Glucose modulates proliferation in root apical meristems via TOR in maize during germination
| Autor: | Jesús Flores-Sánchez, Sonia Vázquez-Santana, Roxana Olguin-Alor, Kenia Salazar-Díaz, Jorge M. Vázquez-Ramos, Jorge Manuel López-López, Tzvetanka D. Dinkova, Aurora Lara-Núñez, Víctor Hugo Díaz-Granados, Andrea Bedoya-López |
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| Rok vydání: | 2020 |
| Předmět: |
0106 biological sciences
0301 basic medicine Physiology Meristem Germination Plant Science 01 natural sciences Plant Roots Zea mays 03 medical and health sciences Cyclin-dependent kinase Genetics Cyclin Cell Proliferation biology Cell growth Cell cycle Cell Cycle Gene Cell biology 030104 developmental biology Glucose Seeds biology.protein Cellularization 010606 plant biology & botany |
| Zdroj: | Plant physiology and biochemistry : PPB. 155 |
| ISSN: | 1873-2690 |
| Popis: | The Glucose-Target of Rapamycin (Glc-TOR) pathway has been studied in different biological systems, but scarcely during early seed germination. This work examines its importance for cell proliferation, expression of cell cycle key genes, their protein levels, besides morphology and cellularization of the root apical meristem of maize (Zea mays) embryo axes during germination under the influence of two simple sugars, glucose and sucrose, and a specific inhibitor of TOR activity, AZD 8055. The two sugars promote germination similarly and to an extent, independently of TOR activity. However, the Glc-TOR pathway increases the number of cells committed to proliferation, increasing the expression of a cell cycle gene, ZmCycD4;2, a putative G1/S regulator. Also, Glc-TOR may have influence on the protein stability of another G1/S cyclin, ZmCycD3, but had no influence on ZmCDKA;1 or ZmKRP3 or their proteins. Results suggest that the Glc-TOR pathway participates in the regulation of proliferation through different mechanisms that, in the end, modify the timing of seed germination. |
| Databáze: | OpenAIRE |
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