Toxins in Blast-diseased Rice Plants |
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| Authors: | Noriharu Umetsu Jun Kaji Keiko Aoyama Kinjiro Tamari |
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| Institution: | Department of Agricultural Chemistry, Faculty of Agriculture, Tohoku University, Sendai, Japan |
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| Abstract: | The occurence of tenuazonic acid (T.A.), which had been isolated from the culture broth of blast fungus, in blast-diseased rice plants was surveyed to ascertain whether or not this substance is one of the vivotoxins. T.A. was detected in four of six samples of blast-diseased rice plants, two of which had relatively high T.A. contents; 379 and 91 mg per kg of the samples (dry weight).Besides T.A., coumarin, o-coumaric acid and piricularin were also isolated from blast-diseased rice plants. The molecular formula of the last substance, which was tentatively presented in a previous paper, was corrected to C18H30N2O5 from the results of high resolution mass spectrometry. |
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| Keywords: | β-1 2-glucan β-1 2-glucooligosaccharide 1 2-β-oligoglucan phosphorylase β-1 2-glucanase sophorose |
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