期刊
FEBS LETTERS
卷 585, 期 19, 页码 3006-3010出版社
ELSEVIER SCIENCE BV
DOI: 10.1016/j.febslet.2011.08.016
关键词
Sphingolipid; Reactive oxygen species; Cell death; Arabidopsis thaliana
资金
- DFG [GK1342]
Sphingolipids are implied in several regulatory processes, including cell death. Levels of the free sphingobase t18:0 (phytosphingosine) increase in Arabidopsis in response to the bacterial pathogen Pseudomonas syringae. To gain information on sphingobase-induced signaling, we determined kinetics of leaf reactive oxygen species (ROS) levels and cell death in response to specific sphingobases. t18:0, d18:0 and d17:1, but not d20:0, induced ROS and cell death within 1.5-2 h. Early sphingobase-induced ROS production was independent of cell death induction and required the NADPH oxidase Respiratory Burst Oxidase Homolog D (RBOHD). Specific sphingobases can therefore induce cell death and require RBOHD for early ROS induction in plants. (C) 2011 Federation of European Biochemical Societies. Published by Elsevier B.V. All rights reserved.
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