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In the course of evolution, plants have developed mechanisms that orient their organs toward the incoming light. At the seedling stage, positive phototropism is mainly regulated by phototropin photoreceptors in blue and UV wavelengths. Contrasting with this, we report that UV RESISTANCE LOCUS8 (UVR8) serves as the predominant photoreceptor of UVB– induced phototropic responses in Arabidopsis (Arabidopsis thaliana) inflorescence stems. We examined the
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dc.contributor.author | Vanhaelewyn, Lucas | |
dc.contributor.author | Viczián, András | |
dc.contributor.author | Prinsen, Els | |
dc.contributor.author | Bernula, Péter | |
dc.contributor.author | Serrano, Alejandro Miguel | |
dc.contributor.author | Arana, María Veronica | |
dc.contributor.author | Ballaré, Carlos Luis | |
dc.contributor.author | Nagy, Ferenc | |
dc.contributor.author | Van Der Straeten, Dominique | |
dc.contributor.author | Vandenbussche, Filip | |
dc.date.accessioned | 2020-04-22T18:37:31Z | |
dc.date.available | 2020-04-22T18:37:31Z | |
dc.date.issued | 2019-09 | |
dc.identifier.issn | 1040-4651 | |
dc.identifier.issn | 1532-298X | |
dc.identifier.other | https://doi.org/10.1105/tpc.18.00929 | |
dc.identifier.uri | http://hdl.handle.net/20.500.12123/7126 | |
dc.identifier.uri | http://www.plantcell.org/content/31/9/2070 | |
dc.description.abstract | In the course of evolution, plants have developed mechanisms that orient their organs toward the incoming light. At the seedling stage, positive phototropism is mainly regulated by phototropin photoreceptors in blue and UV wavelengths. Contrasting with this, we report that UV RESISTANCE LOCUS8 (UVR8) serves as the predominant photoreceptor of UVB– induced phototropic responses in Arabidopsis (Arabidopsis thaliana) inflorescence stems. We examined the molecular mechanisms underlying this response and our findings support the Blaauw theory (Blaauw, 1919), suggesting rapid differential growth through unilateral photomorphogenic growth inhibition. UVR8-dependent UV-B light perception occurs mainly in the epidermis and cortex, but deeper tissues such as endodermis can also contribute. Within stems, a spatial difference of UVR8 signal causes a transcript and protein increase of transcription factors ELONGATED HYPOCOTYL5 (HY5) and its homolog HY5 HOMOLOG at the UV-B–exposed side. The irradiated side shows (1) strong activation of flavonoid synthesis genes and flavonoid accumulation; (2) increased gibberellin (GA)2-oxidase expression, diminished GA1 levels, and accumulation of the DELLA protein REPRESSOR OF GA1; and (3) increased expression of the auxin transport regulator PINOID, contributing to diminished auxin signaling. Together, the data suggest a mechanism of phototropin-independent inflorescence phototropism through multiple, locally UVR8-regulated hormone pathways . | es_AR |
dc.format | application/pdf | es_AR |
dc.language.iso | eng | es_AR |
dc.publisher | The American Society of Plant Biologists | es_AR |
dc.rights | info:eu-repo/semantics/restrictedAccess | es_AR |
dc.source | The Plant Cell 31: 2070–2088 (Septiembre 2019) | es_AR |
dc.subject | Fisiología Vegetal | es_AR |
dc.subject | Plant Physiology | eng |
dc.subject | Fototropismo | es_AR |
dc.subject | Phototropism | eng |
dc.subject | Arabidopsis Thaliana | es_AR |
dc.subject | Fotorreceptores | es_AR |
dc.subject | Photoreceptors | eng |
dc.subject.other | UVR8 | es_AR |
dc.title | Differential UVR8 Signal across the Stem Controls UV-B–Induced Inflorescence Phototropism | es_AR |
dc.type | info:ar-repo/semantics/artículo | es_AR |
dc.type | info:eu-repo/semantics/article | es_AR |
dc.type | info:eu-repo/semantics/publishedVersion | es_AR |
dc.description.origen | Estación Experimental Agropecuaria Bariloche | es_AR |
dc.description.fil | Fil: Vanhaelewyn, Lucas. Ghent University. Faculty of Sciences. Department of Biology. Laboratory of Functional Plant Biology; Bélgica | es_AR |
dc.description.fil | Fil: Viczián, András. Institute of Plant Biology. Biological Research Centre; Hungría | es_AR |
dc.description.fil | Fil: Prinsen, Els. University of Antwerp. Department of Biology; Bélgica | es_AR |
dc.description.fil | Fil: Bernula, Péter. Institute of Plant Biology. Biological Research Centre. University of Szeged. Faculty of Science and Informatics; Hungría | es_AR |
dc.description.fil | Fil: Serrano, Alejandro Miguel. Consejo Nacional de Investigaciones Cientificas y Tecnicas. Instituto Argentino de Investigaciones de Zonas Aridas (IADIZA); Argentina | es_AR |
dc.description.fil | Fil: Arana, María Veronica. Instituto Nacional de Tecnología Agropecuaria (INTA). Estación Experimental Agropecuaria Bariloche. Consejo Nacional de Investigaciones Cientificas y Tecnicas. Instituto de Investigaciones Forestales y Agropecuarias Bariloche; Argentina | es_AR |
dc.description.fil | Fil: Ballaré, Carlos Luis. Universidad Nacional de Buenos Aires. Facultad de Agronomía. Instituto de Investigaciones Fisiologicas y Ecologicas Vinculadas a la Agricultura (IFEVA); Argentina | es_AR |
dc.description.fil | Fil: Nagy, Ferenc. Institute of Plant Biology. Biological Research Centre; Hungría | es_AR |
dc.description.fil | Fil: Van Der Straeten, Dominique. Ghent University. Faculty of Sciences. Department of Biology. Laboratory of Functional Plant Biology; Bélgica | es_AR |
dc.description.fil | Fil: Vandenbussche, Filip. Ghent University. Faculty of Sciences. Department of Biology. Laboratory of Functional Plant Biology; Bélgica | es_AR |
dc.subtype | cientifico |
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