Abstract
Quantitative comparative study was made of the peroxide metabolism enzymes (PME, namely superoxide dismutase, peroxidase and catalase), protein and ascorbic acid contents of homogenates of the roots, stem and leaves of 6 well-defined tomato varieties differing in sensitivity to TMV, 15, 30 and 50 days after TMV infection and in non-infected plants of the same age. It emerges from our examinations that, just like the other components studied, the peroxide metabolism enzymes undergo a considerable change during TMV infection. In the parts of the tomato varieties investigyted, the analyses appear to be suitable for rapid demonstration of the virus infektion and for early diagnosis of that.
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