ausblenden:
Schlagwörter:
-
Zusammenfassung:
The plant hormone abscisic acid regulates adaptation to environmental stresses, particularly drought. How plants cope with multiple stresses, especially when challenged with pathogen infection and then drought, remains largely unknown. The tolerance mechanisms against the two stresses often negatively affect each other. However, the underlying mechanisms remain unknown. Using a chemical genetics approach that can address genetic redundancy and network robustness, a novel small molecule “DFPM” was identified that down-regulates abscisic acid signaling by activating plant immune responses (1-3). To dissect this interference signaling, an Arabidopsis thaliana reporter line harboring an ABA-inducible marker pRAB18:GFP was EMS mutagenized and screened for hyposensitive responses to DFPM. rda (resistant to DFPM inhibition of ABA signaling) mutants were isolated and mapped to a putative receptor-like kinase. Further characterization of the functions of this receptor-like kinase in plant immune signaling and interference mechanisms with ABA signaling will be presented. This research will help understand how plants exposed to both pathogen and drought can coordinate effective tolerance responses which will be relevant for plant survival and crop yield.
