[{"abstract":[{"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.","lang":"eng"}],"date_created":"2019-04-09T08:46:44Z","ec_funded":1,"oa_version":"Published Version","publisher":"Wiley","publication":"The Plant Journal","department":[{"_id":"JiFr"}],"title":"Genetic screen for factors mediating PIN polarization in gravistimulated Arabidopsis thaliana hypocotyls","publication_identifier":{"eissn":["1365-313x"],"issn":["0960-7412"]},"citation":{"ama":"Rakusová H, Han H, Valošek P, Friml J. Genetic screen for factors mediating PIN polarization in gravistimulated Arabidopsis thaliana hypocotyls. <i>The Plant Journal</i>. 2019;98(6):1048-1059. doi:<a href=\"https://doi.org/10.1111/tpj.14301\">10.1111/tpj.14301</a>","short":"H. Rakusová, H. Han, P. Valošek, J. Friml, The Plant Journal 98 (2019) 1048–1059.","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.” <i>The Plant Journal</i>, vol. 98, no. 6, Wiley, 2019, pp. 1048–59, doi:<a href=\"https://doi.org/10.1111/tpj.14301\">10.1111/tpj.14301</a>.","chicago":"Rakusová, Hana, Huibin Han, Petr Valošek, and Jiří Friml. “Genetic Screen for Factors Mediating PIN Polarization in Gravistimulated Arabidopsis Thaliana Hypocotyls.” <i>The Plant Journal</i>. Wiley, 2019. <a href=\"https://doi.org/10.1111/tpj.14301\">https://doi.org/10.1111/tpj.14301</a>.","ieee":"H. Rakusová, H. Han, P. Valošek, and J. Friml, “Genetic screen for factors mediating PIN polarization in gravistimulated Arabidopsis thaliana hypocotyls,” <i>The Plant Journal</i>, vol. 98, no. 6. Wiley, pp. 1048–1059, 2019.","apa":"Rakusová, H., Han, H., Valošek, P., &#38; Friml, J. (2019). Genetic screen for factors mediating PIN polarization in gravistimulated Arabidopsis thaliana hypocotyls. <i>The Plant Journal</i>. Wiley. <a href=\"https://doi.org/10.1111/tpj.14301\">https://doi.org/10.1111/tpj.14301</a>"},"issue":"6","article_type":"original","external_id":{"pmid":["30821050"],"isi":["000473644100008"]},"status":"public","oa":1,"has_accepted_license":"1","year":"2019","_id":"6262","user_id":"4359f0d1-fa6c-11eb-b949-802e58b17ae8","type":"journal_article","volume":98,"page":"1048-1059","quality_controlled":"1","scopus_import":"1","article_processing_charge":"Yes (via OA deal)","date_updated":"2025-05-07T11:12:30Z","doi":"10.1111/tpj.14301","author":[{"full_name":"Rakusová, Hana","last_name":"Rakusová","first_name":"Hana"},{"full_name":"Han, Huibin","id":"31435098-F248-11E8-B48F-1D18A9856A87","first_name":"Huibin","last_name":"Han"},{"id":"3CDB6F94-F248-11E8-B48F-1D18A9856A87","full_name":"Valošek, Petr","last_name":"Valošek","first_name":"Petr"},{"id":"4159519E-F248-11E8-B48F-1D18A9856A87","full_name":"Friml, Jiří","last_name":"Friml","orcid":"0000-0002-8302-7596","first_name":"Jiří"}],"date_published":"2019-06-01T00:00:00Z","tmp":{"image":"/images/cc_by.png","short":"CC BY (4.0)","name":"Creative Commons Attribution 4.0 International Public License (CC-BY 4.0)","legal_code_url":"https://creativecommons.org/licenses/by/4.0/legalcode"},"file_date_updated":"2020-07-14T12:47:25Z","month":"06","isi":1,"language":[{"iso":"eng"}],"project":[{"_id":"25716A02-B435-11E9-9278-68D0E5697425","grant_number":"282300","name":"Polarity and subcellular dynamics in plants","call_identifier":"FP7"}],"ddc":["580"],"day":"01","pmid":1,"file":[{"content_type":"application/pdf","date_created":"2019-04-15T09:38:43Z","relation":"main_file","access_level":"open_access","creator":"dernst","file_size":1383100,"file_name":"2019_PlantJournal_Rakusov.pdf","checksum":"ad3b5e270b67ba2a45f894ce3be27920","file_id":"6304","date_updated":"2020-07-14T12:47:25Z"}],"publication_status":"published","intvolume":"        98"}]