PuSH - Publication Server of Helmholtz Zentrum München: UPLC-ESI-TOF-MS profiling of metabolome alterations in barley (<em>Hordeum vulgare</em> L.) leaves induced by <em>Bipolaris sorokiniana</em>.

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Kurzweil, L.* ; Stark, T.D.* ; Hille, K.* ; Hoheneder, F.* ; Mrtva, J.* ; Hausladen, J.* ; Lenk, M. ; Motawia, M.S.* ; Strittmatter, N.* ; Vlot, A.C. ; Pillen, K.* ; So̷rensen, M.* ; Mo̷ller, B.L.* ; Hückelhoven, R.* ; Dawid, C.*

UPLC-ESI-TOF-MS profiling of metabolome alterations in barley (Hordeum vulgare L.) leaves induced by Bipolaris sorokiniana.

J. Agric. Food Chem. 73, 24662–24687 (2025)

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Spot blotch of barley (Hordeum vulgare L.), caused by Bipolaris sorokiniana, is responsible for major losses in crop yield. Breeding-resistant barley varieties have proven to be an effective countermeasure for protecting agricultural production. Plants react to pathogen attacks by up-regulating secondary metabolites. Marker compounds for a B. sorokiniana infection are examined by untargeted UPLC-TOF-MS metabolomics and lipidomics techniques. Through the analysis of nine quantitatively resistant and susceptible barley genotypes, derived from the nested association mapping population HEB-25, followed by structure identification experiments and spore germination assays, 57 metabolites are identified. In addition to previously known metabolites, the unknown compounds 5-carboxydidehydroblumenol C-9-O-ß-d-glucoside (46) and grasshopper ketone 3-sulfate (47) were elucidated. 5-Carboxyblumenol C-9-O-ß-d-glucoside (45) was described for the first time in barley leaves. Pheophytin derivatives, oxylipins, linolenate-conjugated lipids, and flavone glycosides were described for the first time in connection with infections by phytopathogenic fungi or resistance in barley.

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