Response of Crop Microbiomes to Biotic Stress

Crop microbiomes, comprising diverse assemblages of microorganisms associated with plants, exert significant influence on plant health, growth, and productivity. When confronted with biotic stress, arising from pests, pathogens, and weeds, the intricate interplay between crop microbiomes and the host plant assumes heightened importance. Comprehending the response of crop microbiomes to biotic stress and their potential for alleviating such stress represents an emerging research area. This investigation elucidates the existing knowledge regarding the response of crop microbiomes to biotic stress and delineates prospective avenues for research in this domain. Recent investigations have unveiled the dynamic responses of crop microbiomes to biotic stress, manifested as alterations in microbial community composition and functionality. These responses frequently entail shifts in the abundance of beneficial microorganisms, including plant growth-promoting rhizobacteria and mycorrhizal fungi, as well as modifications in the diversity and activity of pathogenic or parasitic organisms. Such perturbations within the crop microbiome can impact plant defense mechanisms, nutrient acquisition, hormone regulation, and overall plant fitness. Furthermore, crop microbiomes have been ascertained to influence plant resistance to biotic stress through diverse mechanisms. Beneficial microorganisms can directly impede the proliferation of pathogens or pests through the synthesis of antimicrobial compounds or by eliciting systemic resistance in plants. Moreover, the presence of a diverse and stable microbiome can enhance plant resilience by priming the immune system and fostering the production of defense-related metabolites. Looking forward, future investigations in this field should prioritize the elucidation of precise mechanisms underpinning the responses of crop microbiomes to biotic stress. Advanced techniques such as metagenomics, metatranscriptomics, and metabolomics should be harnessed to unravel the intricate interactions transpiring within the microbiome and between the microbiome and the host plant. Furthermore, studying the temporal dynamics of microbiome–plant interactions under diverse stress conditions will furnish invaluable insights into the stability and resilience of crop microbiomes.