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題 名 | 臺灣紅豆杉母樹與營養系分株不同葉齡紫杉烷類含量之季節性變化=Seasonal Variation in Taxane Concentrations of Differentaged Needles from Wild Trees and Ortets of Taxus Mairei (Lemee & Levl.) Hu ex Liu |
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作 者 | 何政坤; 張淑華; 蔡錦瑩; | 書刊名 | 臺灣林業科學 |
卷 期 | 15:3 2000.09[民89.09] |
頁 次 | 頁365-377 |
分類號 | 377.13 |
關鍵詞 | 葉齡; 營養系分株; 季節; 紫杉烷類; 紫杉醇; 臺灣紅豆杉; 天然母樹; Needle age; Ortet; Season; Taxanes; Taxol; Taxus mairei; Wild tree; |
語 文 | 中文(Chinese) |
中文摘要 | 台灣紅豆杉針葉依據葉齡分成當年生正發育 (Y1葉) 、發育完全的年 輕葉 (Y2葉) ,及1、 2年生成熟葉 (O1、O2葉) 。採集生長在台灣海拔約2000 m的東、北部高山,各10與11 株台灣紅豆杉母樹的Y2與O1葉,經分析其紫 杉烷類濃度,發現單株間變異大,紫杉烷類中的10-deacetylbaccatin III (DB) 與 baccatin III (BC) 的濃度是Y2葉高於O1葉,但其他成分10-deacetyltaxol (DTX) 、cephalomannine(CPH) 、紫杉醇與7-epi-10-deacetyltaxol (ETX) 則剛好 相反。此種結果也同樣發現在中部種源6株母樹不同葉齡的季節性成分分析。 Y2 與O1葉齡間主成分如DB、CPH、紫杉醇與總紫杉烷類濃度的季節性變化曲線 多相當一致,六種紫杉烷類濃度的季節性變化中,僅有DB濃度在春夏秋季差異 不顯著,到初冬時濃度顯著的陡增3-4倍,到冬末植物完全休眠時,濃度又降到 最低點。其他5種紫杉烷類多數單株都呈現春冬高而夏秋低的趨勢,但有一單株 紫杉醇濃度在秋季高而冬季低,顯示單株間的表現仍有差異。無性繁殖自天然母 樹的2生長頗佳營養系分株,經在海拔40 m的台北植物園溫室培育2年後,在 冬季所分析O1葉的DB與紫杉醇濃度均與原母樹相當,顯示這些成分可穩定的 在營養系分株表現出來,但其季節性成分變化趨勢則與天然母樹不同。此二成分 在不同葉齡的濃度都呈Y1 > Y2 > O1 > O2,而且在夏季的濃度較高。 |
英文摘要 | Different needle ages of Taxus mairei trees were separated into Y1, Y2, O1, and O2, representing developing and developed needles for the current year, and 1- and 2-yr- old needles, respectively. Taxanes in Y2, O1, and O2 winter-needles of 10- 11 trees located in the eastern and northern mountains at 2000 m elevation in Taiwan were determined. A great variation was revealed among these individual trees. Generally, concentrations of 10-deacetylbaccatin III (DB) and baccatin III (BC) in Y2 were greater than those in O1, whereas other taxanes including 10-deacetyltaxol (DTX), cephalomannine (CPH), taxol, 7-epi-10-deacetyltaxol (ETX), and the sum of 6 taxanes (TXN) were greater in O1 than in Y2. This also proved true in seasonal changes for 6 taxane concentrations of 6 trees located at central Taiwan. Seasonal changes in concentrations of major taxanes such as DB, CPH, taxol, and total taxanes between Y2 and O1 needles showed similar patterns. Only DB maintained similar concentrations in spring, summer, and fall. It then significantly increased 3-4 times in concentration in early winter, but dropped down to the lowest point in late winter, at a time when plants are dormant. Meanwhile the other 5 taxane concentrations appeared to be high in both spring and winter, but lower in summer and fall. Only 1 tree showed different patterns, in which needles had high taxol concentration in spring and fall but low in summer and winter. Two ortets with rapid growth, vegetatively propagated from wild trees, were being raised in a greenhouse of the Taipei Botanical Garden (ca 40 m in elevation) for 2 yr. The DB and taxol concentrations of O1 winter- needles of ortets were similar to those of their mother trees indicating that the heritage of chemical yield is preserved, but the trend of seasonal changes differed from that of the wild trees. These 2 components showed gradient concentrations of Y1 > Y2 > O1 > O2, with the greatest amounts in summer. |
本系統中英文摘要資訊取自各篇刊載內容。