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Plant and Cell Physiology, 1982, Vol. 23, No. 8 1357-1361
© 1982

Article

Localization of Purothionins and Genome Expression in Wheat Plants

Keishiro Wada

Department of Biology, Faculty of Science, Osaka University Toyonaka, Osaka 560, Japan

The leaves, steins and ears of tetraploidal wheat, Triticum durum (genomes AABB) harvested two weeks after heading were analyzed for purothionins. There were considerable amounts of two iso-purothionins (Pu-1 and Pu-2) in the young kernels of the ears, but not in the leaves and stems. The amino acid compositions of Pu-1 and Pu-2 were in good agreement with those of Pu I and Pu II from hexaploidal wheat. As diploidal wheat, T. monococcum (genome AA) is known to produce only Pu I [Fernandez de Caleya et al. (1976) Genetics 83: 687], we conclude that the three iso-purothionins, Pu I, Pu II and Pu III in hexaploidal wheat, T. aestivum (genomes AABBDD), are encoded by the genes of genomes A, B and D, respectively.

(Received June 28, 1982; Accepted September 24, 1982)
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