Differential UVR8 signal across the stem controls UV-B-induced inflorescence phototropism
| العنوان: | Differential UVR8 signal across the stem controls UV-B-induced inflorescence phototropism |
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| المؤلفون: | Filip Vandenbussche, Els Prinsen, Alejandro Miguel Serrano, Carlos L. Ballaré, Ferenc Nagy, András Viczián, Péter Bernula, Lucas Vanhaelewyn, María Verónica Arana, Dominique Van Der Straeten |
| المصدر: | The plant cell Plant Cell CONICET Digital (CONICET) Consejo Nacional de Investigaciones Científicas y Técnicas instacron:CONICET |
| سنة النشر: | 2019 |
| مصطلحات موضوعية: | 0106 biological sciences, 0301 basic medicine, UVR8, Phototropin, Chromosomal Proteins, Non-Histone, Ultraviolet Rays, Arabidopsis, Plant Science, Protein Serine-Threonine Kinases, 01 natural sciences, UV-B–Induced, purl.org/becyt/ford/1 [https], 03 medical and health sciences, Auxin, Gene Expression Regulation, Plant, Arabidopsis thaliana, Inflorescence, purl.org/becyt/ford/1.6 [https], Phototropism, Biology, Research Articles, chemistry.chemical_classification, Flavonoids, biology, Epidermis (botany), Indoleacetic Acids, Plant Stems, Arabidopsis Proteins, Gene Expression Profiling, food and beverages, Cell Biology, biology.organism_classification, UV, Cell biology, Chemistry, 030104 developmental biology, Basic-Leucine Zipper Transcription Factors, chemistry, Endodermis, Human medicine, 010606 plant biology & botany, Signal Transduction |
| الوصف: | 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. Fil: Vanhaelewyn, Lucas. University of Ghent; Bélgica Fil: Viczián, András. Institute of Plant Biology, Biological Research Centre; Hungría Fil: Prinsen, Els. Universiteit Antwerp; Bélgica Fil: Bernula, Péter. Institute of Plant Biology, Biological Research Centre; Hungría. University of Szeged; Hungría Fil: Serrano, Alejandro Miguel. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Mendoza. Instituto Argentino de Investigaciones de las Zonas Áridas. Provincia de Mendoza. Instituto Argentino de Investigaciones de las Zonas Áridas. Universidad Nacional de Cuyo. Instituto Argentino de Investigaciones de las Zonas Áridas; Argentina Fil: Arana, Maria Veronica. Instituto Nacional de Tecnología Agropecuaria. Centro Regional Patagonia Norte. Estación Experimental Agropecuaria San Carlos de Bariloche. Instituto de Investigaciones Forestales y Agropecuarias Bariloche. - Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Patagonia Norte. Instituto de Investigaciones Forestales y Agropecuarias Bariloche; Argentina Fil: Ballare, Carlos Luis. Consejo Nacional de Investigaciones Científicas y Técnicas. Oficina de Coordinación Administrativa Parque Centenario. Instituto de Investigaciones Fisiológicas y Ecológicas Vinculadas a la Agricultura. Universidad de Buenos Aires. Facultad de Agronomía. Instituto de Investigaciones Fisiológicas y Ecológicas Vinculadas a la Agricultura; Argentina. Universidad Nacional de San Martín. Instituto de Investigaciones Biotecnológicas. - Consejo Nacional de Investigaciones Científicas y Técnicas. Oficina de Coordinación Administrativa Parque Centenario. Instituto de Investigaciones Biotecnológicas; Argentina Fil: Nagy, Ferenc. Institute of Plant Biology, Biological Research Centre; Hungría Fil: Van Der Straeten, Dominique. University of Ghent; Bélgica Fil: Vandenbussche, Filip. University of Ghent; Bélgica |
| وصف الملف: | pdf; application/pdf |
| اللغة: | English |
| تدمد: | 1040-4651 |
| URL الوصول: | https://explore.openaire.eu/search/publication?articleId=doi_dedup___::3dab23ab06260483016f3b451dde80d7 https://hdl.handle.net/10067/1606730151162165141 |
| Rights: | OPEN |
| رقم الانضمام: | edsair.doi.dedup.....3dab23ab06260483016f3b451dde80d7 |
| قاعدة البيانات: | OpenAIRE |
| تدمد: | 10404651 |
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