In a groundbreaking study, researchers from the Chinese Academy of Agricultural Sciences have unveiled how plants summon beneficial microbes to defend against diseases through a “cry for help” mechanism. Published in the prestigious journal Nature Communications, this discovery sheds light on the intricate communication between plants and soil microorganisms, offering promising avenues for sustainable agriculture.
The team simulated pathogen attacks by introducing modified nonpathogenic bacteria to plants. These “mild” bacteria triggered the plants’ defense responses, leading them to assemble protective microbiomes in the rhizosphere—the narrow region of soil influenced by root secretions. Remarkably, this defensive effect persisted across multiple planting cycles, suggesting long-lasting benefits for crop health.
Central to this defense strategy is a microorganism called Devosia. When plants emit a “cry for help” signal, Devosia responds rapidly, multiplying in the rhizosphere to ward off pathogens. The researchers discovered that a polypeptide component produced by Devosia further enhances this protective interaction, strengthening the alliance between plants and beneficial microbes.
“Our findings reveal a sophisticated mechanism by which plants actively recruit microbial allies to combat diseases,” said the lead researcher. “This could revolutionize our approach to crop protection and sustainability in agriculture.”
This study not only deepens our understanding of plant-microbe interactions but also holds significant potential for developing eco-friendly strategies to enhance crop resilience. By harnessing these natural defense mechanisms, farmers could reduce reliance on chemical pesticides, leading to healthier ecosystems and more sustainable food production.
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Researchers unravel plants' 'cry for help' in fighting disease
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