Harnessing synthetic microbial communities for sustainable agriculture: Enhancing soil health and crop yields
Yunhe Cui, Yue Tao, Yang Luo, Rui Sun, Siyue Han, Yang Yang, Zhongmin Dai, Ying Zhang
Abstract
Synthetic microbial communities (SynComs) are emerging as a crucial strategy to address pressing global challenges such as rapid population growth and declining land quality. Designed to emulate natural microbial structures and functions, these communities offer significant advantages in enhancing crop yields and improving soil health. SynComs entail the concurrent cultivation of diverse functional microbial populations under controlled conditions. By introducing specific rhizosphere microbes, SynComs enhance nutrient uptake, regulate hormone levels, promote root development, and bolster plant resilience to stresses, such as drought and salinization. Additionally, SynComs suppress pathogens through antibiotic production and activation of plant immune responses, reducing reliance on chemical pesticides and promoting stability and productivity in agricultural ecosystems. SynCom construction employs two primary approaches: top-down functional screening and bottom-up microbial isolation and cultivation. The top-down strategy leverages high-throughput sequencing to identify and select microbes with specific functions, prioritizing ecological fidelity and functional replicability. Conversely, the bottom-up approach starts with isolating microbial cultures from natural habitats, followed by advanced biotechnological techniques to screen and cultivate communities that impart desired functionalities to host plants. Despite their potential, SynComs face challenges in strain selection, functional validation, and maintaining stability under field conditions. Future research should refine construction methodologies, improve robustness in field applications, and evaluate long-term ecological impacts. Integrating modern biotechnology with ecological principles, SynComs offer promise in advancing sustainable agricultural practices.