Section 7
Chapter 6,518

Studies on the host specific patho toxins produced by bipolaris maydis race t characterization of the minor carbon 35 components carbon 47 components and carbon 49 components of the toxin complex and evidence bearing on the stereochemistry of hydroxyl groups

Kono, Y.; Takeuchi, S.; Kawarada, A.; Daly, J.M.; Knoche, H.W.

Agricultural and Biological Chemistry 45(9): 2111-2116


ISSN/ISBN: 0002-1369
Accession: 006517475

The host-specific pathotoxin complex isolated from the culture filtrate and mycelial mat of Bipolaris (Helminthosporium) maydis [southern corn blight pathogen] race T, was reduced to hydrocarbons. The hydrocarbons were separated by molecular sieves and analyzed by GC[gas chromatography]-MS [mass spectrometry]. The MS gave typical spectra of normal, odd C numbered hydrocarbons from C35H72 to C49H100. Compounds differing from hydrocarbons only in the presence of an internal tetrahydropyran ring were obtained as by-products from the toxin-complex reductions. These compounds were analyzed by CI (chemical ionization)-GC-MS and HR (high resolution)-GC-MS. The MS data supported the hypothesis that the C35- to C49-toxins are analogous compounds with many common partial structures. The configurations at both the C-6 and C-8 carbons of the major components apparently were R.

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