花びらの発達を制御する遺伝的メカニズムの進化
1Department of Molecular, Cellular and Developmental Biology, Yale University, New Haven, Connecticut 06520-8104, USA.
Nature
|May 21, 1999
まとめ
ABCモデルは,A,B,C遺伝子を用いて花の器官の同一性を説明する. B級遺伝子のAPETALA3 (AP3) とPISTILLATA (PI) が花びらに起する役割は,すべての開花植物に保存されず,モデルの普遍性に異議を唱える.
科学分野:
- 植物分子生物学 植物分子生物学
- 進化的発達生物学 進化的発達生物学
- 遺伝学 遺伝学とは
背景:
- ABCモデルでは,A,B,C遺伝子が,エウディコットの花器官のアイデンティティを決定することを提案しています.
- B級遺伝子のAPETALA3 (AP3) とPISTILLATA (PI) は,高級エウディコットにおける花と茎のアイデンティティに決定的な役割を果たしています.
研究 の 目的:
- 血管芽種における花の器官同一性におけるAP3およびPI遺伝子の機能の保存を調査する.
- 下部エウディコットのサブクラスであるRanunculidaeのAP3とPIのオートログエクスプレッションを分析する.
主な方法:
- AP3とPIのオーソロギーの比較遺伝子発現分析.
- 下部エウディコットのRanunculidae亜種に焦点を当ててください.
主要な成果:
- 幹におけるAP3とPIのオーストログ表現は,Ranunculidaeに保存されています.
- 葉っぱのAP3とPIのオーストロジーの表情パターンは,より高いエウディコットと有意に異なる.
結論:
- B級の臓器同一性遺伝子としてのAP3およびPIの同類体の機能は,血管芽種に普遍的に保たれているわけではない.
- 花の葉の進化と,花の器官のアイデンティティメカニズムの遺伝的制御は,再評価を必要とする.
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