Citral‐amino‐oligosaccharide Schiff base induces plant systemic acquired resistance against tobacco mosaic virus

This study is the first to report on the significant anti-TMV activity of CAOS. Its antiviral mechanism involves inducing the overexpression of disease resistance-related genes, triggering a ROS burst, activating the regulation of related defense enzymes, and consequently activating the plant's Systemic Acquired Resistance (SAR), thereby enhancing the plant's disease resistance capability. CAOS is easily prepared, highly active, has a long duration of effect, and is broad-spectrum, demonstrating potential for development as a novel plant immune activator. © 2026 Society of Chemical Industry.