--- _id: '6897' abstract: - lang: eng text: The apical hook is a transiently formed structure that plays a protective role when the germinating seedling penetrates through the soil towards the surface. Crucial for proper bending is the local auxin maxima, which defines the concave (inner) side of the hook curvature. As no sign of asymmetric auxin distribution has been reported in embryonic hypocotyls prior to hook formation, the question of how auxin asymmetry is established in the early phases of seedling germination remains largely unanswered. Here, we analyzed the auxin distribution and expression of PIN auxin efflux carriers from early phases of germination, and show that bending of the root in response to gravity is the crucial initial cue that governs the hypocotyl bending required for apical hook formation. Importantly, polar auxin transport machinery is established gradually after germination starts as a result of tight root-hypocotyl interaction and a proper balance between abscisic acid and gibberellins. acknowledged_ssus: - _id: LifeSc - _id: Bio acknowledgement: "We thank Jiri Friml and Phillip Brewer for inspiring discussion and for help in preparing the manuscript. This research was supported by the Scientific Service Units (SSU) of IST-Austria through resources provided by the Bioimaging Facility\r\n(BIF), the Life Science Facility (LSF).\r\nThis work was supported by grants from the European Research Council (Starting Independent Research Grant ERC-2007-Stg- 207362-HCPO to E.B.). J.P. and M.S. received funds from European Regional Development Fund-Project ‘Centre for Experimental Plant Biology’ (No. CZ.02.1.01/0.0/0.0/16_019/0000738)." article_number: dev175919 article_processing_charge: No article_type: original author: - first_name: Qiang full_name: Zhu, Qiang id: 40A4B9E6-F248-11E8-B48F-1D18A9856A87 last_name: Zhu - first_name: Marçal full_name: Gallemi, Marçal id: 460C6802-F248-11E8-B48F-1D18A9856A87 last_name: Gallemi orcid: 0000-0003-4675-6893 - first_name: Jiří full_name: Pospíšil, Jiří last_name: Pospíšil - first_name: Petra full_name: Žádníková, Petra last_name: Žádníková - first_name: Miroslav full_name: Strnad, Miroslav last_name: Strnad - first_name: Eva full_name: Benková, Eva id: 38F4F166-F248-11E8-B48F-1D18A9856A87 last_name: Benková orcid: 0000-0002-8510-9739 citation: ama: Zhu Q, Gallemi M, Pospíšil J, Žádníková P, Strnad M, Benková E. Root gravity response module guides differential growth determining both root bending and apical hook formation in Arabidopsis. Development. 2019;146(17). doi:10.1242/dev.175919 apa: Zhu, Q., Gallemi, M., Pospíšil, J., Žádníková, P., Strnad, M., & Benková, E. (2019). Root gravity response module guides differential growth determining both root bending and apical hook formation in Arabidopsis. Development. The Company of Biologists. https://doi.org/10.1242/dev.175919 chicago: Zhu, Qiang, Marçal Gallemi, Jiří Pospíšil, Petra Žádníková, Miroslav Strnad, and Eva Benková. “Root Gravity Response Module Guides Differential Growth Determining Both Root Bending and Apical Hook Formation in Arabidopsis.” Development. The Company of Biologists, 2019. https://doi.org/10.1242/dev.175919. ieee: Q. Zhu, M. Gallemi, J. Pospíšil, P. Žádníková, M. Strnad, and E. Benková, “Root gravity response module guides differential growth determining both root bending and apical hook formation in Arabidopsis,” Development, vol. 146, no. 17. The Company of Biologists, 2019. ista: Zhu Q, Gallemi M, Pospíšil J, Žádníková P, Strnad M, Benková E. 2019. Root gravity response module guides differential growth determining both root bending and apical hook formation in Arabidopsis. Development. 146(17), dev175919. mla: Zhu, Qiang, et al. “Root Gravity Response Module Guides Differential Growth Determining Both Root Bending and Apical Hook Formation in Arabidopsis.” Development, vol. 146, no. 17, dev175919, The Company of Biologists, 2019, doi:10.1242/dev.175919. short: Q. Zhu, M. Gallemi, J. Pospíšil, P. Žádníková, M. Strnad, E. Benková, Development 146 (2019). date_created: 2019-09-22T22:00:36Z date_published: 2019-09-12T00:00:00Z date_updated: 2023-08-30T06:19:04Z day: '12' department: - _id: EvBe doi: 10.1242/dev.175919 ec_funded: 1 external_id: isi: - '000486297400011' pmid: - '31391194' intvolume: ' 146' isi: 1 issue: '17' language: - iso: eng main_file_link: - open_access: '1' url: https://doi.org/10.1242/dev.175919 month: '09' oa: 1 oa_version: Published Version pmid: 1 project: - _id: 253FCA6A-B435-11E9-9278-68D0E5697425 call_identifier: FP7 grant_number: '207362' name: Hormonal cross-talk in plant organogenesis publication: Development publication_identifier: eissn: - '14779129' publication_status: published publisher: The Company of Biologists quality_controlled: '1' scopus_import: '1' status: public title: Root gravity response module guides differential growth determining both root bending and apical hook formation in Arabidopsis type: journal_article user_id: 4359f0d1-fa6c-11eb-b949-802e58b17ae8 volume: 146 year: '2019' ...