米根系包括结构和功能上不同的根系类型。突变分析显示，根系类型特异性遗传调节剂从本质上决定了玉米的根系结构。这些基因的分子克隆表明，生长素信号转导的关键元件，如LOB结构域（LBD）和Aux / IAA蛋白，对于精子，芽生和侧根的启动起了重要作用。此外，遗传分析表明，与胞吐小泡对接，细胞壁松弛以及纤维素合成和组织有关的基因控制着根毛的伸长。鉴定上游调节剂，蛋白质相互作用伙伴，