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研究生:李沛軒
研究生(外文):Pei-hsuan Lee
論文名稱:鬼桫欏配子體與繁殖生物學之研究
論文名稱(外文):The gametophytes and reproductive biology of Cyathea podophylla (Hook.) Copel.
指導教授:應紹舜應紹舜引用關係
指導教授(外文):Shao-shun Ying
學位類別:碩士
校院名稱:國立臺灣大學
系所名稱:森林學研究所
學門:農業科學學門
學類:林業學類
論文種類:學術論文
論文出版年:1999
畢業學年度:87
語文別:中文
論文頁數:45
中文關鍵詞:配子體幼孢子體配育系統繁殖生物學配子囊個體發生
外文關鍵詞:gametophytejuvenile sporophytemating systemreproductive biologysequence of ontogeny of gametangia
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本研究目的是在於了解鬼桫欏的孢子、配子體、幼孢子體形態與配育系統。其孢子形態是四面體型;孢子撒播11天後發芽,其型式為桫欏型;而配子體發育是鐵線蕨型或槲蕨型。孢子撒播7-8週,藏精器出現於兩翼或近假根處;11-12週,藏卵器出現於凹陷下方。配子囊個體發生是由雄性至兩性。大部分成熟配子體呈現心形,且在凹陷下方具剛毛狀之多細胞毛。培養密度大之雄性配子體數量大於培養密度小之雄性數量。5-8個月後出現無中肋葉片之幼孢子體。由孢子體為二倍體(染色體數2n=138)與高遺傳負荷(96%-100%)之研究結果,可認為鬼桫欏不傾向同配子體自交;而異配子體自交與雜交試驗出現孢子體之比率各是8-25%與42-64%,顯示鬼桫欏傾向異配子體交配之配育系統,尤以異配子體雜交為主。

This research is to study the morphology of spores, gametophytes, and juvenile sporophytes, as well as the mating system of Cyathea podophylla. Spores was tetrahedral with trilete. They began to germinate after 11 days of sowing. The spore germination pattern is of Cyathea type, and the development of gametophytes is the Adiantum or Drynaria type. Antheridia were borne in wings or rhizoid areas by 7-8 weeks and archegonia appeared below the notch by 11-12 weeks. The sequence of ontogeny of the gametangia was from male to hermaphrodite. The adult gametophytes were generally cordate type and with bristle-like hairs below the notch. There were more male gametophytes in dense population than those in sparse one. Juvenile sporophytes with midribless blades appeared after 5-8 months. The diploid sporophyte (2n = 69II) and the high genetic load (96-100%) were found and could indicate that the C. podophylla don't tend to reproduce by intragametophyte selfing. The sporophyte production ratio through intergametophytic selfing and crossing experiments were 8-25% and 42-64% respectly; and suggest that this species mostly reproduces sporophytes through intergametophytic mating, especially by intergametophytic crossing.

目 錄………………………………………………………………I
表目錄………………………………………………………………II
圖目錄………………………………………………………………III
中文摘要……………………………………………………………IV
英文摘要……………………………………………………………V
壹、前言…………………………………………………………… 1
貳、前人研究……………………………………………………… 3
參、材料與方法……………………………………………………10
肆、結果……………………………………………………………14
伍、討論……………………………………………………………27
陸、結論……………………………………………………………33
柒、參考文獻………………………………………………………34
捌、附錄……………………………………………………………38

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