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The fungal toxin Fumonisin B1 (FB1) is a strong inducer to trigger plant hypersensitive responses (HR) along with increased long chain bases (LCB) and long chain base phosphates (LCBP) contents, though the regulatory mechanism of FB1 action and how the LCB/LCBP signalling cassette functions during the process is still not fully understood. Here, we report sphingosine kinase 1 (SPHK1) as a key factor...
In our previous proteomic analysis, we isolated a small GTPase RabG3b as a salicylic acid-responsive protein in Arabidopsis (Oh et al. in Plant Cell 17:2832–2847, 2005). Here, we constructed transgenic plants overexpressing wild-type (RabG3bOX), constitutively active (RabG3bCA), and dominant negative (RabG3bDN) forms of RabG3b for functional studies. The phenotypes of these transgenic plants were...
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