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ELONGATED HYPOCOTYL 5a modulates FLOWERING LOCUS T2 and gibberellin levels to control dormancy and bud break in poplar.
Gao, Yongfeng; Chen, Zihao; Feng, Qian; Long, Tao; Ding, Jihua; Shu, Peng; Deng, Heng; Yu, Peizhi; Tan, Wenrong; Liu, Siqin; Rodriguez, Lucas Gutierrez; Wang, Lijun; Resco de Dios, Víctor; Yao, Yinan.
Afiliación
  • Gao Y; School of Life Science and Engineering, Southwest University of Science and Technology, 621010 Mianyang, China.
  • Chen Z; School of Life Science and Engineering, Southwest University of Science and Technology, 621010 Mianyang, China.
  • Feng Q; School of Life Science and Engineering, Southwest University of Science and Technology, 621010 Mianyang, China.
  • Long T; School of Life Science and Engineering, Southwest University of Science and Technology, 621010 Mianyang, China.
  • Ding J; College of Horticulture and Forestry, Huazhong Agricultural University, 430070 Wuhan, China.
  • Shu P; Clinical Medical Research Center, Xinqiao Hospital, Army Medical University, 400037 Chongqing, China.
  • Deng H; School of Life Science and Engineering, Southwest University of Science and Technology, 621010 Mianyang, China.
  • Yu P; School of Life Science and Engineering, Southwest University of Science and Technology, 621010 Mianyang, China.
  • Tan W; School of Life Science and Engineering, Southwest University of Science and Technology, 621010 Mianyang, China.
  • Liu S; School of Life Science and Engineering, Southwest University of Science and Technology, 621010 Mianyang, China.
  • Rodriguez LG; School of Life Science and Engineering, Southwest University of Science and Technology, 621010 Mianyang, China.
  • Wang L; School of Life Science and Engineering, Southwest University of Science and Technology, 621010 Mianyang, China.
  • Resco de Dios V; School of Life Science and Engineering, Southwest University of Science and Technology, 621010 Mianyang, China.
  • Yao Y; School of Life Science and Engineering, Southwest University of Science and Technology, 621010 Mianyang, China.
Plant Cell ; 36(5): 1963-1984, 2024 May 01.
Article en En | MEDLINE | ID: mdl-38271284
ABSTRACT
Photoperiod is a crucial environmental cue for phenological responses, including growth cessation and winter dormancy in perennial woody plants. Two regulatory modules within the photoperiod pathway explain bud dormancy induction in poplar (Populus spp.) the circadian oscillator LATE ELONGATED HYPOCOTYL 2 (LHY2) and GIGANTEA-like genes (GIs) both regulate the key target for winter dormancy induction FLOWERING LOCUS T2 (FT2). However, modification of LHY2 and GIs cannot completely prevent growth cessation and bud set under short-day (SD) conditions, indicating that additional regulatory modules are likely involved. We identified PtoHY5a, an orthologs of the photomorphogenesis regulatory factor ELONGATED HYPOCOTYL 5 (HY5) in poplar (Populus tomentosa), that directly activates PtoFT2 expression and represses the circadian oscillation of LHY2, indirectly activating PtoFT2 expression. Thus, PtoHY5a suppresses SD-induced growth cessation and bud set. Accordingly, PtoHY5a knockout facilitates dormancy induction. PtoHY5a also inhibits bud-break in poplar by controlling gibberellic acid (GA) levels in apical buds. Additionally, PtoHY5a regulates the photoperiodic control of seasonal growth downstream of phytochrome PHYB2. Thus, PtoHY5a modulates seasonal growth in poplar by regulating the PtoPHYB2-PtoHY5a-PtoFT2 module to determine the onset of winter dormancy, and by fine-tuning GA levels to control bud-break.
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Texto completo: 1 Colección: 01-internacional Base de datos: MEDLINE Asunto principal: Proteínas de Plantas / Fotoperiodo / Regulación de la Expresión Génica de las Plantas / Populus / Latencia en las Plantas / Giberelinas Tipo de estudio: Prognostic_studies Idioma: En Revista: Plant Cell Asunto de la revista: BOTANICA Año: 2024 Tipo del documento: Article País de afiliación: China Pais de publicación: Reino Unido
Texto completo
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Texto completo: 1 Colección: 01-internacional Base de datos: MEDLINE Asunto principal: Proteínas de Plantas / Fotoperiodo / Regulación de la Expresión Génica de las Plantas / Populus / Latencia en las Plantas / Giberelinas Tipo de estudio: Prognostic_studies Idioma: En Revista: Plant Cell Asunto de la revista: BOTANICA Año: 2024 Tipo del documento: Article País de afiliación: China Pais de publicación: Reino Unido