AUXIN DISTRIBUTION IN A TRANSVERSE ROOT SECTION
Plants differ in the types of the root central cylinder: diarch, triarch, tetrarch, pentarch, or polyarch. The type of the symmetry is the reflection of the relative positions of xylem and phloem bundles in a cross section of the root. The mechanisms forming different types of symmetries in the cent...
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| Format: | Article |
| Language: | English |
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Siberian Branch of the Russian Academy of Sciences, Federal Research Center Institute of Cytology and Genetics, The Vavilov Society of Geneticists and Breeders
2015-01-01
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| Series: | Вавиловский журнал генетики и селекции |
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| Online Access: | https://vavilov.elpub.ru/jour/article/view/326 |
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| author | E. S. Novoselova V. V. Mironova T. M. Khlebodarova V. A. Likhoshvai |
| author_facet | E. S. Novoselova V. V. Mironova T. M. Khlebodarova V. A. Likhoshvai |
| author_sort | E. S. Novoselova |
| collection | DOAJ |
| description | Plants differ in the types of the root central cylinder: diarch, triarch, tetrarch, pentarch, or polyarch. The type of the symmetry is the reflection of the relative positions of xylem and phloem bundles in a cross section of the root. The mechanisms forming different types of symmetries in the central cylinder remain poorly understood. It is assumed that vasculature differentiation is triggered and controlled by plant hormone auxin (Sachs, 1969). We have developed a model that describes auxin flow through a cell layer, imitating a cross section of the vascular cylinder in a root. We have studied the stationary distributions of auxin in the cell layer depending on the model parameters. It is shown that the nonlinear processes of auxin transport regulation are responsible for the formation of asymmetric auxin distributions, which may be interpreted as the positional information for development of the diarch structure of the vascular cylinder. However, these distributions always coexist with uniform stationary distributions, not providing positional information. It is hypothesized that the most likely factor in the formation of the final auxin distribution in a root section is an appropriate geometry of the auxin flow from the shoot to the root. |
| format | Article |
| id | doaj-art-8813e06cd9ff46bbbbefda2a32985fbf |
| institution | Kabale University |
| issn | 2500-3259 |
| language | English |
| publishDate | 2015-01-01 |
| publisher | Siberian Branch of the Russian Academy of Sciences, Federal Research Center Institute of Cytology and Genetics, The Vavilov Society of Geneticists and Breeders |
| record_format | Article |
| series | Вавиловский журнал генетики и селекции |
| spelling | doaj-art-8813e06cd9ff46bbbbefda2a32985fbf2025-02-01T09:58:01ZengSiberian Branch of the Russian Academy of Sciences, Federal Research Center Institute of Cytology and Genetics, The Vavilov Society of Geneticists and BreedersВавиловский журнал генетики и селекции2500-32592015-01-01184/2953962309AUXIN DISTRIBUTION IN A TRANSVERSE ROOT SECTIONE. S. Novoselova0V. V. Mironova1T. M. Khlebodarova2V. A. Likhoshvai3Institute of Cytology and Genetics SB RAS, Novosibirsk, RussiaInstitute of Cytology and Genetics SB RAS, Novosibirsk, Russia Novosibirsk National Research State University, Novosibirsk, RussiaInstitute of Cytology and Genetics SB RAS, Novosibirsk, RussiaInstitute of Cytology and Genetics SB RAS, Novosibirsk, Russia Novosibirsk National Research State University, Novosibirsk, RussiaPlants differ in the types of the root central cylinder: diarch, triarch, tetrarch, pentarch, or polyarch. The type of the symmetry is the reflection of the relative positions of xylem and phloem bundles in a cross section of the root. The mechanisms forming different types of symmetries in the central cylinder remain poorly understood. It is assumed that vasculature differentiation is triggered and controlled by plant hormone auxin (Sachs, 1969). We have developed a model that describes auxin flow through a cell layer, imitating a cross section of the vascular cylinder in a root. We have studied the stationary distributions of auxin in the cell layer depending on the model parameters. It is shown that the nonlinear processes of auxin transport regulation are responsible for the formation of asymmetric auxin distributions, which may be interpreted as the positional information for development of the diarch structure of the vascular cylinder. However, these distributions always coexist with uniform stationary distributions, not providing positional information. It is hypothesized that the most likely factor in the formation of the final auxin distribution in a root section is an appropriate geometry of the auxin flow from the shoot to the root.https://vavilov.elpub.ru/jour/article/view/326mathematical modelingmorphogenauxinrootvascular tissue differentiationphloemxylem |
| spellingShingle | E. S. Novoselova V. V. Mironova T. M. Khlebodarova V. A. Likhoshvai AUXIN DISTRIBUTION IN A TRANSVERSE ROOT SECTION Вавиловский журнал генетики и селекции mathematical modeling morphogen auxin root vascular tissue differentiation phloem xylem |
| title | AUXIN DISTRIBUTION IN A TRANSVERSE ROOT SECTION |
| title_full | AUXIN DISTRIBUTION IN A TRANSVERSE ROOT SECTION |
| title_fullStr | AUXIN DISTRIBUTION IN A TRANSVERSE ROOT SECTION |
| title_full_unstemmed | AUXIN DISTRIBUTION IN A TRANSVERSE ROOT SECTION |
| title_short | AUXIN DISTRIBUTION IN A TRANSVERSE ROOT SECTION |
| title_sort | auxin distribution in a transverse root section |
| topic | mathematical modeling morphogen auxin root vascular tissue differentiation phloem xylem |
| url | https://vavilov.elpub.ru/jour/article/view/326 |
| work_keys_str_mv | AT esnovoselova auxindistributioninatransverserootsection AT vvmironova auxindistributioninatransverserootsection AT tmkhlebodarova auxindistributioninatransverserootsection AT valikhoshvai auxindistributioninatransverserootsection |