Sensors for the quantification, localization and analysis of the dynamics of plant hormones

Summary Plant hormones play important roles in plant growth and development and physiology, and in acclimation to environmental changes. The hormone signaling networks are highly complex and interconnected. It is thus important to not only know where the hormones are produced, how they are transported and how and where they are perceived, but also to monitor their distribution quantitatively, ideally in a non‐invasive manner. Here we summarize the diverse set of tools available for quantifying and visualizing hormone distribution and dynamics. We provide an overview over the tools that are currently available, including transcriptional reporters, degradation sensors, and luciferase and fluorescent sensors, and compare the tools and their suitability for different purposes.
Significance Statement Sensors are a valuable tool for understanding how the spatial and temporal distribution of plant hormones is coordinated, and how these changes trigger diverse responses. This review summarizes the diverse tools available to quantify and visualize the distribution and dynamics of hormones, provides an overview of the tools currently available, including transcription reporters, degradation sensors, and luciferase and fluorescent sensors, and compares the tools and their suitability for different purposes.