High-throughput design of defined microbial consortia for crop protection

Synthetic microbial communities (SynComs) are changing the mechanism of crop protection that ensures global sustainability in agricultural system. This review covers design principles of top-down and bottom-up strategies, demonstrating how strain selection, high-throughput culturing and multiomics, metabolic modelling and adaptive evolution can be combined to produce ecologically balanced and functional microbial networks. It also describes practical delivery methods like seed coating, foliar sprays and encapsulated soil amendments that might translate the precision of the laboratory into real-world agriculture.

The applicability of this mechanism in crops such as garlic, pakchoi and cotton illustrates the potential of SynComs to improve uptake of nutrition, trigger plant defence and improve soil biota to suppress disease. In addition we highlight the leveraging of high-throughput genome editing, such as clustered regularly interspaced short palindromic repeats (CRISPR), artificial intelligence simulation and molecular screening, which are making community engineering and predictive control possible. At the same time, while they offer significant advantages, challenges exist. Achievement will depend on addressing problems of stability, biosafety and replicability in variable field conditions. Progress towards international coordination, particularly through institutions like the Food and Agriculture Organization and the Consultative Group on International Agriculture Research, will provide a basis for standards of safety and efficacy for microbial bioformulations.

Synthetic microbial communities are a step in the right direction towards a potentially more resilient form of agriculture, one that synthesizes microbiology and ecology in a unified attempt to restore balance, productivity and sustainability to farm systems.