Hélène Fouassier

Laboratoire de Recherche en Sciences Végétales

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Malick Mbengué

Centre National de la Recherche Scientifique

Amandine Lucchin

Laboratoire de Recherche en Sciences Végétales

Jacinthe Azevedo

Laboratoire Génome et Développement des Plantes

Dominique Pontier

Laboratoire Génome et Développement des Plantes

Natacha Bies‐Etheve

Laboratoire Génome et Développement des Plantes

Lucid Belmudes

Université Grenoble Alpes

Richard Sibout

Biopolymères Interactions Assemblages

Jean‐Philippe Galaud

Centre National de la Recherche Scientifique

Yadienka Martinez‐Rubi

Laboratoire des Interactions Plantes Micro-Organismes

Fabien Mounet

Laboratoire de Recherche en Sciences Végétales

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Centre National de la Recherche Scientifique

Université de Toulouse

Laboratoire de Recherche en Sciences Végétales

Université Toulouse III - Paul Sabatier

Laboratoire Génome et Développement des Plantes

Université de Perpignan

Laboratoire des Interactions Plantes Micro-Organismes

Université Grenoble Alpes

École Normale Supérieure de Lyon

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Control of secondary cell wall formation by Musashi-type translational regulators in trees.

Hélène Fouassier Alicia Kairouani Dominique Pontier Catherine Picart Yadienka Martinez‐Rubi

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The calcium sensor AtCML8 contributes to Arabidopsis plant cell growth by modulating the brassinosteroid signaling pathway

The Plant Journal (2024)

Amandine Lucchin Hélène Fouassier Eugénie Robe Malick Mbengué Marielle Aguilar

SUMMARY Calcium signaling plays an essential role in integrating plant responses to diverse stimuli and regulating growth and development. While some signaling components and their roles are well‐established, such as the ubiquitous calmodulin (CaM) sensor, plants possess a broader repertoire of calcium sensors. Notably, CaM‐like proteins (CMLs) represent a poorly characterized class for which interacting partners and biological functions remain largely elusive. Our work investigates the role of Arabidopsis thaliana CML8 that exhibits a unique expression profile in seedlings. A reverse genetic approach revealed a function of CML8 in regulating root growth and hypocotyl elongation. RNA‐seq analyses highlighted CML8 association with the regulation of numerous genes involved in growth and brassinosteroid (BR) signaling. Using co‐immunoprecipitation experiments, we demonstrated that CML8 interacts with the BR receptor, BRI1, in planta in a ligand‐dependent manner. This finding suggests the existence of a novel regulatory step in the BR pathway, involving calcium signaling.

Brassinosteroid

Calcium Signaling

10.1111/tpj.17179

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