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Loose Plant Architecture1 (LPA1) determines lamina joint bending by suppressing auxin signalling that interacts with C-22-hydroxylated and 6-deoxo brassinosteroids in rice.
Liu, Jing Miao; Park, Soon Ju; Huang, Jin; Lee, Eun Jin; Xuan, Yuan Hu; Je, Byoung Il; Kumar, Vikranth; Priatama, Ryza A; Raj K, Vimal; Kim, Sung Hoon; Min, Myung Ki; Cho, Jun Hyeon; Kim, Tae Ho; Chandran, Anil Kumar Nalini; Jung, Ki Hong; Takatsuto, Suguru; Fujioka, Shozo; Han, Chang-Deok.
Afiliación
  • Liu JM; Division of Applied Life Science (BK21 Program), Plant Molecular Biology and Biotechnology Research Center (PMBBRC), Gyeongsang National University, Jinju 660-701, Republic of Korea.
  • Park SJ; Department of Biological Science, Wonkwang University, Iksan, Jeonbuk 570-749, Republic of Korea.
  • Huang J; Division of Applied Life Science (BK21 Program), Plant Molecular Biology and Biotechnology Research Center (PMBBRC), Gyeongsang National University, Jinju 660-701, Republic of Korea.
  • Lee EJ; Division of Applied Life Science (BK21 Program), Plant Molecular Biology and Biotechnology Research Center (PMBBRC), Gyeongsang National University, Jinju 660-701, Republic of Korea.
  • Xuan YH; College of Plant Protection, Shengyang Agricultural University, Dongling Road 120, Shengyang, China 110866.
  • Je BI; Division of Applied Life Science (BK21 Program), Plant Molecular Biology and Biotechnology Research Center (PMBBRC), Gyeongsang National University, Jinju 660-701, Republic of Korea.
  • Kumar V; Division of Applied Life Science (BK21 Program), Plant Molecular Biology and Biotechnology Research Center (PMBBRC), Gyeongsang National University, Jinju 660-701, Republic of Korea.
  • Priatama RA; Department of Molecular Breeding Division, National Academy of Agricultural Science, RDA, Jeonju, Republic of Korea.
  • Raj K V; Division of Applied Life Science (BK21 Program), Plant Molecular Biology and Biotechnology Research Center (PMBBRC), Gyeongsang National University, Jinju 660-701, Republic of Korea.
  • Kim SH; Division of Applied Life Science (BK21 Program), Plant Molecular Biology and Biotechnology Research Center (PMBBRC), Gyeongsang National University, Jinju 660-701, Republic of Korea.
  • Min MK; Department of Molecular Breeding Division, National Academy of Agricultural Science, RDA, Jeonju, Republic of Korea.
  • Cho JH; Department of Southern Area Crop Science, NICS (National Institute of Crop Science), RDA, 20th Jeompiljaero, Miryang, Gyeongnam 627-803, Republic of Korea.
  • Kim TH; National Academy of Agricultural Science, Rural Development Administration, Suwon, 441-857, Republic of Korea.
  • Chandran AK; Graduate School of Biotechnology & Crop Biotech Institute, Kyung Hee University, Yongin, 446-701, Republic of Korea.
  • Jung KH; Graduate School of Biotechnology & Crop Biotech Institute, Kyung Hee University, Yongin, 446-701, Republic of Korea.
  • Takatsuto S; Department of Chemistry, Joetsu University of Education, Joetsu, Niigata 943-8512 Japan.
  • Fujioka S; RIKEN Center for Sustainable Resource Science, Wako, Saitama 351-0198, Japan.
  • Han CD; Division of Applied Life Science (BK21 Program), Plant Molecular Biology and Biotechnology Research Center (PMBBRC), Gyeongsang National University, Jinju 660-701, Republic of Korea cdhan@gsnu.ac.kr.
J Exp Bot ; 67(6): 1883-95, 2016 Mar.
Article en En | MEDLINE | ID: mdl-26826218
Lamina inclination is a key agronomical character that determines plant architecture and is sensitive to auxin and brassinosteroids (BRs). Loose Plant Architecture1 (LPA1) in rice (Oryza sativa) and its Arabidopsis homologues (SGR5/AtIDD15) have been reported to control plant architecture and auxin homeostasis. This study explores the role of LPA1 in determining lamina inclination in rice. LPA1 acts as a positive regulator to suppress lamina bending. Genetic and biochemical data indicate that LPA1 suppresses the auxin signalling that interacts with C-22-hydroxylated and 6-deoxo BRs, which regulates lamina inclination independently of OsBRI1. Mutant lpa1 plants are hypersensitive to indole-3-acetic acid (IAA) during the lamina inclination response, which is suppressed by the brassinazole (Brz) inhibitor of C-22 hydroxylase involved in BR synthesis. A strong synergic effect is detected between lpa1 and d2 (the defective mutant for catalysis of C-23-hydroxylated BRs) during IAA-mediated lamina inclination. No significant interaction between LPA1 and OsBRI1 was identified. The lpa1 mutant is sensitive to C-22-hydroxylated and 6-deoxo BRs in the d61-1 (rice BRI1 mutant) background. We present evidence verifying that two independent pathways function via either BRs or BRI1 to determine IAA-mediated lamina inclination in rice. RNA sequencing analysis and qRT-PCR indicate that LPA1 influences the expression of three OsPIN genes (OsPIN1a, OsPIN1c and OsPIN3a), which suggests that auxin flux might be an important factor in LPA1-mediated lamina inclination in rice.
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Texto completo: 1 Colección: 01-internacional Base de datos: MEDLINE Asunto principal: Proteínas de Plantas / Oryza / Transducción de Señal / Hojas de la Planta / Brasinoesteroides / Ácidos Indolacéticos Tipo de estudio: Prognostic_studies Idioma: En Revista: J Exp Bot Asunto de la revista: BOTANICA Año: 2016 Tipo del documento: Article 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 / Oryza / Transducción de Señal / Hojas de la Planta / Brasinoesteroides / Ácidos Indolacéticos Tipo de estudio: Prognostic_studies Idioma: En Revista: J Exp Bot Asunto de la revista: BOTANICA Año: 2016 Tipo del documento: Article Pais de publicación: Reino Unido