Extensive studies using the model system Arabidopsis thaliana to elucidate plant defense signaling and pathway networks indicate that salicylic acid (SA) is the key hormone triggering the plant defense response against biotrophic and hemi-biotrophic pathogens, while jasmonic acid (JA) and derivatives are critical to the defense response against necrotrophic pathogens. | Arabidopsis genes AtNPR1 AtTGA2 and AtPR-5 confer partial resistance to soybean cyst nematode Heterodera glycines when overexpressed in transgenic soybean roots
