Why Do Plants Make Antimicrobial Proteins in Addition to a Combinatorial System of Antimicrobial Peptides?
Synthesis of large number of antimicrobial proteins in addition to antimicrobial peptides appears to be a unique feature of plant immunity. Recognition of specific molecular structures is a characteristic of proteins, as exemplified by enzymes, receptors, and antibodies. In animals, the adaptive immune system interacts with the innate immune system, and protein components of the adaptive immune system (antibodies) provide extensive target recognition capability to the entire immune system (Schnare et al., 2001; Zasloff, 2002). Also, because they have a circulation system for cells, animals can utilize clonal expansion of cells to provide an efficient gene-based nonself detection and elimination system. For plants to have survived without this feature, either their cell-autonomous innate immune systems must have some features that compensate for the lack of an adaptive immune response or the unlikely alternative that plants just do not require the capabilities of the animal immune syste
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- Why Do Plants Make Antimicrobial Proteins in Addition to a Combinatorial System of Antimicrobial Peptides?
