非レガミノースの植物,パラスポニアのヘモグロビン:窒素固定における遺伝的起源と機能の可能性
Science (New York, N.Y.)
|May 27, 1983
まとめ
研究者は,Parasponiaの根の結節から二次性ヘモグロビンを浄化しました. このヘモグロビンは,レヘモグロビンと同じく,酸素のバッファリングと輸送で機能し,共生的な窒素固定と植物ヘモグロビンの進化に影響を与える可能性があります.
科学分野:
- 植物生物学 植物生物学
- バイオケミストリー バイオケミストリー
- シンビオティック・マイクロバイオロジー
背景:
- ヘモグロビンは多くの生物の酸素輸送に不可欠です.
- レヘモグロビンは,豆類内の共生的な窒素固定でよく特徴付けられています.
- ノンレガミノース植物におけるヘモグロビンの存在は,以前は知られていなかった.
研究 の 目的:
- ノンレギュームのパラスパニアからヘモグロビンを浄化し,特徴づけました.
- シンビオティックな窒素固定におけるパラスパニア血球の機能的役割を調査する.
- 乳糖以外の植物におけるヘモグロビンの進化的影響を調査する.
主な方法:
- Rhizobium誘発のParasponiaの根結節から二次性ヘモグロビンの浄化.
- 酸素解離運動の分析.
- 既知のレヘモグロビンとの比較機能分析.
主要な成果:
- Parasponia.から二次性ヘモグロビンを成功裏に浄化しました.
- 酸素解離率は,酸素のバッファリングと輸送における役割を示唆しています.
- パラスポニアのヘモグロビンは,シンビオティックな窒素固定を促進する可能性がある.
結論:
- ヘモグロビンは,ゴム以外の植物にも存在し,これまでの理解に挑戦しています.
- パラスポニアのヘモグロビンは,共生的な窒素固定に重要な役割を果たす可能性があります.
- この発見は,植物ヘモグロビン遺伝子の進化に関する研究のための新しい道を開く.
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