Related Experiment Video
Updated: May 5, 2026
08:21
Real-time In Vivo Recording of Arabidopsis Calcium Signals During Insect Feeding Using a Fluorescent Biosensor
Published on: August 15, 2017
13.1K
A biosensor for the direct visualization of auxin.
Ole Herud-Sikimić1, Andre C Stiel1,2, Martina Kolb1
1Max Planck Institute for Developmental Biology, Tübingen, Germany.
Nature
|April 8, 2021
Summary
Scientists developed a novel biosensor to visualize auxin distribution in plants at the cellular level. This tool allows real-time tracking of auxin movement, crucial for understanding plant growth and development.
Area of Science:
- Plant Biology
- Molecular Biology
- Biochemistry
Background:
- Indole-3-acetic acid (auxin) is a key plant hormone regulating growth and development.
- Previous methods could not visualize auxin dynamics at cellular resolution, limiting understanding of transient changes.
Purpose of the Study:
- To develop a genetically encoded biosensor for quantitative, in vivo visualization of auxin distribution.
- To enable real-time monitoring of auxin at subcellular resolution in plants.
Main Methods:
- Engineered Escherichia coli tryptophan repressor for auxin specificity.
- Coupled auxin-binding moiety with fluorescent proteins for FRET-based readout.
- Utilized the biosensor in planta to monitor auxin dynamics.
Main Results:
- Demonstrated direct monitoring of rapid auxin uptake and clearance in individual plant cells.
- Visualized auxin redistribution in response to gravity and transport inhibitors.
- Achieved real-time, subcellular resolution of auxin concentrations and dynamics.
Conclusions:
- The developed biosensor provides unprecedented insights into auxin spatial and temporal dynamics.
- Enables detailed study of auxin's role in plant development and environmental responses.
- Opens new avenues for investigating hormone signaling in plants.
