Abstract
Taphrin maculans BUTLER incites leaf spots disease in turmeric (Curcuma longa L.) plants. The pathogen forms two types of colonies namely, salmon-red and and creamy-white in the artificial medium when isolated from a single infection spot. Both strains resemble yeasts in morphology. The two strains were subjected to UV irradiation. The salmon-red one showed higher resistance to UV than the white one, presumably due to the presence of a red pigment in the former. When spores of the salmon-red strain were pre-treated with a new fluorochrome HOECHST 33258 the survival decreased. Decreased survival of the salmon-red strain was also observed during post-treatment which is probably due to the combined effect of UV and dye. The creamy-white strain differs from the salmon-red one in UV sensitivity, and also during combined treatment with UV and dye. During pre-treatment the organism shows more survival than during post-treatment with the fluorochrome. This differential response is discussed in the light of repair mechanisms involved in the organism.
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