FERONIA and microtubules independently contribute to mechanical integrity in the Arabidopsis shoot

Malivert, Alice and Erguvan, Özer and Chevallier, Antoine and Dehem, Antoine and Friaud, Rodrigue and Liu, Mengying and Martin, Marjolaine and Peyraud, Théophile and Hamant, Olivier and Verger, Stéphane and Estelle, Mark (2021) FERONIA and microtubules independently contribute to mechanical integrity in the Arabidopsis shoot. PLOS Biology, 19 (11). e3001454. ISSN 1545-7885

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Abstract

To survive, cells must constantly resist mechanical stress. In plants, this involves the reinforcement of cell walls, notably through microtubule-dependent cellulose deposition. How wall sensing might contribute to this response is unknown. Here, we tested whether the microtubule response to stress acts downstream of known wall sensors. Using a multistep screen with 11 mutant lines, we identify FERONIA (FER) as the primary candidate for the cell’s response to stress in the shoot. However, this does not imply that FER acts upstream of the microtubule response to stress. In fact, when performing mechanical perturbations, we instead show that the expected microtubule response to stress does not require FER. We reveal that the feronia phenotype can be partially rescued by reducing tensile stress levels. Conversely, in the absence of both microtubules and FER, cells appear to swell and burst. Altogether, this shows that the microtubule response to stress acts as an independent pathway to resist stress, in parallel to FER. We propose that both pathways are required to maintain the mechanical integrity of plant cells.

Item Type: Article
Subjects: European Scholar > Biological Science
Depositing User: Managing Editor
Date Deposited: 28 Feb 2023 05:43
Last Modified: 05 Jul 2024 09:17
URI: http://article.publish4promo.com/id/eprint/1001

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