Plants have evolved robust adaptive mechanisms to withstand the ever-changing environment. Tightly regulated distribution of the hormone auxin throughout the plant body controls an impressive variety of developmental processes that tailor plant growth and morphology to environmental conditions. The proper flow and directionality of auxin between cells is mainly governed by asymmetrically localized efflux carriers – PINs – ensuring proper coordination of developmental processes in plants. Discerning the molecular players and cellular dynamics involved in the establishment and maintenance of PINs in specific membrane domains, as well as their ability to readjust in response to abiotic stressors is essential for understanding how plants balance adaptability and stability. While much is known about how PINs get polarized, there is still limited knowledge about how abiotic stresses alter PIN polarity by acting on these systems. In this review, we focus on the current understanding of mechanisms involved in (re)establishing and maintaining PIN polarity under abiotic stresses.

植物已经进化出强大的适应机制来承受不断变化的环境。生长素激素在整个植物体内的严格调节分布控制着令人印象深刻的各种发育过程，使植物生长和形态适应环境条件。细胞间生长素的正确流动和方向性主要由不对称局部外排载体（PIN）控制，确保植物发育过程的适当协调。识别特定膜域中 PIN 的建立和维持所涉及的分子参与者和细胞动力学，以及它们响应非生物应激源进行重新调整的能力，对于理解植物如何平衡适应性和稳定性至关重要。尽管人们对 PIN 如何极化了解甚多，但对于非生物胁迫如何通过作用于这些系统来改变 PIN 极性的了解仍然有限。在这篇综述中，我们重点关注当前对非生物胁迫下（重新）建立和维持 PIN 极性的机制的理解。