Plant defensins, a kind of low MW cationic peptides widely distributed in many plant seeds, have strong ability to inhibit pathogen. As multifunctional effetor molecules of non-specificity innate immunity, defensins are the key components in plant immunity system. Plant defensins are thought to interact with specific receptor harboring in the cell membrane and inhibit the growth of fungi, especially filamentous fungi. Plant defensins have conserva(?)e eight Cys residues and form four intramolecular cysteine...