メカノセンシティブチャネルMSL8は花粉の水分化と発芽の間にオスモティック力を調節する
Eric S Hamilton1, Gregory S Jensen1, Grigory Maksaev1
1Department of Biology, Washington University in Saint Louis, Saint Louis, MO 63130, USA.
Science (New York, N.Y.)
|October 24, 2015
まとめ
科学者は花粉特有のイオンチャネル MSL8を発見しました 男性の生育に不可欠です MscS-like 8 (MSL8) と呼ばれるこの機械感知チャネルは,膜の張りを感知することで,水分化と発芽の間に花粉を保護する.
科学分野:
- 植物生物学
- 細胞生物学
- イオンチャネル機能
背景:
- 花粉の粒は,オスのゲメットの配分中に,水力の大きな変化を経験します.
- これらの変化による機械的ストレスは,機械的に敏感なイオンチャネルによって感知され得る.
- 花粉の水分と発芽を理解することは 植物の繁殖の鍵です
研究 の 目的:
- 花粉の機敏イオンチャネルを特定し,特徴づけること.
- 花粉の水分化,発芽,男性の生育におけるこれらのチャネルの役割を調査する.
- ユカリオットにおける MscS ホモログの進化的起源と機能を調査する.
主な方法:
- 花粉特有の遺伝子の識別と特徴付け
- 花粉のMscS型8 (MSL8) イオンチャネルの機能分析
- 低酸素ショック下での花粉の生存を評価する.
- 花粉の発芽とチューブ成長の評価
- 発芽中の細胞の整合性を調べる
主要な成果:
- MSL8は花粉特有の膜張力ゲートイオンチャネルが特定されました.
- MSL8は,低酸素ショック時の花粉の生存と,完全な男性生殖能力のために不可欠です.
- MSL8は花粉の発芽を否定的に制御するが,細胞の完全性には必要である.
- MSL8は花粉の水分と発芽の間に膜の緊張の変化を感知し,それに反応する.
結論:
- MSL8は花粉における重要なメカノセンサとして機能し,水分と発芽のストレスに反応する.
- バクテリアのMscSチャネルのホモログは,様々な真核環境で機械感知する役割に適応されています.
- MSL8は,細胞の完全性を確保しながら,発芽を調節する二重の役割を果たします.
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