Phytotoxic Terpenoids from Roots.

Journal: Frontiers in plant science
Published Date: Jan 9, 2017

Abstract

is one of the predominant species in the Hengduan Mountains, China, and has led to a decrease in the amount of forage grass in this area. However, little is known about the mechanism behind its predominance. In this study, two novel eremophilane sesquiterpenes, ligulacymirin A and B ( and ), together with seven other known terpenoids (), were isolated from the roots of . The structures of and were determined by spectroscopic methods and single-crystal X-ray diffraction. Each compound showed phytotoxic activities against , and each was detected and identified in rhizosphere soil by UHPLC-MS. Compound was the most potent phytotoxin, showing remarkable inhibition against both seedling growth (EC = 30.33 ± 0.94 μg/mL) and seed germination (EC = 155.13 ± 0.52 μg/mL), with an average content in rhizosphere soil of 3.44 μg/g. These results indicate that terpenoids in roots might be released as phytotoxins in rhizosphere soil to interfere with neighboring plants.

Authors

  • Jia Chen
    Department of Oncology Internal Medicine, Nantong Tumor Hospital, Affiliated Tumor Hospital of Nantong University, Nantong, China.
  • Guowei Zheng
    Germplasm Bank of Wild Species, Kunming Institute of Botany, Chinese Academy of Sciences Kunming, China.
  • Yu Zhang
    College of Marine Electrical Engineering, Dalian Maritime University, Dalian, China.
  • Haji A Aisa
    The Key Laboratory of Plant Resources and Chemistry of Arid Zone, Xinjiang Technical Institute of Physics and Chemistry, Chinese Academy of Sciences Urumqi, China.
  • Xiao-Jiang Hao
    State Key Laboratory of Phytochemistry and Plant Resources in West China, Kunming Institute of Botany, Chinese Academy of Sciences Kunming, China.

Keywords

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