Rooted Solutions: The Role of Plant Biology in Climate Change Mitigation

In the context of human history, climate change has traditionally transpired gradually over extended temporal scales, enabling plant species to adapt to fluctuations in climatic variables such as temperature, precipitation, and atmospheric composition. The consequential impact of climate variability on global agriculture, encompassing crop and livestock production as well as fisheries and aquaculture, has been profound. This shift in climate dynamics has manifested in notable adverse effects on crop plants, including reductions in crop yields across various regions and diminished seed protein content in cereal crops. Agricultural activities contribute significantly to Greenhouse Gas (GHG) emissions, particularly through the production and application of fertilizers, leading to the release of Nitrous Oxide—a GHG with a heat-trapping potency 298-fold greater than Carbon dioxide (CO2) (Hassan et al. 2022). The proactive management of CO2 levels, a pivotal factor in global warming, is essential for climate regulation. Recognizing the pivotal role of plants in the carbon cycle, particularly through photosynthesis and silicate weathering, offers avenues for intervention. Notably, the cultivation of cereal crops, constituting 75% of global food production, exhibits a unique capacity to extract nitrogen from the soil through metabolic interactions with Nitrogen-fixing bacteria. Simultaneously, legumes, exemplified by bean and pea plants, engage in a symbiotic relationship with rhizobia bacteria, forming root nodules that facilitate nitrogen acquisition in exchange for carbon, thereby minimizing greenhouse gas emissions and diminishing reliance on fossil energy. This approach holds promise for sustainable and climate-resilient agricultural practices on a global scale.