<b>カーペル決定経路の制御は, </b>キュキュルビットの性別決定につながります</b>

Siqi Zhang¹, Feng-Quan Tan¹, Ching-Hui Chung¹

¹Université Paris-Saclay, CNRS, INRAE, Université Evry, Institute of Plant Sciences Paris-Saclay (IPS2); 91190 Gif sur Yvette, France.

Science (New York, N.Y.)

|November 15, 2022

まとめ

研究者達は,メロンの雌の花の発達の鍵となるのが,カーペル同一性遺伝子 CRABS CLAW (CRC) であると特定した. この発見は単性花の進化に光を当て植物育成の進歩の可能性を提供しています

科学分野:

植物生物学
遺伝学
進化生物学

背景:

単性的な花はヘルマフロディット祖先から進化したので植物育種には性別決定が不可欠である.
花の性別を制御することは農業開発の重要な目標です

研究の目的:

メロンの花の性別決定の基礎にある遺伝的メカニズムを調査する.
ヘルマフロディット性からユニセックス性への移行に関与する遺伝子を特定する.

主な方法:

メロンの女性から男性への性転換変異体の分離
CRABS CLAW (CRC) として原因遺伝子の識別
WIP1,TOPLESSとCRCプロモーターの相互作用の分析

主要な成果:

カーペル同一性遺伝子CRABS CLAW (CRC) は,女性から男性への性転換変異における因果遺伝子として特定された.
転写因子WIP1はコアプレッサーTOPLESSを誘導し,ヒストンの脱酸化によってCRC発現を抑制する.
TOPLESS-WIP1の相互作用を妨害すると,CRCの発現が可能になり,雌の花の発達につながります.

結論:

カルペル同一性遺伝子CRCを抑制するマスターレギュレータWIP1が,カルペル同一性遺伝子の性決定に関与する.
単性的な花の進化には,花のメリステム機能に干渉する性遺伝子が含まれる可能性があります.
このメカニズムを理解することで花の発達や植物育種における潜在的な応用について洞察を得ることができます

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