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bioRxiv · 10.1101/704601

An Evolutionarily Conserved Receptor-like Kinases Signaling Module Controls Cell Wall Integrity During Tip-Growth

Westermann, J.·Streubel, S.·Franck, C. M. M.·Lentz, R.·Dolan, L.·Boisson-Dernier, A.
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Abstract

Rooting cells and pollen tubes - key adaptative innovations that evolved during the colonization and subsequent radiation of plants on land - expand by tip-growth. Tip-growth relies on a tight coordination between the protoplast growth and the synthesis/remodeling of the external cell wall. In root hairs and pollen tubes of the seed plant Arabidopsis thaliana, cell wall integrity (CWI) mechanisms monitor this coordination through the Malectin-like receptor kinases (MLRs) such as AtANXUR1 and AtFERONIA that act upstream of the AtMARIS PTI1-like kinase. Here, we show that rhizoid growth in the early diverging plant, Marchantia polymorpha, is also controlled by an MLR and PTI1-like signaling module. Rhizoids, root hairs and pollen tubes respond similarly to disruption of MLR and PTI1-like encoding genes. Thus, the MLR/PTI1-like signaling module that controls CWI during tip-growth is conserved between M. polymorpha and A. thaliana suggesting it was active in the common ancestor of land plants.

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Westermann, J., Streubel, S., Franck, C. M. M., Lentz, R., Dolan, L., Boisson-Dernier, A.. 2019-07-17. An Evolutionarily Conserved Receptor-like Kinases Signaling Module Controls Cell Wall Integrity During Tip-Growth. https://doi.org/10.1101/704601

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