Earth Sciences

Special Issue

Conservation of Taxus Spp. (Yew)

  • Submission Deadline: Mar. 20, 2015
  • Status: Submission Closed
  • Lead Guest Editor: Gülay Sezerer Kuru
About This Special Issue
Taxus baccata Linn, is a valuable plant for taxol or paclitaxel extraction used in the preparation of anti-cancer drugs (breast and ovarian cancer), kaposi’s sarcoma (an AIDS related cancer) and over 20 such other indications. It is a slow growing evergreen tree found in the temperate forests in altitude ranging between 1500 m to 3000 m. Around 2 to 3 million kg of biomass is harvested annually where as the sustainable rate of harvesting is estimated to be 0.6 million kg per year. The tree has spreading branchlets and leaves arranged in two whorls which are 2.5 to 3.5 cm long and linear. They are glossy green above and pale beneath which distinguishes the tree from Cephalotaxus and Tsuga which have leave undersurface white. Fruits are 0.7 to 1 cm long with succulent bright red disc that covers the blackish olive green seed. Taxus flowers during March to May and seeds are produced during October to November. The native areas of the plant are Algeria, Australia, Belgium, Bhutan, Bosnia and Herzegovina, Bulgaria, Canada, China, Croatia, Czech Republic, Denmark, El Salvador, Estonia, Finland, France, Germany, Greece, Guatemala, Hungary, India, Iran, Italy, Japan, Korea, Republic of, Lithuania, Mexico, Morocco, Nepal, Norway, Philippines, Poland, Portugal, Romani, Russian Federation, Spain, Sweden, Switzerland, Taiwan, Province of China, Turkey, Ukraine, United Kingdom, United States of America, Vietnam. The plant is threatened and enlisted in the negative lists of export Appendix II of CITES. Therefore, there is a great need of conservation and regeneration of the plant in these areas.
Lead Guest Editor
  • Gülay Sezerer Kuru

    MTA, mineral Research and Expolaration, TMA, Ankara, Turkey

Guest Editors
  • Gibji Nimasow

    Department of Geography, Rajiv Gandhi University, Itanagar, India

  • Gibji Nimasow

    Department of Geography, Rajiv Gandhi University, Itanagar, India

Published Articles
  • Taxus globosa Schltdl. (Taxaceae). Distribution and Diagnosis of an Endangered Yew

    Javier López-Upton , Xavier Garcia-Martí

    Issue: Volume 4, Issue 3-1, May 2015
    Pages: 80-88
    Received: Mar. 20, 2015
    Accepted: Mar. 21, 2015
    Published: Apr. 28, 2015
    DOI: 10.11648/j.earth.s.2015040301.13
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    Abstract: After prospecting the vast majority of the populations and consulting herbarium collections and literature, data of distribution and demography of the Mexican populations of Taxus globosa is presented. Besides, the global distribution as the status of the species and its ecology is reviewed. Some populations are well preserved, however most of the ... Show More
  • Vanishing Taxus baccata L. Due to Unsustainable Exploitation and Climate Change in West Kameng and Tawang Districts of Arunachal Pradesh

    Gibji Nimasow , Oyi Dai Nimasow , Gendan Tsering

    Issue: Volume 4, Issue 3-1, May 2015
    Pages: 11-18
    Received: Jan. 21, 2015
    Accepted: Jan. 22, 2015
    Published: Mar. 03, 2015
    DOI: 10.11648/j.earth.s.2015040301.12
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    Abstract: Taxus baccata, a small to medium sized tree is valuable for extraction of taxol which is used in preparation of anti-cancer drugs (breast and ovarian cancer), kaposi’s sarcoma (an AIDS related cancer) and over 20 such other indications. The plant is rare, endangered and listed in Appendix II of Convention on International Trade in Endangered Specie... Show More
  • Conservation Efforts of an Important Medicinal Plant (Taxus baccata Linn.) in West Kameng District of Arunachal Pradesh (India)

    Gibji Nimasow , Oyi Dai Nimasow , Jawan Singh Rawat , Leki Norbu

    Issue: Volume 4, Issue 3-1, May 2015
    Pages: 1-10
    Received: Jan. 05, 2015
    Accepted: Jan. 10, 2015
    Published: Mar. 03, 2015
    DOI: 10.11648/j.earth.s.2015040301.11
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    Abstract: Taxus is a small to medium sized tree, with red ‘berries’ (seed covered by arils), valuable for taxol or paclitaxel extraction used in the preparation of anti-cancer drugs (breast cancer and ovarian cancer), kaposi’s sarcoma (an AIDS related cancer) and over 20 such other indications. It is an evergreen tree found in the temperate forests with an a... Show More