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題 名 | Embryology of Adenosma Bilabiatum (Roxb.) Merr. (=A. Capitatum Benth.) (Scrophulariaceae)=Adenosma bilabiatum (Roxb.) Merr.(玄參科)的胚胎學 |
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作 者 | Urs, H. G. V. G.; Jayaraj, M.; Jayaraj, M.; Urs, H. G. V. G.; | 書刊名 | Taiwania |
卷 期 | 44:3 1999.09[民88.09] |
頁 次 | 頁355-367 |
分類號 | 373.81 |
關鍵詞 | 胚胎學; 玄參科; Embryology; Adenosma bilabiatum; Scrophulariaceae; |
語 文 | 英文(English) |
DOI | 10.6165/tai.1999.44(3).355 |
中文摘要 | 花藥為四孢子型。花藥壁之發育為雙子葉型。 分泌型營養層為單層細胞且為雙 重起源。四分小孢子為四分錐形體。花藥開裂時花粉粒為二細胞期且具三個萌芽孔。胚珠為 單層珠被,薄珠心,倒生胚珠型。雌配子體的發育為蓼型。受精作用是經由珠孔。胚乳是細胞 型具單細胞合點端吸器,而珠孔端吸器起源時為四細胞,但由於吸器細胞之細胞壁的瓦解而成 為具四核之單細胞。胚胎發育為柳葉菜型。種皮薄具一明顯表皮層。 |
英文摘要 | Anthers are tetrasporangiate. Anther wall development is of the dicotyledonous type. The glandular tapetum is single-layered and exhibits dual origin. Microspore tetrads are tetrahedral. Pollen grains at the time of anther dehiscence are two-celled and triaperturate. Ovules are unitegmic, tenuinucellar and anatropous. Development of female gametophyte conforms to the Polygonum type. Fertilization is porogamous. Endosperm is celluar with a single-celled chalazal haustorium, while the micropylar haustorium is initially four-celled, but becomes single-celled and quadrinucleate by the breakdown of the walls of the haustorial cells. Embryo development conforms to Onagrad type. Seed coat is thin with a prominent epidermal layer. |
本系統中英文摘要資訊取自各篇刊載內容。