For example , silencing phenylalanine ammonia lyase ( PAL ) , an enzyme synthesizing precursors to SA , reduces SAR but enhances herbivory resistance against insects .
Wound and pathogen response appear to be interact negatively .
Silencing phenylalanine ammonia lyase ( PAL ) , an enzyme synthesizing precursors to SA , reduces SAR but enhances herbivory resistance against insects .
Wound and pathogen response appear to be interact negatively .