--- _id: '6262' abstract: - lang: eng text: "Gravitropism is an adaptive response that orients plant growth parallel to the gravity vector. Asymmetric\r\ndistribution of the phytohormone auxin is a necessary prerequisite to the tropic bending both in roots and\r\nshoots. During hypocotyl gravitropic response, the PIN3 auxin transporter polarizes within gravity-sensing\r\ncells to redirect intercellular auxin fluxes. First gravity-induced PIN3 polarization to the bottom cell mem-\r\nbranes leads to the auxin accumulation at the lower side of the organ, initiating bending and, later, auxin\r\nfeedback-mediated repolarization restores symmetric auxin distribution to terminate bending. Here, we per-\r\nformed a forward genetic screen to identify regulators of both PIN3 polarization events during gravitropic\r\nresponse. We searched for mutants with defective PIN3 polarizations based on easy-to-score morphological\r\noutputs of decreased or increased gravity-induced hypocotyl bending. We identified the number of\r\nhypocotyl reduced bending (hrb) and hypocotyl hyperbending (hhb) mutants, revealing that reduced bending corre-\r\nlated typically with defective gravity-induced PIN3 relocation whereas all analyzed hhb mutants showed\r\ndefects in the second, auxin-mediated PIN3 relocation. Next-generation sequencing-aided mutation map-\r\nping identified several candidate genes, including SCARECROW and ACTIN2, revealing roles of endodermis\r\nspecification and actin cytoskeleton in the respective gravity- and auxin-induced PIN polarization events.\r\nThe hypocotyl gravitropism screen thus promises to provide novel insights into mechanisms underlying cell\r\npolarity and plant adaptive development." article_processing_charge: Yes (via OA deal) article_type: original author: - first_name: Hana full_name: Rakusová, Hana last_name: Rakusová - first_name: Huibin full_name: Han, Huibin id: 31435098-F248-11E8-B48F-1D18A9856A87 last_name: Han - first_name: Petr full_name: Valošek, Petr id: 3CDB6F94-F248-11E8-B48F-1D18A9856A87 last_name: Valošek - first_name: Jiří full_name: Friml, Jiří id: 4159519E-F248-11E8-B48F-1D18A9856A87 last_name: Friml orcid: 0000-0002-8302-7596 citation: ama: Rakusová H, Han H, Valošek P, Friml J. Genetic screen for factors mediating PIN polarization in gravistimulated Arabidopsis thaliana hypocotyls. The Plant Journal. 2019;98(6):1048-1059. doi:10.1111/tpj.14301 apa: Rakusová, H., Han, H., Valošek, P., & Friml, J. (2019). Genetic screen for factors mediating PIN polarization in gravistimulated Arabidopsis thaliana hypocotyls. The Plant Journal. Wiley. https://doi.org/10.1111/tpj.14301 chicago: Rakusová, Hana, Huibin Han, Petr Valošek, and Jiří Friml. “Genetic Screen for Factors Mediating PIN Polarization in Gravistimulated Arabidopsis Thaliana Hypocotyls.” The Plant Journal. Wiley, 2019. https://doi.org/10.1111/tpj.14301. ieee: H. Rakusová, H. Han, P. Valošek, and J. Friml, “Genetic screen for factors mediating PIN polarization in gravistimulated Arabidopsis thaliana hypocotyls,” The Plant Journal, vol. 98, no. 6. Wiley, pp. 1048–1059, 2019. ista: Rakusová H, Han H, Valošek P, Friml J. 2019. Genetic screen for factors mediating PIN polarization in gravistimulated Arabidopsis thaliana hypocotyls. The Plant Journal. 98(6), 1048–1059. mla: Rakusová, Hana, et al. “Genetic Screen for Factors Mediating PIN Polarization in Gravistimulated Arabidopsis Thaliana Hypocotyls.” The Plant Journal, vol. 98, no. 6, Wiley, 2019, pp. 1048–59, doi:10.1111/tpj.14301. short: H. Rakusová, H. Han, P. Valošek, J. Friml, The Plant Journal 98 (2019) 1048–1059. date_created: 2019-04-09T08:46:44Z date_published: 2019-06-01T00:00:00Z date_updated: 2023-08-25T10:11:03Z day: '01' ddc: - '580' department: - _id: JiFr doi: 10.1111/tpj.14301 ec_funded: 1 external_id: isi: - '000473644100008' pmid: - '30821050' file: - access_level: open_access checksum: ad3b5e270b67ba2a45f894ce3be27920 content_type: application/pdf creator: dernst date_created: 2019-04-15T09:38:43Z date_updated: 2020-07-14T12:47:25Z file_id: '6304' file_name: 2019_PlantJournal_Rakusov.pdf file_size: 1383100 relation: main_file file_date_updated: 2020-07-14T12:47:25Z has_accepted_license: '1' intvolume: ' 98' isi: 1 issue: '6' language: - iso: eng license: https://creativecommons.org/licenses/by/4.0/ month: '06' oa: 1 oa_version: Published Version page: 1048-1059 pmid: 1 project: - _id: 25716A02-B435-11E9-9278-68D0E5697425 call_identifier: FP7 grant_number: '282300' name: Polarity and subcellular dynamics in plants publication: The Plant Journal publication_identifier: eissn: - 1365-313x issn: - 0960-7412 publication_status: published publisher: Wiley quality_controlled: '1' scopus_import: '1' status: public title: Genetic screen for factors mediating PIN polarization in gravistimulated Arabidopsis thaliana hypocotyls tmp: image: /images/cc_by.png legal_code_url: https://creativecommons.org/licenses/by/4.0/legalcode name: Creative Commons Attribution 4.0 International Public License (CC-BY 4.0) short: CC BY (4.0) type: journal_article user_id: 4359f0d1-fa6c-11eb-b949-802e58b17ae8 volume: 98 year: '2019' ...