1887

Abstract

Three strains of a new diploid species of the genus van der Walt emend. van der Walt were isolated from exudates of Emory oak () trees in Arizona. In physiological characteristics and nuclear DNA base composition (38 mol% G+C) these isolates most closely resemble and , but the three taxa are genetically unrelated, as shown by DNA reassociation and ribosomal DNA restriction mapping. The morphology of these organisms is typical of the genus , except that the mature ascospores (four and occasionally more spores per ascus) are characteristically bacilliform rather than spheroidal, ellipsoidal, or reniform. Mitochondrial DNA (21 mol% G+C) is present in unusually large proportions (ca. one-half of the total DNA). The type strain of sp. nov. is strain UWO(PS) 85-349.2 (= ATCC 90019 = CBS 7720).

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1993-01-01
2023-02-04
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