Biological Trace Element Research

, Volume 82, Issue 1–3, pp 239–245 | Cite as

Extended X-ray absorption fine-structure study of the bound form of lanthane in chlorophyll-a from Dicranopteris dichotoma

  • Hong Fashui
  • Wei Zhenggui
  • Zhao Guiwen
  • Tao Ye
  • Hu Tiandou
  • Xie Yanin
  • Liu Tao
Article

Abstract

The in vivo coordination structure of lanthanum ions interacting with chlorophyll-a of the fern Dicranopteris dichotoma grown in a rare earth minefield in southern China was determined by the extended x-ray absorption fine structure (EXAFS). The results show that lanthanum includes two porphyrin rings in its coordination sphere. It is postulated that the La-chlorophyll-a complex may have a bilayer structure. The analytical method may serve as a new tool to gain insight in the in vivo interactions of rare earth elements.

Index Entries

Dicranopteris dichotoma EXAFS rare earth elements lanthanum 

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Copyright information

© Humana Press Inc. 2001

Authors and Affiliations

  • Hong Fashui
    • 1
  • Wei Zhenggui
    • 2
  • Zhao Guiwen
    • 2
  • Tao Ye
    • 3
  • Hu Tiandou
    • 3
  • Xie Yanin
    • 3
  • Liu Tao
    • 3
  1. 1.Department of BiologySuzhou UniversitySuzhouPeople’s Republic of China
  2. 2.Department of ChemistryUniversity of Science and Technology of ChinaHefeiPeople’s Republic of China
  3. 3.Synchrotron Radiation Lab, Institute of High Energy PhysicsChinese Academy of ScienceBeijingPeople’s Republic of China

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