Abstract
To understand the molecular basis of pathogenic specialization in Alternaria alternata pathogens, our efforts have focused on cloning the genes required for biosynthesis of host-specific toxins. Among the seven pathotypes of A. alternata, we have studied mainly the Japanese pear pathotype, which causes black spot of Japanese pear by producing a host-specific toxin known as AK-toxin. We have pursued two independent approaches for cloning the genes. The first approach was an effort to clone the genes by complementation of the function of AK-toxin-deficient (Tox-) mutants with a cosmid genomic library from a wild-type strain. The second approach was to tag and clone the genes by restriction enzyme-mediated integration (REMI) of transforming DNA. We recently succeeded in isolating Tox mutants by REMI. The tagged genomic locus was recovered from a mutant and shown to contain the gene required for AK-toxin biosynthesis.
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Tsuge, T., Tanaka, A., Hatta, R., Shiotani, H. (1998). Molecular Analysis of AK-Toxin Biosynthesis in the Japanese Pear Pathotype of Alternaria Alternata . In: Kohmoto, K., Yoder, O.C. (eds) Molecular Genetics of Host-Specific Toxins in Plant Disease. Developments in Plant Pathology, vol 13. Springer, Dordrecht. https://doi.org/10.1007/978-94-011-5218-1_5
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DOI: https://doi.org/10.1007/978-94-011-5218-1_5
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