 Plant antimicrobial peptides, amps, have unique properties due to their rich cysteine residues that form disulfide bonds, providing them with high chemical, thermal, and proteolytic stability. These cysteine-rich peptides are classified into families based on sequence similarity, cysteine motifs, and tertiary structure fold. Plant amp families include thionins, defensins, hevian-like peptides, not-in-type peptides, lipid transfer proteins, alpha-herbinin, and snakens. These properties make plant amp's potential therapeutics and protect crops through transgenic methods. This article was authored by James P. Tam, Xu Jing-Wang, Kai-Huang, and others.