Auxin is a key hormonal regulator, that governs plant growth and development in concert with other hormonal pathways. The unique feature of auxin is its polar, cell-to-cell transport that leads to the formation of local auxin maxima and gradients, which coordinate initiation and patterning of plant organs. The molecular machinery mediating polar auxin transport is one of the important points of interaction with other hormones. Multiple hormonal pathways converge at the regulation of auxin transport and form a regulatory network that integrates various developmental and environmental inputs to steer plant development. In this review, we discuss recent advances in understanding the mechanisms that underlie regulation of polar auxin transport by multiple hormonal pathways. Specifically, we focus on the post-translational mechanisms that contribute to fine-tuning of the abundance and polarity of auxin transporters at the plasma membrane and thereby enable rapid modification of the auxin flow to coordinate plant growth and development.

生长素是一种关键的激素调节剂，与其他激素途径一起控制植物的生长和发育。生长素的独特特征是其极性、细胞间运输，导致局部生长素最大值和梯度的形成，从而协调植物器官的启动和模式化。介导极性生长素运输的分子机制是与其他激素相互作用的重要点之一。多种激素途径汇聚在生长素运输的调节中，并形成一个调节网络，整合各种发育和环境输入以引导植物发育。在这篇综述中，我们讨论了在理解多种激素途径调节极性生长素运输的机制方面的最新进展。具体来说，我们关注有助于微调质膜上生长素转运蛋白的丰度和极性的翻译后机制，从而能够快速修改生长素流以协调植物生长和发育。