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題名 | SSU rRNA序列分析與型態鑑定證實Geosiphon pyriforme為繡球菌目的演化祖先成員=Geosiphon pyriforme is Evidenced to be an Ancestral Member of the Glomales by Morphological Identification and SSU rRNA Analysis |
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作者 | 吳羽婷; 王也珍; 顏江河; Wu, Yu-ting; Wang, Yen-zeng; Yen, Chiang-her; |
期刊 | 林業研究季刊 |
出版日期 | 20040600 |
卷期 | 26:2 2004.06[民93.06] |
頁次 | 頁79-91 |
分類號 | 379.1 |
語文 | chi |
關鍵詞 | 孢子型態; 超顯微構造; Geosiphon pyriforme; Glomus; SSU rRNA; Spore morphology; Ultrastructure; |
中文摘要 | 於德國和奧地利天然生育地所發現的多核細胞土壤真菌Geosiphon pyriforme (K□tz.) v. Wettstein,能與念珠藻屬(Nostoc)形成共生,屬於典型的內生細胞體(endocytobiosis)。該菌喜好生長於潮濕且無機養分含量貧瘠的土壤表層,尤其是缺磷的環境,其細胞壁含有幾丁質,經過幾番爭論,最後自立一個科(Geosiphonaceae)。本篇報告討論其孢子型態及超顯微構造均與內生菌根菌的繡球孢子屬(Glomus)極相似;且其共生系統中與內生菌根菌具有同型的養分流動模式;另以SSU rDNA序列進行分子系統發生學分析,所有結果皆顯示Geosiphon pyriforme與內生菌根菌繡球菌目(Glomales)具有親緣關係,因此推測該菌是繡球菌目演化的視先群成員。 |
英文摘要 | Geosiphon pyriforme (K□tz.) v. Wettstein is a coencoytic soil fungus was found in the natural habitats in Germany and Austria. It is presently known to be a typical example of a fungus living in endocytobiotic association with Nosto (cyanobacterium). They prefer living on the surface and in the upper layer of humid, nutrient poor solid. Especially, in phosphorus-defect site. The cell wall of Geosiphon contains chitin. After several deputation, the organism was described as typifying its own family, Geosiphonanceae. In addition, shape and wall ultrast of the Geosiphon spores and their cytoplasm resemble those of Glmus spores. Also, the nutrient flows interfaces of the Geosiphon and AM symbiosis are homologous. Then, the small-subunit (SSU) ribosomal RNA genes were analyzed and aligned with other sequences. The result shows Geosiphon pyriforme has evolutional relation with Glomales and is also one of its ancestral members. |
本系統之摘要資訊系依該期刊論文摘要之資訊為主。