New Insights Into UV-B-Regulated Photoprotection And Growth Revealed By The Study Of Natural Variation In Arabidopsis thaliana

Diplôme Master New Insights Into UV-B-Regulated Photoprotection And Growth Revealed By The Study Of Natural Variation In Arabidopsis thaliana eng 2024-09-02 author Grometto Charlotte Emma 895236 director Demarsy Emilie 867450 Département des sciences végétales (BIVEG) 89 Light is a crucial environmental cue for plant growth and development but can represent an abiotic stress factor when in excess or insufficient. Moreover, certain parts of the light spectrum, particularly the ultraviolet-B (UV-B, 280-315 nm), represent a significant threat by damaging DNA and causing the accumulation of reactive oxygen species (ROS). As sessile organisms, plants cannot escape UV-B stress and damage. Plants possess multiple photoreceptors that can perceive specific wavelengths and trigger appropriate downstream signaling responses, regulating major physiological processes. For instance, UV RESISTANCE LOCUS 8 (UVR8) efficiently perceives UV wavelengths. UVR8-mediated responses to UV-B include photomorphogenic changes such as de-etiolation and acclimatory responses involving the accumulation of UV-B-absorbing secondary metabolites like sinapate esters or other phenylpropanoid derivatives. As the availability of several resources is limiting to plants, trade-offs between growth and defense responses are common under stress conditions. However, the relationship between photomorphogenic and acclimatory responses to UV-B remains to be elucidated. This study investigates the potential trade-offs between these two sets of responses using multiple approaches. Dewey 580 Molecular Plant Sciences (MPS) 45 Département des sciences végétales 163 false 832 Groupe Ulm 5377ece0-376e-4d47-971e-6e4e9a20426c Master thesis Restricted MasterThesis_Grometto.pdf 47758453 application/pdf 832bc5ff4a023e7d0cb54cb5ae92365dfaeb93b8f99b7e1691d7563c826bec73 restrictedAccess Faculté des sciences / Section de biologie / Département des sciences végétales

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New Insights Into UV-B-Regulated Photoprotection And Growth Revealed By The Study Of Natural Variation In Arabidopsis thaliana				2024	79	6

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