フラボノール:花の花蜜に紫外線を吸収するピグメント
まとめ
黒い目のスーザン花びらは,紫外線を吸収するフラボノールグルコシドを含んでいる. これらの化合物は,花蜜のガイドを作り,受粉する昆虫が花を移動するのを助けます.
科学分野:
- 植物生化学について
- 化学エコロジー 化学エコロジー
- エントモロジー エントモロジー学
背景:
- 黒い目スーザン (Rudbeckia hirta) の花びらに特定のフラボノールグルコースイドが含まれています.
- これらの化合物は,紫外線 (340-380 nm) の範囲で強いスペクトル吸収を示します.
- ネクタールガイドとして知られる紫外線を吸収する花帯は,受粉者の指向に不可欠です.
研究 の 目的:
- ブラックアイのスーザン・ネクタールガイドで紫外線吸収を起こす化合物を化学的に特定する.
- 授粉者-花の相互作用における紫外線吸収の役割を解釈する.
主な方法:
- 紫外線を吸収する化合物を特定するために,花の抽出物の光譜分析.
- 孤立したフラボノールグルコシドの化学的特徴.
主要な成果:
- 3つのフラボノールグルコシドが特定されました: 6,7-ジメトキシ-3",4",5-トリヒドロキシフラボーン-3-O-グルコシド,パトゥリトリン,クウェルセタゲチン.
- これらの化合物は,花の基に濃縮され,紫外線を吸収する領域を形成します.
- これは,花の花蜜ガイドにおける紫外線吸収に対する最初の化学的説明である.
結論:
- 黒い眼のスーザンのフラボノールグルコースイドは,受粉者の紫外線ネクタルのガイドとして機能します.
- 特定された色素は,昆虫の方向性や餌探しに不可欠な紫外線パターンを区切る.
- フラボノールは,昆虫に見られる紫外線の花のパターンを形成する上で,広く作用している可能性が高い.
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