モトムラ カズキ
元村 一基
MOTOMURA KAZUKI
所属 総合科学技術研究機構
職名 助教
言語種別 日本語
発行・発表の年月 2016/08
形態種別 研究論文(学術雑誌)
査読 査読あり
標題 Fertilization-independent Cell-fusion between the Synergid and Central Cell in the Polycomb Mutant.
執筆形態 共著
掲載誌名 Cell structure and function
掲載区分 国外
巻・号・頁 41(2),121-5
著者・共著者 Motomura Kazuki, Berger Frédéric, Kawashima Tomokazu, Kinoshita Tetsu, Higashiyama Tetsuya, Maruyama Daisuke
概要 In flowering plants, fertilization of the central cell gives rise to an embryo-nourishing endosperm. Recently, we reported that the endosperm absorbs the adjacent synergid cell through a cell-fusion, terminating the pollen tube guidance by a rapid inactivation of the synergid cell. Although this synergid-endosperm fusion (SE fusion) initiates soon after fertilization, it was still unknown whether the triggers of SE fusion are stimuli during fertilization or other seed developmental processes. To further dissect out the SE fusion process, we investigated the SE fusion in an Arabidopsis mutant defective for MULTICOPY SUPPRESSOR OF IRA1 (MSI1), a subunit of the polycomb repressive complex 2 (PRC2). The mutant msi1 develops autonomous endosperm without fertilization. Time-lapse imaging revealed a rapid efflux of the synergid contents during the autonomous endosperm development, indicating that the initiation of SE fusion is under the control of some of the events triggered by fertilization of the central cell distinct from the discharge of pollen tube contents and plasma membrane fusion.
DOI 10.1247/csf.16010
ISSNコード 1347-3700
PMID 27374417