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The Production and Characterization of Ultraviolet-Induced Mutations in Aspergillus terreus. III. Biochemical Characteristics of the Mutations

Lewis B. Lockwood, Kenneth B. Raper, Andrew J. Moyer and Robert D. Coghill
American Journal of Botany
Vol. 32, No. 4 (Apr., 1945), pp. 214-217
Stable URL: http://www.jstor.org/stable/2437512
Page Count: 4
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The Production and Characterization of Ultraviolet-Induced Mutations in Aspergillus terreus. III. Biochemical Characteristics of the Mutations
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Abstract

Nine different types of biochemical and cultural response have been observed from 217 strains of Aspergillus terreus derived from irradiated conidia. Among the 76 strains which were morphologically unchanged were 59 that appeared to be unaltered biochemically, 13 that produced more itaconic acid than the parent strain, and 4 that produced no itaconic acid. Among the 141 strains which were obviously altered morphologically were 42 strains not apparently altered biochemically, 88 which produced little acid, and 11 which did not grow on the test medium. None of these 141 strains produced more itaconic acid than did the parent strain. Fifteen strains produced considerable nonacidic unsaturated material. Seventeen strains appeared to produce no acid other than itaconic. The distribution of strains, plotted in terms of total acid produced, itaconic acid produced, efficiency of conversion of glucose to itaconic acid, mycelial weights, and neutral nonreducing materials produced, is presented.

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