Similarly , overexpression of PAL enhances SAR but reduces wound response after insect herbivory .
For example , silencing phenylalanine ammonia lyase ( PAL ) , an enzyme synthesizing precursors to SA , reduces SAR but enhances herbivory resistance against insects .
Overexpression of PAL enhances SAR but reduces wound response after insect herbivory .
For example , silencing phenylalanine ammonia lyase ( PAL ) , an enzyme synthesizing precursors to SA , reduces SAR but enhances herbivory resistance against insects .