Optogenetics: Controlling plant processes with light

Optogenetics in plants. PULSE enables targeted and reversible gene expression control in plants in the presence of ambient light. Leonie-Alexa Koch Institute of Synthetic Biology, University of Düsseldorf

A research team of biologists within the CEPLAS Cluster of Excellence at Heinrich Heine University Düsseldorf (HHU) has succeeded, together with colleagues from the University of Freiburg, to develop an optogenetic tool for use in plant research. As the researchers now report in NATURE METHODS, the tool can be used to control plant processes precisely using light.

Optogenetics offers a very powerful research toolset for biology. It can be used to control cellular events using light-responsive switches by activating specific sections of the genome in a targeted manner. For example, signalling and metabolic processes can be controlled through targeted activation using light.

Many optogenetic publications are focused on cells in mammalian, yeast and bacterial systems. Research from the area of plants is much less common. One of the reasons for this is a lack of suitable optical switches that can be used and switched in a targeted manner in plant cells, as the plants themselves require light to grow and the switches would therefore be constantly active.

A team working with HHU-CEPLAS-researchers Prof. Dr. Matias Zurbriggen (Institute of Synthetic Biology) and Prof. Dr. Rüdiger Simon (Institute of Developmental Genetics) has now succeeded, in cooperation with colleagues from the University of Freiburg-CIBSS and the University of East Anglia-Norwich, to develop a customised optogenetic switch for plants.

This tool, named ‘PULSE’ (Plant Usable Light-Switch Elements), is suitable for plants growing under normal day/night cycles. Targeted illumination with red light activates gene expression, while ambient white light is used to reverse the process.

To do this, PULSE has two optogenetic switches that respond to two different wavelengths. The monochromatic red light activates the switch, allowing a certain gene to be expressed at that precise moment. Blue light from daylight resets the switch, thus stopping gene expression.

This process can be repeated any number of times. Prof. Zurbriggen explained the significance of the development: “PULSE introduces the superior advantages of optogenetics into plants.

The system is fully reversible, and achieves high dynamic ranges of expression and temporal resolution. The control of cellular processes with high spatiotemporal resolution is key to quantitatively understand the dynamics of biological signalling networks and for developing biotechnological applications.”

The researchers in Düsseldorf first applied PULSE in one of biology’s model plants, thale cress (Arabidopsis thaliana). It was then possible to combine this tool with CRISPR/Cas9-based technologies. Finally, they were able to use tobacco plants (Nicotiana benthamiana) and thale cress to manipulate physiological responses in plants, for example their immune response.

Prof. Simon commented: “The optogenetic tool makes it possible to programme the expression of desired properties in a plant. We therefore think that PULSE and the conceivable expanded optogenetic toolset will facilitate in the future the targeted manipulation and study of biological processes in plants including development, growth, hormone signalling and stress responses.”

The work was carried out within the Cluster of Excellence on Plant Sciences (CEPLAS) research programme. The HHU team worked with researchers from the CIBSS – Centre for Integrative Biological Signalling Studies, Cluster of Excellence at the University of Freiburg led by Prof. Dr. Thomas Ott, Prof. Dr. Wilfried Weber and Prof. Dr. Jens Timmer and Ben Miller of the University of East Angli

Arne Claussen

Rocio Ochoa-Fernandez, Nikolaj B. Abel, Franz-Georg Wieland, Jenia Schlegel, Leonie A. Koch, J. Benjamin Miller, Raphael Engesser, Giovanni Giuriani, Simon M. Brandl, Jens Timmer, Wilfried Weber, Thomas Ott, Rüdiger Simon, Matias D. Zurbriggen, Optogenetic control of gene expression in plants in the presence of ambient white light, Nature Methods (accepted 18 May 2020, published online 29 June 2020)

Online publication: https://www.nature.com/articles/s41592-020-0868-y

DOI: 10.1038/s41592-020-0868-y

Media Contact

Arne Claussen idw - Informationsdienst Wissenschaft

Further information:

http://www.hhu.de/

All news from this category: Life Sciences and Chemistry

Articles and reports from the Life Sciences and chemistry area deal with applied and basic research into modern biology, chemistry and human medicine.

Valuable information can be found on a range of life sciences fields including bacteriology, biochemistry, bionics, bioinformatics, biophysics, biotechnology, genetics, geobotany, human biology, marine biology, microbiology, molecular biology, cellular biology, zoology, bioinorganic chemistry, microchemistry and environmental chemistry.

Back to the Homepage

Comments (0)

Write comment

Latest posts

Just a few atoms thick: New functional materials developed

Using the smallest “construction set” in the world, a research team from the universities of Marburg, Giessen and Paderborn is designing new materials for computer chips, light-emitting diodes and solar…

Researchers develop new metal-free, recyclable polypeptide battery

– that degrades on demand … This could result in battery production moving away from strategic elements like cobalt. The introduction of lithium-ion (Li-ion) batteries has revolutionized technology as a…

Artificial lungs as organ replacement

DFG priority program funds four MHH projects with 1.6 million euros. For people with severe lung diseases, transplantation of a healthy organ is often the only chance of survival. But…

Partners & Sponsors