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- Diplazium Megaphyllum (Bak.) Christ, a Rare Fern in Taiwan, Reproduces by Apogamy
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題 名 | Diplazium Megaphyllum (Bak.) Christ, a Rare Fern in Taiwan, Reproduces by Apogamy=臺灣產的一種稀有蕨類植物「大葉雙蓋蕨」行無配生殖 |
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作 者 | 邱文良; 黃曜謀; 謝宗欣; 徐昇圓; | 書刊名 | 臺灣林業科學 |
卷 期 | 21:1 民95.03 |
頁 次 | 頁39-47 |
分類號 | 378.13 |
關鍵詞 | 無配生殖; 染色體; 大葉雙蓋蕨; 配子體; 生殖生物學; 孢子; 幼孢子體; Apogamy; Chromosome; Diplazium megaphyllum; Gametophyte; Reproductive biology; Spore; Young sporophyte; |
語 文 | 英文(English) |
中文摘要 | 本研究觀察臺灣產的一種稀有蕨類植物「大葉雙蓋蕨」的生殖模式、孢子、配子體及幼孢子體的形態。本種為三倍體,染色體數123。每一孢子囊有32顆孢子。孢子發芽為書帶蕨型,配子體發育則為鐵線蕨型,成熟的配子體心型無毛被物。雄性與雌性配子體均可產生,但未發現有兩性配子體;雄性配子體可產生具活力之精子,但雌配子體則發育不全而無法受孕。行無配生殖,孢子體自配子體先端凹陷下方之細胞直接產生;幼孢子體的第一片葉子羽狀具中肋。本研究所用之繁殖方式亦提供區外保育之應用。 |
英文摘要 | The reproductive behavior and morphology of the spores, gametophytes, and juvenile sporophytes of Diplazium megaphyllum, a rare fern in Taiwan, were studied, and the following results were obtained. This species is triploid (2n = 123) and produces 32-spore sporangia. Spore germination and gametophyte development are the Vittaria-type and Adiantum-type, respectively. Adult gametophytes are heart-shaped and naked. Male and female gametophytes appeared in culture, but no hermaphrodites were observed. Antheridia released active sperm, but archegonia did not develop properly and lost their function. Young sporophytes were produced apogamously. They arose directly from cells of the cushion on the ventral surface of gametophytes, behind the notch. The 1st frond of a young sporophyte has a midrib and is pinnate. The methods of propagation used in this study can also be used as reference data for the ex situ conservation of this rare fern. |
本系統中英文摘要資訊取自各篇刊載內容。