Abstract
AbstractTaphrina maculans BUTLER incites leaf spots disease in turmeric (Curcuma longa L.) plants. The pathogen forms two types of colonies namely, salmon‐red 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 dyeThe 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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