THESEUS1 modulates cell wall stiffness and abscisic acid production in
| Autor: | Julia Schulz, Svanhild Johannessen-Starheim, Jérémie Margueritat, Zdenka Bartosova, Joachim M. Gerhold, Scott A. M. McAdam, Thorsten Hamann, Lauri Vaahtera, Nora Gigli-Bisceglia, Guqi Yan, Hannes Kollist, Thomas Dehoux, Timo Engelsdorf, Tereza Tichá, Laura Bacete, Camilla Øvstebø |
|---|---|
| Rok vydání: | 2021 |
| Předmět: |
0106 biological sciences
Turgor pressure Arabidopsis Plant Biology 01 natural sciences Plant Roots Cell wall 03 medical and health sciences chemistry.chemical_compound Isomerism Cell Wall plant cell wall Arabidopsis thaliana Homeostasis Mode of action Abscisic acid 030304 developmental biology 0303 health sciences Multidisciplinary biology Abiotic stress Arabidopsis Proteins Jasmonic acid fungi cell wall integrity food and beverages 15. Life on land Biological Sciences Plant cell biology.organism_classification Cell biology THE1 chemistry Seedlings Perception Peptides 010606 plant biology & botany Abscisic Acid |
| Zdroj: | Proceedings of the National Academy of Sciences of the United States of America |
| ISSN: | 1091-6490 |
| Popis: | Significance Plants need to constantly adapt to a changing environment. Adaptation includes responses to biotic and abiotic stress. Key elements determining the response to abiotic stress are the cell walls surrounding all plant cells and the phytohormone abscisic acid, which influence turgor pressure in plants. Turgor pressure in plant cells is much higher than in animal cells and a key driver of plant growth and development. Here, we investigate the mechanism regulating cell wall stiffness and coordinating changes in stiffness and turgor with abscisic acid production. We characterize key elements of the mechanism and dissect its mode of action. This knowledge will enable us to improve plant resistance to drought stress, which is necessary due to our changing environment. Plant cells can be distinguished from animal cells by their cell walls and high-turgor pressure. Although changes in turgor and the stiffness of cell walls seem coordinated, we know little about the mechanism responsible for coordination. Evidence has accumulated that plants, like yeast, have a dedicated cell wall integrity maintenance mechanism. It monitors the functional integrity of the wall and maintains integrity through adaptive responses induced by cell wall damage arising during growth, development, and interactions with the environment. These adaptive responses include osmosensitive induction of phytohormone production, defense responses, as well as changes in cell wall composition and structure. Here, we investigate how the cell wall integrity maintenance mechanism coordinates changes in cell wall stiffness and turgor in Arabidopsis thaliana. We show that the production of abscisic acid (ABA), the phytohormone-modulating turgor pressure, and responses to drought depend on the presence of a functional cell wall. We find that the cell wall integrity sensor THESEUS1 modulates mechanical properties of walls, turgor loss point, ABA biosynthesis, and ABA-controlled processes. We identify RECEPTOR-LIKE PROTEIN 12 as a component of cell wall integrity maintenance–controlling, cell wall damage–induced jasmonic acid (JA) production. We propose that THE1 is responsible for coordinating changes in turgor pressure and cell wall stiffness. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|