Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
5592623 | Physiological and Molecular Plant Pathology | 2017 | 43 Pages |
Abstract
The lipid transfer protein (LTP) DEFECTIVE IN INDUCED RESISTANCE1 (DIR1) is a key mobile component of the systemic acquired resistance (SAR) response. Recent evidence suggests that a DIR1-like paralog occasionally compensates for the loss of DIR1 in the dir1-1 Ws-2 mutant. Here, we demonstrate that a dir1-2 mutant in the Col-0 background is SAR-defective, while DIR1-like knockdowns are SAR-competent. Moreover, protein-protein interaction assays demonstrate that DIR1 interacts with DIR1-like and other LTPs. Further investigation of these LTPs suggests a role for LTP2 in SAR. Our results highlight the importance of multiple lipid transfer proteins for SAR in Arabidopsis.
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Plant Science
Authors
Philip Carella, Christine J. Kempthorne, Daniel C. Wilson, Marisa Isaacs, Robin K. Cameron,