Study on the Taxol Content in Taxus yunnanensis of Different Age and Different Provenance

Contents of taxol in barks,3 years old shoots and 1 year old needles of Taxus yunnanensis of 10 ages and 12 provenances were analyzed by HPLC.The average contents of taxol in the barks,3 years old shoot and 1 year old needles were 0.004 8%,0.004 0% and 0.015 1% respectively.The contents of taxol in barks had a significantly correlation with age.The contens of taxol in 3 years old shoot and 1 year old needles of the plant had no significant correlation with age.In 12 different Taxus yunnanensis provenances,the contents of taxol in 1 year old needles from Xinping,Linlang and Lushui provenances were higher;the contents of taxol in 3 years old shoot from Langping,Linlang and Xinping provenances were higher;the contents of taxol in barks from Jingdong,Muli and Linlang provenances were higher.It was found that temperature,nutrition and sunshine were the most important among six essential factors affecting the content of taxol.