Effect of ‘elicitors’ on extracellular peroxidase activity in suspension-cultured slash pine (Pinus elliottiiEngelm.)

✍ Scribed by Mark S. Lesney

• Book ID: 104619644
• Publisher: Springer
• Year: 1990
• Tongue: English
• Weight: 227 KB
• Volume: 20
• Category: Article
• ISSN: 0167-6857
• DOI: 10.1007/bf00041878

✦ Synopsis

Peroxidase activity in the growth medium of suspension-cultured slash pine was observed over time and eliciting chitosan concentrations from non-damaging to lethal were followed. First significant differences in peroxidase activity were observed within 12 h exposure to chitosan. Extracellular peroxidase activity decreased as chitosan increased until considerable cell death occurred and medium peroxidase activity increased. Chitin and fusiform rust mycelium elicited decreased peroxidase activity with no significant difference in viability. The highest levels of elicited lignification corresponded to the lowest extracellular peroxidase activity. Controls and the greatest chitosan concentration (which elicited 100% cell death) showed the highest peroxidase activity and no lignification.