Retzer Katarzyna, Weckwerth Wolfram
Laboratory of Hormonal Regulations in Plants, Institute of Experimental Botany, Czech Academy of Sciences, Prague, Czechia.
Department of Functional and Evolutionary Ecology, Faculty of Life Sciences, Molecular Systems Biology (MoSys), University of Vienna, Wien, Austria.
Front Plant Sci. 2023 Mar 16;14:1154088. doi: 10.3389/fpls.2023.1154088. eCollection 2023.
Roots are sensors evolved to simultaneously respond to manifold signals, which allow the plant to survive. Root growth responses, including the modulation of directional root growth, were shown to be differently regulated when the root is exposed to a combination of exogenous stimuli compared to an individual stress trigger. Several studies pointed especially to the impact of the negative phototropic response of roots, which interferes with the adaptation of directional root growth upon additional gravitropic, halotropic or mechanical triggers. This review will provide a general overview of known cellular, molecular and signalling mechanisms involved in directional root growth regulation upon exogenous stimuli. Furthermore, we summarise recent experimental approaches to dissect which root growth responses are regulated upon which individual trigger. Finally, we provide a general overview of how to implement the knowledge gained to improve plant breeding.
根是进化而来的传感器，能同时对多种信号作出反应，使植物得以生存。与单一胁迫触发因素相比，当根暴露于外源刺激组合时，根的生长反应，包括定向根生长的调节，显示出受到不同的调控。几项研究特别指出了根的负向光性反应的影响，这种反应会干扰根在额外的重力、盐性或机械触发因素作用下的定向生长适应。本综述将概述已知的参与外源刺激下定向根生长调节的细胞、分子和信号传导机制。此外，我们总结了最近的实验方法，以剖析哪些根生长反应是由哪些单独的触发因素调节的。最后，我们概述了如何运用所获得的知识来改进植物育种。
