アラビドプシスの先端部位受容体は花粉管の成長とLUREセンシングを制御する
Hidenori Takeuchi1,2, Tetsuya Higashiyama1,2,3
1Division of Biological Science, Graduate School of Science, Nagoya University, Furo-cho, Chikusa-ku, Nagoya, Aichi 464-8602, Japan.
Nature
|March 11, 2016
まとめ
花粉管の成長は 雌性アトラクタによって導かれます 研究者らは,花粉特異性受容体のようなキナーゼ6 (PRK6) がLURE1ペプチドを感知し,花粉管の成長を植物繁殖のための卵子へと誘導することを発見した.
科学分野:
- 植物の繁殖
- セル・シグナル
- 分子生物学
背景:
- 細胞の成長方向性は 組織組織化とコミュニケーションに不可欠です
- 花を咲かせる植物では 花粉管の成長は 雌の信号によって導かれます
- 雌が分泌するペプチドは 花粉管に種特有の吸引物質として作用する.
研究 の 目的:
- 雌性吸引物質を感知し 花粉管の成長を誘導する受容体を特定する
- 種特有の誘導信号に対する花粉管の反応のメカニズムを明らかにする.
主な方法:
- アラビドプシス・タリアナのセミ・イン・ビボ実験
- 花粉特異性受容体類似キナーゼ6 (PRK6) の遺伝子解析
- PRK6 と ROPGEF と ROP1 GTPase の相互作用に関する研究
主要な成果:
- PRK6は,LURE1アトラクタントペプチドと卵子標的を感知するために不可欠です.
- PRK6はROPGEFsと相互作用し,花粉管の成長のためにROP1GTPaseを活性化します.
- PRK6は関連種のAtLURE1に反応し,他のPRK受容体と協力する.
- PRK6は,花粉管の方向転換の前に,AtLURE1に向かって非対称に蓄積する.
結論:
- PRK6はAtLURE1アトラクタンの重要な膜受容体として機能する.
- PRK6は,ROPシグナリングタンパク質を含む,尖端成長機構を動員する.
- この研究は多種受容体による 花粉管の成長のオーケストレーションと 種特有の引き寄せの洞察を示しています
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