Abstract
Chitinase activity in Allium cepa (onion) tissue cultures was investigated using a radioactive assay and polyacrylamide gel electrophoresis (PAGE). Increased chitinase activity was detected in callus cultured on agar-solidified media for 72 h with 1 mM salicylic acid or 0.05 M ethrel, and in callus cultured in liquid suspension for 72 h with 0.1 mM salicylic acid or 0.1 M ethrel. Non-denaturing PAGE analysis of callus suspension cultures treated with salicylic acid revealed a new chitinase activity which accumulated in the fluid of the suspension cultures.
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