Gerber Megan E, White Maleana G, Muday Gloria K
Department of Biology, Wake Forest University, Winston-Salem, NC, 27109, USA.
Center for Molecular Signaling, Wake Forest University, Winston-Salem, NC, 27109, USA.
New Phytol. 2025 Sep;247(5):2042-2048. doi: 10.1111/nph.70306. Epub 2025 Jun 25.
Root hairs (RHs) increase the surface area of roots, facilitating nutrient and water uptake and plant anchorage. RHs form from root epidermal cells and elongate by polar tip growth. Reactive oxygen species (ROS) have recently been implicated as important signals that drive RH formation and elongation using both genetic and imaging approaches. Localized changes in ROS levels in the RH tip are facilitated by hormone-mediated changes in the synthesis and activity of respiratory burst oxidase homologs and class III peroxidases. These findings broaden our understanding of the mechanisms controlling polar tip growth in plants that drive RH formation, which can inform the breeding and engineering of plants that thrive under drought and nutrient stress.
根毛增加了根的表面积，促进了养分和水分的吸收以及植物的固着。根毛由根表皮细胞形成，并通过极性顶端生长而伸长。最近，活性氧（ROS）被认为是利用遗传和成像方法驱动根毛形成和伸长的重要信号。激素介导的呼吸爆发氧化酶同源物和III类过氧化物酶的合成和活性变化促进了根毛尖ROS水平的局部变化。这些发现拓宽了我们对控制植物极性顶端生长以驱动根毛形成机制的理解，这可为在干旱和养分胁迫下茁壮成长的植物的育种和工程提供参考。
