查詢結果分析
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頁籤選單縮合
題 名 | Gene Investigation into the Inner Bark of Taiwania (Taiwania Cryptomerioides)=臺灣杉內樹皮之基因調查 |
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作 者 | 李承先; 詹明勳; 王亞男; 曲芳華; | 書刊名 | Botanical Studies |
卷 期 | 47:2 民95.04 |
頁 次 | 頁111-118 |
分類號 | 371.8 |
關鍵詞 | 臺灣杉; 內樹皮; 基因表現標籤; Expressed sequence tags; ESTs; Inner bark; Taiwania; Taiwania cryptomerioides hayata; |
語 文 | 英文(English) |
中文摘要 | 臺灣杉為臺灣原產的重要經濟樹種之一。目前為止,超過一百種以上的臺灣杉二次代謝產物被分離純化。經實驗證實,臺灣杉的精油及二次代謝產物具有多樣變化的生物活性,包括抗細菌、抗真菌、抗白蟻、抗螨、抗氧化及抗腫瘤細胞等活性。因此,為了要了解參與臺灣杉生化合成及其木材形成的基因,於是我們構築了臺灣杉內樹皮的cDNA資料庫,並利用單向的序列解序,共獲得973筆基因表現標籤,續由BLASXT搜尋比對,發現這些基因多與細胞救助、防禦及老化等生理功能相關,其中以對抗病原的部份數目最多。另外,與細胞壁結構與二次代謝物相關的基因則佔2.3%。特別的是,在此臺灣杉內樹皮基因資料庫中,約有57%的基因無法自目前已發表的基因中比對出相似的序列,由此顯示臺灣杉基因的唯一性與其特殊性,相當值得針對其功能進行深入的探討與研究。 |
英文摘要 | Taiwania (Taiwania cryptomerioides Hayata) is conifer tree indigenous to Taiwan and one of the most economically important forest tree species on the island. More than 100 secondary metabolites have been isolated from this species. Essential oils and extracts from Taiwania possess many bioactivities, including antibacterial, antifungal, antitermite, antimite, antimite, antioxidiant and antitumor activities. In order to research those genes involved in biochemical synthesis and wood formation, we constructed a cDNA library from the inner back of Taiwania. Using single-pass sequencing of cDNA clones, 973 expressed sequence tags (ESTs) were generated. A BLASTX search revealed that ESTs related to cell rescue, defense and cell aging were abundant in the inner bark library, especially genes that respond to pathogen infection. In addition, homology analysis revealed that ESTs related to cell wall structure and secondary metabolism represented about 2.3% of the clones. However, 57% of the ESTs from Taiwania showed no significant similarity to any other protein sequences in the public databases. These sequences indicate the uniqueness of Taiwania, and its consequently remarkable value. |
本系統中英文摘要資訊取自各篇刊載內容。