Features of Systemic Acquired Resistance (SAR)

• Triggered by Viral, Fungal or Bacterial Agents
• Results in Systemic Changes in Physiology and Gene Expression
• Requires Salicylic Acid Accumulation
• Resistance is Effective Against Diverse Pathogens
• Response Lasts Weeks to Months
• Depends upon activity of the NIM1/NPR1 gene product
• NIM1/NPR1 interacts in yeast two-hybrid system with bZIP family transcription factors, which may play a role in regulating SAR