State Key Laboratory of Tree Genetics and Breeding, Key Laboratory of Tree Breeding and Cultivation of the State Forestry Administration, Research Institute of Forestry, Chinese Academy of Forestry , Beijing, China.
State Key Laboratory of Tree Genetics and Breeding, Northeast Forestry University , Harbin, China.
Plant Signal Behav. 2021 Mar 4;16(3):1866312. doi: 10.1080/15592324.2020.1866312. Epub 2020 Dec 28.
WUSCHEL-related homeobox (WOX) transcription factors play essential roles in key developmental processes and in response to different abiotic stresses. In a recent study, we have refined a molecular regulation mechanism that drought-induced PagERF35 directly activates the expression of thus to promote root elongation and biomass, especially under drought conditions, and resulting in enhanced drought tolerance in poplar. In this study, we further found that overexpression significantly enhanced drought tolerance and improved survival rate. Interestingly, transgenic poplars overexpressing exhibited higher ability in scavenging reactive oxygen species (ROS) under drought stress. Combined with these and previous findings, we proposed the mechanism that could not only promote root elongation and biomass growth to increase drought tolerance but also improve plant drought tolerance by regulating ROS level through possibly modulating the expression of ROS scavenging related genes.
WUSCHEL 相关同源盒（WOX）转录因子在关键的发育过程中以及对各种非生物胁迫的响应中发挥着重要作用。在最近的一项研究中，我们完善了一个分子调控机制，即干旱诱导的 PagERF35 直接激活的表达，从而促进根系伸长和生物量的增加，特别是在干旱条件下，从而提高杨树的耐旱性。在这项研究中，我们进一步发现，过表达显著增强了耐旱性并提高了存活率。有趣的是，过表达的转基因杨树在干旱胁迫下表现出更高的清除活性氧（ROS）的能力。结合这些和以前的发现，我们提出了这样一种机制，即不仅可以通过促进根系伸长和生物量生长来提高耐旱性，还可以通过可能调节与 ROS 清除相关基因的表达来调节 ROS 水平来提高植物的耐旱性。
