Home⇛The Philippine Journal of Biochemistry and Molecular Biology (PJBMB)⇛vol. 2 no. 1 (1979)

Peroxidase Activity and Isozyme PAttern of Different Clones/Varieties of Sugatcane (Saccharum officinarum l.) with varying resistance to smut (caused by Ustilago scitaminea Sydow)

Pamela G. Fernandez | Azucena L. Carpena | Evelyn Mae T. Mendoza

 

Abstract:

The association of peroxidase activity and isozyme pattern with smut resistance in sugarcane was studied. Co 440 (immune), HQ 409 (intermediate resistant), two immune, and two highly susceptible progenies of the two varieties, one resistant control, CAC 57-13, and one susceptible control Phil 56-226, comprise the eight clones investigated. Peroxidase activity was found not to differ significantly among the clones. No significant correlation was observed between peroxidase activity of healthy tissue and healthy part of infected tissue and percent field infection. Infected tissues showed alteration in their isozyme pattern as compared to that of healthy tissues; there was evident increase in peroxidase activity in some isozymes and a decrease in others. However, among the various clones, the isozyme pattern did not show distinct features to differentiate immune/resistant from susceptible clones. The results indicate that peroxidase may not be involved in smut resistance of sugarcane and hence, may not be used as an index for such resistance.



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