台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

何政坤(Cheng-Kuen Ho) ； 張淑華(Shu-Hwa Chang) ； 蔡錦瑩(Jin-Yin Tsai)

《台灣林業科學》 15卷3期 (2000/09) Pp. 365-377

https://doi.org/10.7075/TJFS.200009.0365

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 l0-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.

關鍵字

葉齡 ； 營養系分株 ； 季節 ； 紫杉烷類 ； 紫杉醇 ； 台灣紅豆杉 ； 天然母樹

並列摘要

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 l0-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.

並列關鍵字

needle age ； ortet ； season ； taxanes ； taxol ； Taxus mairei ； wild tree