Interactions between cold hardening and Microdochium nivale infection on expression of pathogenesis-related genes in winter wheat
1998
Ergon, A. | Klemsdal, S.S. | Tronsmo, A.M.
old hardening induces snow mould resistance in cereals and grasses. The mechanism for this induced resistance is not fully understood. The accumulation of transcripts encoding sucrose synthase and the pathogenesis-related protein (PR-proteins) chitinase, beta-1,3-glucanase, peroxidase and PR-1a were studied in hardened and non-hardened winter wheat at several time points after inoculation with the snow mould Microdochium nivale. Sucrose synthase was induced by the hardening treatment itself. The PR-proteins were all induced by infection, this response was stronger and more rapid in plants that had been hardened prior to inoculation. The present results suggest that cold hardening has a conditioning effect on snow mould induced expression of PR-proteins. This may partly explain how cold hardening induces snow mould resistance.
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