Comparative analysis of aluminum accumulation in leaves of three angiosperm species

• Maejima, Eriko

• Hiradate, Syuntaro

• Jansen, Steven

• Osaki, Mitsuru

• Watanabe, Toshihiro

Abstract

Aluminum (Al) accumulators are widely distributed in the plant kingdom but phylogenetic implications of internal Al detoxification mechanisms are not well understood. We investigated differences in the characteristics of Al accumulation (i.e., accumulation potential, chemical form, and localization) in three woody Al accumulators, Symplocos chinensis (Lour.) Druce var. leucocarpa (Nakai) Ohwi f. pilosa (Nakai) Ohwi (Symplocaceae, Ericales), Melastoma malabathricum L., and Tibouchina urvilleana Cogn. (both Melastomataceae, Myrtales). The order of Al accumulation potential under hydroponic conditions was S. chinensis approximate to M. malabathricum > T. urvilleana. Oxalate was at least partly involved in the internal Al detoxification mechanisms in leaves of all three Al accumulators, based on a correlation analysis between Al and organic acid in water and 0.02 mol.L-1 HCl extracts and the Al-27 nuclear magnetic resonance spectra of intact leaves. However, the Al forms in the leaves were not simple Al-ligand complexes in a specific cell structure. Al localization in leaf sections differed among the three species. Extremely high levels of Al were found in trichomes of the lower epidermis in leaves of T. urvilleana. These data illustrate that woody Al-accumulating angiosperms have independently developed various internal Al-tolerance mechanisms in which oxalate plays a significant role.

Journal

• Botany - Botanique

  Botany - Botanique 92 (5), 327-331, 2014-05

  Canadian Science Publishing

Keywords

• aluminum accumulators
• Melastoma malabathricum L.
• oxalate
• Symplocos chinensis (Lour.) Druce var. leucocarpa (Nakai) Ohwi f. pilosa (Nakai) Ohwi
• Tibouchina urvilleana Cogn.
• trichomes

Details

• CRID: 1050564288970228736
• NII Article ID: 120005455885
• HANDLE: 2115/56550
• ISSN: 19162790
• Text Lang: en
• Article Type: journal article
• Data Source:
  • IRDB
  • CiNii Articles