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タイトル: Overexpression of Prunus DAM6 inhibits growth, represses bud break competency of dormant buds and delays bud outgrowth in apple plants
著者: Yamane, Hisayo  kyouindb  KAKEN_id  orcid https://orcid.org/0000-0002-9044-7863 (unconfirmed)
Wada, Masato
Honda, Chikako
Matsuura, Takakazu
Ikeda, Yoko
Hirayama, Takashi
Osako, Yutaro
Gao-Takai, Mei
Kojima, Mikiko
Sakakibara, Hitoshi
Tao, Ryutaro  kyouindb  KAKEN_id  orcid https://orcid.org/0000-0001-7811-5789 (unconfirmed)
著者名の別形: 山根, 久代
和田, 雅人
本多, 親子
松浦, 恭和
池田, 陽子
平山, 隆志
高居, 恵愛
小嶋, 美紀子
榊原, 均
田尾, 龍太郎
発行日: 9-Apr-2019
出版者: Public Library of Science (PLoS)
誌名: PLOS ONE
巻: 14
号: 4
論文番号: e0214788
抄録: Most deciduous fruit trees cultivated in the temperate zone require a genotype-dependent amounts of chilling exposure for dormancy release and bud break. In Japanese apricot (Prunus mume), DORMANCY-ASSOCIATED MADS-box 6 (PmDAM6) may influence chilling-mediated dormancy release and bud break. In this study, we attempted to elucidate the biological functions of PmDAM6 related to dormancy regulation by analyzing PmDAM6-overexpressing transgenic apple (Malus spp.). We generated 35S:PmDAM6 lines and chemically inducible overexpression lines, 35S:PmDAM6-GR. In both overexpression lines, shoot growth was inhibited and early bud set was observed. In addition, PmDAM6 expression repressed bud break competency during dormancy and delayed bud break. Moreover, PmDAM6 expression increased abscisic acid levels and decreased cytokinins contents during the late dormancy and bud break stages in both 35S:PmDAM6 and 35S:PmDAM6-GR. Our analysis also suggested that abscisic acid levels increased during dormancy but subsequently decreased during dormancy release whereas cytokinins contents increased during the bud break stage in dormant Japanese apricot buds. We previously revealed that PmDAM6 expression is continuously down-regulated during dormancy release toward bud break in Japanese apricot. The PmDAM6 expression pattern was concurrent with a decrease and increase in the abscisic acid and cytokinins contents, respectively, in dormant Japanese apricot buds. Therefore, we hypothesize that PmDAM6 represses the bud break competency during dormancy and bud break stages in Japanese apricot by modulating abscisic acid and cytokinins accumulation in dormant buds.
著作権等: © 2019 Yamane et al. This is an open access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited.
URI: http://hdl.handle.net/2433/250044
DOI(出版社版): 10.1371/journal.pone.0214788
PubMed ID: 30964897
出現コレクション:学術雑誌掲載論文等

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