.M. alba explants were rinsed with tap water, dipped in 2% sodium hypochlorite (10 min), 70% for 30 seconds and washed with sterilized distill water several times. Surfaces of explants were removed by cutting under sterile conditions. Small piece of surface sterilized explants were plated on potato dextrose (PDB) and Lysogeny broth (LB). Difference characteristic microorganism were picked and subcultured at least 3 times to obtained single strain. Isolated microorganisms were transferred onto liquid potato dextrose (PDB) or Lysogeny broth (LB). Seven days old microbial were harvested, and then centrifuged at 10,000 rpm. Supernatant were removed and replaced with distilled water. Microbial suspension solutions were autoclaved and centrifuged at 10,000 rpm. Sterilized supernatants were collected and stored at 4°C until used as elicitors.
Selected concentration of methyl jasmonate (200 μM), yeast extract (2 mg/ ml), chitosan (10 mg/l) and