Comparative Analysis of Metabolites of CAD-im Genotypes of Spring Bread Wheat under Brown Rust Infection

Abstract

Determination of the role of specific genes and their products in plant resistance to stress factors, including those of a biotic nature, is an urgent task of phytopathology and provides additional information for practical use. For spring bread wheat Triticum aestivum, CAD-im genotypes (Cinnamyl alcohol dehydrogenase, cinnamyl alcohol dehydrogenase; EC 1.1.1.195) affecting leaf rust (Puccinia triticina) resistance were studied. Resistant and susceptible genotypes were grown on an infectious background and in its absence. Plant tissues were studied for a number of indicators, including the content of phenylpropanoid metabolites, as well as sterols and saponins. Phenylpropanoids show an increase in a number of metabolites due to infection, especially coniferyl acetate and synapic aldehyde. A decrease in the content of some sterols under the influence of infection in the resistant CADim+ ge-notype was found. It is assumed that the acetate-mevalonate pathway of metabolism in the resistant genotype CADim+ changes under the influence of infection from the synthesis of sterols to the synthesis of protective substances, phytoalexins.