A STUDY ON ACTIVITIES OF POLYPHENOL OXIDASE AND PEROXIDASE, AND TENDENCY IN CHANGES OF ISOZYME SPECTRA IN CHINESE WHITE POPLAR (POPULUS TOMENTOSA CARR.)LEAVES AFTER INFECTED WITH MELOMPSORA MAGNUSIANA WAGNER
In leaves of Populus tomentosa Carr. infected by Melampsora magnu-siana Wagner activities of the peroxidase and polypkenoloxidase Were increased obviously in initial stage. The activities of enzymes were determined by polyacrylamide gel elcctrophoreses and spectrophotometry . It does achieve the top of curve at the time about the uredia occur, and then decline. Also, the isozyme patterns of peroxidase and polypheuol-oxidase in infected leaves differ markedly from those in healthy leaves used as control.The ...