A supprescin from a phytopathogenic fungus deactivates transcription of a plant defense gene encoding phenylalanine ammonia-lyase.

摘要: Abstract Both elicitor and supprescin (suppressor) are present in the pycnospore germination fluid of a pea pathogen Mycospharella pinodes . A nuclear run-on assay revealed that rapidly deactivated elicitor-triggered transcription gene encoding phenylalanine ammonia-lyase epicotyl tissues. The mechanism underlying deactivation plant defense by signal molecules secreted from fungal was investigated. Cis -acting sequences trans factors responsive to TATA-proximal region member family were examined vitro Gel mobility-shift assays DNase I footprinting analysis promoter PSPAL2 modified binding at multiple sites possibly involved supprescin-mediated deactivation. prominent changes observed boxes 2 4 near exonic sequences.