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| Open AccessCoordinated regulation of vegetative phase change by brassinosteroids and the age pathway in Arabidopsis
Zhou et al. reveal a novel role for brassinosteroids in regulation of vegetative phase change in Arabidopsis. Brassinosteroids regulate this process by simultaneously stabilizing SPL9 and TOE1 through the BIN2-mediated phosphorylation process.
- Bingying Zhou
- , Qing Luo
- & Gang Wu
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| Open AccessIntegrated omics networks reveal the temporal signaling events of brassinosteroid response in Arabidopsis
Brassinosteroids (BR) regulate plant development and stress responses. Here, by integrating multiple omics datasets and inferring networks, the authors profile BR signaling in Arabidopsis and characterize BRONTOSAURUS, a BR-regulated transcription factor that impacts cell division in roots.
- Natalie M. Clark
- , Trevor M. Nolan
- & Justin W. Walley
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Article
| Open AccessThe membrane-localized protein kinase MAP4K4/TOT3 regulates thermomorphogenesis
Plants respond to warmth via growth processes termed thermomorphogenesis. Here, via a phosphoproteomics approach, the authors show that the mitogen activated protein kinase TOT3 regulates thermomorphogenesis in both wheat and Arabidopsis and modifies brassinosteroid signaling in Arabidopsis.
- Lam Dai Vu
- , Xiangyu Xu
- & Ive De Smet
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Article
| Open AccessModulation of BIN2 kinase activity by HY5 controls hypocotyl elongation in the light
HY5 is a bZIP transcription factor and master regulator of photomorphogenesis in plants. Here, the authors show that in addition to regulating transcription, HY5 promotes the activity of the GSK3-like kinase BIN2 thus negatively regulating hypocotyl elongation by suppressing brassinosteroid signaling.
- Jian Li
- , William Terzaghi
- & Xing Wang Deng
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Article
| Open AccessBES1 is activated by EMS1-TPD1-SERK1/2-mediated signaling to control tapetum development in Arabidopsis thaliana
BES1 and BZR1 transcription factors are activated by the BRI1-BAK1 receptor complex during brassinosteroid signaling. Here the authors show that BES1-family members also act in anthers, downstream of another receptor-like kinase-mediated signaling pathway, EMS1-TPD1-SERK1/2, to promote tapetum development.
- Weiyue Chen
- , Minghui Lv
- & Jia Li
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| Open AccessEMS1 and BRI1 control separate biological processes via extracellular domain diversity and intracellular domain conservation
EMS1 is a receptor-like kinase that recognizes the peptide ligand TPD1 to specify tapeta in Arabidopsis. Here, via a reciprocal complementation approach, the authors provide evidence that intracellular signaling by EMS1 is interchangeable with that of the brassinosteroid receptor BRI1.
- Bowen Zheng
- , Qunwei Bai
- & Guang Wu
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Article
| Open AccessPAWH1 and PAWH2 are plant-specific components of an Arabidopsis endoplasmic reticulum-associated degradation complex
Endoplasmic reticulum (ER)-associated degradation (ERAD) removes misfolded proteins from the secretory pathway. Here the authors identify two plant-specific proteins in Arabidopsis, PAWH1 and PAWH2, that bind to and stabilise the ER-anchored ubiquitin ligase Hrd1.
- Liangguang Lin
- , Congcong Zhang
- & Jianming Li
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| Open AccessNatural variation of BSK3 tunes brassinosteroid signaling to regulate root foraging under low nitrogen
Plant roots elongate under mild nitrogen deficiency as part of a foraging response that facilitates nutrient uptake. Here the authors show that natural variation in this response among Arabidopsis accessions depends on the brassinosteroid (BR) signaling kinase BSK3, which can enhance BR sensitivity and root growth.
- Zhongtao Jia
- , Ricardo F. H. Giehl
- & Nicolaus von Wirén
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Article
| Open AccessOverexpression of the vascular brassinosteroid receptor BRL3 confers drought resistance without penalizing plant growth
Drought resistant plants typically have reduced growth. Here the authors show that overexpression of the BRL3 brassinosteroid receptor confers drought tolerance and accumulation of osmoprotectant metabolites without penalizing growth, demonstrating that drought response and growth can be uncoupled.
- Norma Fàbregas
- , Fidel Lozano-Elena
- & Ana I. Caño-Delgado
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| Open AccessNatural selection of a GSK3 determines rice mesocotyl domestication by coordinating strigolactone and brassinosteroid signaling
Long mesocotyl is a critical trait for the application of rice deep direct seeding or mechanized dry seeding cultivation method. Here, Sun et al. find OsGSK2 is selected for mesocotyl length variation during domestication and it coordinates strigolactone and brassinosteroid signaling to determine mesocotyl elongation.
- Shiyong Sun
- , Tao Wang
- & Xuelu Wang
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Article
| Open AccessHydrogen peroxide positively regulates brassinosteroid signaling through oxidation of the BRASSINAZOLE-RESISTANT1 transcription factor
Hydrogen peroxide and brassinosteroids (BR) both regulate plant development and stress responses. Here Tian et al. show that hydrogen peroxide can trigger oxidation of the BR-responsive BZR1 transcription factor and promote its transcriptional activity, thereby linking BR and redox signaling.
- Yanchen Tian
- , Min Fan
- & Ming-Yi Bai
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Article
| Open AccessBrassinosteroid signaling-dependent root responses to prolonged elevated ambient temperature
Moderate heat stimulates the growth of Arabidopsis shoots in an auxin-dependent manner. Here, Martins et al. show that elevated ambient temperature modifies root growth by reducing the BRI1 brassinosteroid-receptor protein level and downregulating brassinosteroid signaling.
- Sara Martins
- , Alvaro Montiel-Jorda
- & Grégory Vert
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Article
| Open AccessRD26 mediates crosstalk between drought and brassinosteroid signalling pathways
Brassinosteroid (BR) signalling regulates plant development via the BES1/BZR1 family of transcription factors. Here the authors show that BES1 activity can be modified by the drought-responsive RD26 transcription factor providing a molecular basis for the interaction between drought and BR signalling.
- Huaxun Ye
- , Sanzhen Liu
- & Yanhai Yin
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Interplay between phosphorylation and SUMOylation events determines CESTA protein fate in brassinosteroid signalling
Brassinosteroid hormones control plant growth by regulating phosphorylation of a family of transcription factors. Here Khan et al.find that the stability and nuclear localization of the brassinosteroid-sensitive transcription factor CESTA is regulated by antagonistic SUMOylation and phosphorylation.
- Mamoona Khan
- , Wilfried Rozhon
- & Brigitte Poppenberger