A decade of rain exclusion in a Mediterranean forest reveals trade-offs of leaf chemical defenses and drought legacy effects

Autor: Justine Laoué, Michel Havaux, Brigitte Ksas, Jean-Philippe Orts, Ilja M. Reiter, Catherine Fernandez, Elena Ormeno

Publikováno v: Scientific Reports, Vol 14, Iss 1, Pp 1-14 (2024)

Abstract Increasing aridity in the Mediterranean region will result in longer and recurrent drought. These changes could strongly modify plant defenses, endangering tree survival. We investigate the response of chemical defenses from central and spec

Externí odkaz: https://doaj.org/article/2ba14df41ec7426a9e9169912d219b77

Imaging of Lipid Peroxidation-Associated Chemiluminescence in Plants: Spectral Features, Regulation and Origin of the Signal in Leaves and Roots

Autor: Michel Havaux, Brigitte Ksas

Publikováno v: Antioxidants, Vol 11, Iss 7, p 1333 (2022)

Plants, like most living organisms, spontaneously emit photons of visible light. This ultraweak endogenous chemiluminescence is linked to the oxidative metabolism, with lipid peroxidation constituting a major source of photons in plants. We imaged th

Externí odkaz: https://doaj.org/article/ed7d2d654d6845b598a8c07fbfb1c533

Determination of ROS-Induced Lipid Peroxidation by HPLC-Based Quantification of Hydroxy Polyunsaturated Fatty Acids

Autor: Brigitte, Ksas, Michel, Havaux

Publikováno v: Methods in molecular biology (Clifton, N.J.). 2526

Because they are highly unsaturated, plant lipids are sensitive to oxidation and constitute a primary target of reactive oxygen species. Therefore, quantification of lipid peroxidation provides a pertinent approach to evaluating oxidative stress in p

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=pmid________::d5e14e3caf4a146237f799ce7789e006
https://pubmed.ncbi.nlm.nih.gov/35657520

Plastoquinone homeostasis in plant acclimation to light intensity

Autor: Brigitte Ksas, Jean Alric, Stefano Caffarri, Michel Havaux

Publikováno v: Photosynthesis Research
Photosynthesis Research, Springer Verlag, 2022, ⟨10.1007/s11120-021-00889-1⟩
Photosynthesis Research, In press, ⟨10.1007/s11120-021-00889-1⟩

International audience; Arabidopsis plants were grown from seeds at different photon flux densities (PFDs) of white light ranging from 65 to 800 µmol photons m$^{−2}$ s$^{−1}$. Increasing PFD brought about a marked accumulation of plastoquinone

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::4af98ab6d79078c1e256348fa2d16bd8
https://hal.archives-ouvertes.fr/hal-03521179

The atypical kinase ABC1K1 interacts with the EXECUTER pathway to promote chloroplast biogenesis

Autor: Joy Collombat, Thibaut Pralon, Jenny Pego Magalhaes, Sarah Rottet, Brigitte Ksas, Gaétan Glauser, Michel Havaux, Felix Kessler, Fiamma Longoni

Multiple chloroplast-to-nucleus signaling pathways contribute to the regulation of chloroplast biogenesis during plant greening. Here, we provide evidence for the direct implication of the atypical kinase ABC1K1. ABC1K1 is required for sufficient pla

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::4596a12b5f4c3b027c5c0ff655dcfb41
https://doi.org/10.21203/rs.3.rs-1155824/v1