Anisotropic growth is achieved through the additive mechanical effect of material anisotropy and elastic asymmetry
| العنوان: | Anisotropic growth is achieved through the additive mechanical effect of material anisotropy and elastic asymmetry |
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| المؤلفون: | Henrik Jönsson, Yuanjie Chen, Siobhan A. Braybrook, Firas Bou Daher, Behruz Bozorg, Jack Clough |
| المساهمون: | Bou Daher, Firas [0000-0002-7493-8662], Jönsson, Henrik [0000-0003-2340-588X], Braybrook, Siobhan A [0000-0002-4308-5580], Apollo - University of Cambridge Repository |
| المصدر: | eLife, Vol 7 (2018) Daher, FB; Chen, Y; Bozorg, B; Clough, J; Jonsson, H; & Braybrook, SA. (2018). Anisotropic growth is achieved through the additive mechanical effect of material anisotropy and elastic asymmetry. ELIFE, 7. doi: 10.7554/eLife.38161. UCLA: Retrieved from: http://www.escholarship.org/uc/item/35415328 |
| سنة النشر: | 2018 |
| مصطلحات موضوعية: | 0301 basic medicine, food.ingredient, Materials science, Pectin, QH301-705.5, Science, Germination, Microtubules, General Biochemistry, Genetics and Molecular Biology, Hypocotyl, Plant Epidermis, Cell wall, 03 medical and health sciences, chemistry.chemical_compound, food, Cellulose, Biology (General), Anisotropy, plant biology, General Immunology and Microbiology, biology, General Neuroscience, fungi, food and beverages, General Medicine, biology.organism_classification, Elasticity, Biomechanical Phenomena, Cellulose fiber, 030104 developmental biology, chemistry, Seedling, A. thaliana, Biophysics, cell wall, Medicine, Pectins, Elongation, mechanics, Biomarkers, Cell Division |
| الوصف: | Fast directional growth is a necessity for the young seedling: after germination, the seedling needs to quickly reach through the soil to begin its autotrophic life. In most dicot plants, this rapid escape is due to the anisotropic elongation of the hypocotyl, the columnar organ between the root and the shoot meristems. Such anisotropic growth is common in many plant organs and is canonically attributed to cell wall anisotropy produced by oriented cellulose fibers in the cell wall. More recently, a mechanism based on asymmetric cell wall elasticity has been proposed, produced by differential pectin biochemistry. Here we present a harmonizing model for anisotropic growth control in the dark-grown Arabidopsis hypocotyl: basic anisotropic information is provided by cellulose orientation (proxied by microtubules) and additive anisotropic information is provided by pectin-based elastic asymmetry in the epidermis. We demonstrate that hypocotyl growth was always anisotropic with axial and transverse walls growing differently, from germination. We present experimental evidence for pectin biochemical differences and wall mechanics underlying this differential growth. We demonstrate that pectin biochemical changes control the transition to rapid growth characteristic of Arabidopsis hypocotyl elongation, and provide evidence for a substantial mechanical role for pectin in the cell wall when microtubules are compromised. Lastly, our in silico modelling experiments indicate an additive combination for pectin biochemistry and cellulose orientation in promoting anisotropic growth. |
| وصف الملف: | application/pdf |
| تدمد: | 2050-084X |
| URL الوصول: | https://explore.openaire.eu/search/publication?articleId=doi_dedup___::8dd3649ef93b314487e20c1a2298771f https://pubmed.ncbi.nlm.nih.gov/30226465 |
| حقوق: | OPEN |
| رقم الأكسشن: | edsair.doi.dedup.....8dd3649ef93b314487e20c1a2298771f |
| قاعدة البيانات: | OpenAIRE |
| تدمد: | 2050084X |
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