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Establishment of the Embryonic Shoot Meristem Involves Activation of Two Classes of Genes with Opposing Functions for Meristem Activities.
Aida, Mitsuhiro; Tsubakimoto, Yuka; Shimizu, Satoko; Ogisu, Hiroyuki; Kamiya, Masako; Iwamoto, Ryosuke; Takeda, Seiji; Karim, Md Rezaul; Mizutani, Masaharu; Lenhard, Michael; Tasaka, Masao.
Afiliação
  • Aida M; International Research Organization for Advanced Science and Technology (IROAST), Kumamoto University, 2-39-1 Kurokami, Chuo-ku, Kumamoto 860-8555, Japan.
  • Tsubakimoto Y; Graduate School of Biological Sciences, Nara Institute of Science and Technology, 8916-5 Takayama, Nara 630-0192, Japan.
  • Shimizu S; Graduate School of Biological Sciences, Nara Institute of Science and Technology, 8916-5 Takayama, Nara 630-0192, Japan.
  • Ogisu H; Graduate School of Biological Sciences, Nara Institute of Science and Technology, 8916-5 Takayama, Nara 630-0192, Japan.
  • Kamiya M; Graduate School of Biological Sciences, Nara Institute of Science and Technology, 8916-5 Takayama, Nara 630-0192, Japan.
  • Iwamoto R; Graduate School of Biological Sciences, Nara Institute of Science and Technology, 8916-5 Takayama, Nara 630-0192, Japan.
  • Takeda S; Graduate School of Biological Sciences, Nara Institute of Science and Technology, 8916-5 Takayama, Nara 630-0192, Japan.
  • Karim MR; Graduate School of Life and Environmental Sciences, Kyoto Prefectural University, Hangi-cho 1-5, Shimogamo, Sakyo-ku, Kyoto 606-8522, Japan.
  • Mizutani M; Graduate School of Biological Sciences, Nara Institute of Science and Technology, 8916-5 Takayama, Nara 630-0192, Japan.
  • Lenhard M; Department of Horticulture, Bangladesh Agricultural University, Mymensingh 2202, Bangladesh.
  • Tasaka M; Graduate School of Agricultural Science, Kobe University, 1-1 Rokkodai, Nada-ku, Kobe 657-8501, Japan.
Int J Mol Sci ; 21(16)2020 Aug 15.
Article em En | MEDLINE | ID: mdl-32824181
The shoot meristem, a stem-cell-containing tissue initiated during plant embryogenesis, is responsible for continuous shoot organ production in postembryonic development. Although key regulatory factors including KNOX genes are responsible for stem cell maintenance in the shoot meristem, how the onset of such factors is regulated during embryogenesis is elusive. Here, we present evidence that the two KNOX genes STM and KNAT6 together with the two other regulatory genes BLR and LAS are functionally important downstream genes of CUC1 and CUC2, which are a redundant pair of genes that specify the embryonic shoot organ boundary. Combined expression of STM with any of KNAT6, BLR, and LAS can efficiently rescue the defects of shoot meristem formation and/or separation of cotyledons in cuc1cuc2 double mutants. In addition, CUC1 and CUC2 are also required for the activation of KLU, a cytochrome P450-encoding gene known to restrict organ production, and KLU counteracts STM in the promotion of meristem activity, providing a possible balancing mechanism for shoot meristem maintenance. Together, these results establish the roles for CUC1 and CUC2 in coordinating the activation of two classes of genes with opposite effects on shoot meristem activity.
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Texto completo: 1 Coleções: 01-internacional Base de dados: MEDLINE Assunto principal: Meristema / Regulação da Expressão Gênica de Plantas / Regulação da Expressão Gênica no Desenvolvimento Idioma: En Revista: Int J Mol Sci Ano de publicação: 2020 Tipo de documento: Article País de afiliação: Japão

Texto completo: 1 Coleções: 01-internacional Base de dados: MEDLINE Assunto principal: Meristema / Regulação da Expressão Gênica de Plantas / Regulação da Expressão Gênica no Desenvolvimento Idioma: En Revista: Int J Mol Sci Ano de publicação: 2020 Tipo de documento: Article País de afiliação: Japão