Antimicrobial synthetic cationic lipopetides and plant induced resistance


Abstract: A new family of synthetic membrane active ultrashort synthetic lipopeptidescomposed of only four amino acids linked to fatty acids was tested for their ability to inducesystemic resistance and defense responses in plants. We found that two peptides (C16-KKKK andC16-KLLK) can induce expression of defense related genes in cucumber leaves when appliedthrough the roots. Moreover these compounds can afford systemic protection against thephytopathogenic bacterium Pseudomonas syringae pv lachrimans (Psl). Thus, short cationiclipopeptides are a new low cost category of compounds of potentially high utility in the inductionof systemic resistance in plants.

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