Molecular Basis of Disease Resistance Acquired through Cold Acclimation in Overwintering Plants |
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Authors: | Chikako Kuwabara Ryozo Imai |
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Institution: | (1) Crop Cold Tolerance Research Team, National Agricultural Research Center for Hokkaido Region, National Agriculture and Food Research Organization (NARO), Hitsujigaoka 1, Toyohira-ku, Sapporo 062-8555, Japan |
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Abstract: | Plants require substantial resistance against freezing and pathogens for overwintering. These two traits are acquired through
cold acclimation. In contrast to freezing tolerance, molecular basis of disease resistance acquired through cold acclimation
is poorly understood. Recent studies have suggested that pathogenesis-related (PR) proteins that are secreted into the apoplast
during cold acclimation are responsible for the disease resistance. Interestingly, some of the cold-induced PR proteins display
both antifungal and antifreeze activities, suggesting a dual function in protecting plants from overwintering stresses. The
signaling pathway for cold-induced disease resistance is currently unknown but can be independent of pathogen-induced defense
mechanisms. |
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Keywords: | Antifreeze protein Apoplast Cold acclimation Snow mold Pathogenesis-related protein |
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