“Interplay between plant cell walls and jasmonate production”

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Tuesday 11 April 2017, 15:00 - 16:30

 
ABSTRACT

In order to adapt to environmental fluctuations, plants have developed elaborate sensing mechanisms that respond to external cues and incorporate them in basal development. One such plant response to wounding or herbivory is the production of jasmonic acid (JA) and its biologically active conjugate JA-Ile, which triggers the transcriptional changes necessary to mount defense responses and halt growth. Upon a JA-inducing stimulus, JA synthesis is initiated in plastids from the enzymatic oxidation of specific poly-unsaturated fatty acids. Although key steps in JA biosynthesis and signalling are well characterized, it is still unknown how are extracellular damage signals perceived and transmitted to plastids to initiate JA production. By using genetic approaches in Arabidopsis thaliana, we have identified negative regulators of JA synthesis in genes involved in cell wall biogenesis.  As plant cell walls constitute the first line of defense against many biotic and abiotic stresses, we are employing those cell wall mutants to unveil novel cell wall-to-plastid signalling pathways, as well as to characterize the physiological interplay between plant cell walls and JA biosynthesis. Our efforts are aimed at enhancing the basic knowledge of how plants perceive, transmit and integrate information about their environment to prompt adaptive metabolic and growth responses.

Location Jozef Schell Seminar Room
Contact Dr Debora Gasperini
Leibniz Institute of Plant Biochemistry
Department of Molecular Signal Processing
Halle
GERMANY