Climate Change and Its Impact on Agriculture
The surface temperature of our planet is rising rapidly. Many of the warmest years recorded happened in the last 20 years. The increase in earth’s surface temperature has caused a surge of extreme weather events including heavy rainfall, prolonged periods of floods or droughts, heat waves, hurricanes, and storms which can have huge impacts on life on earth. One sector where negative effects can be observed is agriculture. As plants are struggling to adapt to the new climate, crop yields are going down leading to a loss of income and food. To help plants adapt, scientists and farmers are trying to breed plants that are better at dealing with harsher conditions. However, further solutions to deal with the effects of climate change on agriculture are being sought as well.
The Role of the Plant Rhizosphere in Crop Resilience
Plants are constantly interacting with their environment. One zone of diligent interaction is the plant rhizosphere which describes the soil in close vicinity to plant roots. The biology and chemistry of this soil is strongly affected by the plant roots. Simultaneously, bacteria and other microorganisms living in the plant rhizosphere can have huge effects on plant health, growth, and yield. The TOLERATE project has been designed to exploit the connection between plant rhizosphere and plant health. Instead of breeding plants to cope with the challenges of climate change, we want to investigate how changing the bacterial composition of the plant rhizosphere influences plant growth and health, for example by introducing plant-growth promoting bacteria.
Unlocking the Potential of Plant Growth-Promoting Bacteria
Plant-growth promoting bacteria possess properties capable of enhancing plant growth. These beneficial microbes contribute to plant health in several ways, such as:
- Providing essential nutrients to plants
- Degrading harmful contaminants in the soil
- Solubilizing (in)organic compounds
- Producing bioactive compounds that promote plant growth
Therefore, the TOLERATE project aims to identify bacteria that can produce plant growth-promoting compounds, solubilize specific (in)organic compounds, and exhibit key enzymatic activities. Additionally, the project seeks bacteria with increased tolerance to stressors such as high salt concentrations and solvent exposure—conditions commonly associated with climate change.
A novel approach in this project is the examination of ancient soil samples that represent past, more climate-tolerant conditions. By studying these historical microbial communities, TOLERATE aims to discover bacteria with enhanced resilience and growth-promoting capabilities.
Scaling Up Sustainable Solutions for Agriculture
The ultimate goal of the TOLERATE project is to identify and engineer beneficial bacteria that support plant growth under changing climatic conditions. Once these promising bacterial strains have been identified, the project will explore ways to produce them and their bioactive compounds on a larger scale, making them accessible for agricultural use.
A Future of Sustainable and Climate-Resilient Agriculture
By leveraging microbial solutions, the TOLERATE project offers an innovative and sustainable approach to tackling climate-related challenges in agriculture. This research has the potential to revolutionize farming by reducing dependence on chemical fertilizers and improving crop resilience in extreme environments. In the long term, these advancements will not only benefit farmers and food security but also contribute to global efforts in mitigating climate change through more sustainable agricultural practices.
Content contribution: HWU – Heriot-Watt University