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Dormancy regulator Prunus mume DAM6 promotes ethylene-mediated leaf senescence and abscission.
Hsiang, Tzu-Fan; Chen, Yue-Yu; Nakano, Ryohei; Oikawa, Akira; Matsuura, Takakazu; Ikeda, Yoko; Yamane, Hisayo.
Afiliación
  • Hsiang TF; Graduate School of Agriculture, Kyoto University, Kyoto, 606-8502, Japan.
  • Chen YY; Graduate School of Agriculture, Kyoto University, Kyoto, 606-8502, Japan.
  • Nakano R; Experimental Farm, Graduate School of Agriculture, Kyoto University, Kyoto, 619-0812, Japan.
  • Oikawa A; Graduate School of Agriculture, Kyoto University, Kyoto, 606-8502, Japan.
  • Matsuura T; Institute of Plant Science and Resources, Okayama University, Kurashiki, 710-0046, Japan.
  • Ikeda Y; Institute of Plant Science and Resources, Okayama University, Kurashiki, 710-0046, Japan.
  • Yamane H; Graduate School of Agriculture, Kyoto University, Kyoto, 606-8502, Japan. yamane.hisayo.6n@kyoto-u.ac.jp.
Plant Mol Biol ; 114(5): 99, 2024 Sep 16.
Article en En | MEDLINE | ID: mdl-39285107
ABSTRACT
Leaf senescence and abscission in autumn are critical phenological events in deciduous woody perennials. After leaf fall, dormant buds remain on deciduous woody perennials, which then enter a winter dormancy phase. Thus, leaf fall is widely believed to be linked to the onset of dormancy. In Rosaceae fruit trees, DORMANCY-ASSOCIATED MADS-box (DAM) transcription factors control bud dormancy. However, apart from their regulatory effects on bud dormancy, the biological functions of DAMs have not been thoroughly characterized. In this study, we revealed a novel DAM function influencing leaf senescence and abscission in autumn. In Prunus mume, PmDAM6 expression was gradually up-regulated in leaves during autumn toward leaf fall. Our comparative transcriptome analysis using two RNA-seq datasets for the leaves of transgenic plants overexpressing PmDAM6 and peach (Prunus persica) DAM6 (PpeDAM6) indicated Prunus DAM6 may up-regulate the expression of genes involved in ethylene biosynthesis and signaling as well as leaf abscission. Significant increases in 1-aminocyclopropane-1-carboxylate accumulation and ethylene emission in DEX-treated 35SPmDAM6-GR leaves reflect the inductive effect of PmDAM6 on ethylene biosynthesis. Additionally, ethephon treatments promoted autumn leaf senescence and abscission in apple and P. mume, mirroring the changes due to PmDAM6 overexpression. Collectively, these findings suggest that PmDAM6 may induce ethylene emission from leaves, thereby promoting leaf senescence and abscission. This study clarified the effects of Prunus DAM6 on autumn leaf fall, which is associated with bud dormancy onset. Accordingly, in Rosaceae, DAMs may play multiple important roles affecting whole plant growth during the tree dormancy induction phase.
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Texto completo: 1 Colección: 01-internacional Base de datos: MEDLINE Asunto principal: Proteínas de Plantas / Hojas de la Planta / Regulación de la Expresión Génica de las Plantas / Prunus / Etilenos Idioma: En Revista: Plant Mol Biol Asunto de la revista: BIOLOGIA MOLECULAR / BOTANICA Año: 2024 Tipo del documento: Article País de afiliación: Japón Pais de publicación: Países Bajos
Texto completo
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Texto completo: 1 Colección: 01-internacional Base de datos: MEDLINE Asunto principal: Proteínas de Plantas / Hojas de la Planta / Regulación de la Expresión Génica de las Plantas / Prunus / Etilenos Idioma: En Revista: Plant Mol Biol Asunto de la revista: BIOLOGIA MOLECULAR / BOTANICA Año: 2024 Tipo del documento: Article País de afiliación: Japón Pais de publicación: Países Bajos