實驗花的構(gòu)造ppt課件-wenkub
2023-05-18 22:07:23 本頁面
【正文】 雌蕊群 Gynoecium 花柄和花托 下位花 周位花 上位花 花被 花萼 Calyx 花冠 Corolla 萼片 ：由薄壁組織、維管系統(tǒng)及表皮層組成 Sepal 表皮層上有氣孔和表皮毛 花瓣 ： 由薄壁組織、維管系統(tǒng)及表皮層組成 Petal 表皮層細(xì)胞的垂周壁呈波紋狀或內(nèi)脊， 表皮層上有氣孔和表皮毛 薄壁組織中可含有一些異細(xì)胞，成熟 花瓣中 有有色體或細(xì)胞液中有花青素 雄蕊群 花藥 Anther 花絲 Filament 雌蕊群 子房 Ovary 花柱 Style 柱頭 Stigma 基本單位是心皮 Carpel Parts of a lily (Lilium henryi) flower. (a) An intact flower. In some flowers, such as lilies, the sepals and petals are similar to one another, and the perianth parts may then be referred to as tepals. Note that the sepals are attached to the receptacle below the petals. (b) A partly dissected flower with two tepals and two stamens removed to reveal the ovary. The gynoecium consists of the ovary, style, and stigma. The stamen consists of the filament and anther. Note that the sepals, petals, and stamens are attached to the receptacle below the ovary, which is made up, in the lily flower, of three fused carpels. Such a flower is said to be hypogynous. The wall of the pollen grain serves to protect the male gametophyte on its often lIozardous journey between the anther and the sti
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