Chemical Composition of Uredospores of Wheat Stem Rust (Puccinia graminis tritici)


ONE approach to the problem of controlling wheat stem rust is the study of the chemistry of the parasite. As part of an investigation into the chemical nature of wheat stem rust, a preliminary examination has been made of uredospores of Puccinia graminis tritici. When uredospores of mixed races are subjected to the action of 72 per cent sulphuric acid for 24 hr. at room temperature (23° C.) and then heated with 2 N sulphuric acid in a sealed tube immersed in boiling water for 16 hr., D-glucose, D-mannose and D-arabitol are liberated. These three substances were identified by paper chromatography using ethyl acetate–acetic acid–water (3:1:3)1. By means of a cellulose column and the same irrigating solvent, enough of each of these three components was separated in order to provide crystalline derivatives thus:

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PRENTICE, N., CUENDET, L. Chemical Composition of Uredospores of Wheat Stem Rust (Puccinia graminis tritici). Nature 174, 1151 (1954) doi:10.1038/1741151a0

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