Also called "shizui." The female organ of an angiosperm flower, it consists of three parts: the ovary, the style, and the flower head. After pollination, the style and flower head wilt or fall off, but the ovary develops and becomes a fruit. The pistil is made up of carpels that are homologous to the megasporophylls of heterosporous ferns (Selaginella arborescens) and gymnosperms (Cycads), and is a metamorphosed leaf. The pistils of the double-flowered variety of cherry blossom, Fugenzo, have reverted to green leaves. Unlike the megasporophylls of gymnosperms, the edges of the carpels of angiosperms close together to form a pouch that encases the ovules that become seeds. This part is called the ovary. Source: Heibonsha World Encyclopedia, 2nd Edition Information |
〈しずい〉ともいう。被子植物の花の雌性器官で,子房,花柱,花頭の三つの部分からなり,受粉した後,花柱や花頭はしおれたり落ちたりするが,子房は発達して実となる。めしべは,異型胞子性のシダ植物(イワヒバ)や裸子植物(ソテツ)の大胞子葉と相同な心皮carpelからなっていて,葉の変態したものである。サクラの八重咲きの品種である普賢象のめしべは,先祖返りをして緑葉となっている。裸子植物の大胞子葉と異なり,被子植物の心皮はその縁が互いに閉じ合わさって袋状となり,中に種子となる胚珠を包み込んでいて,この部分を子房ovaryという。
出典 株式会社平凡社世界大百科事典 第2版について 情報 |
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