Advertisement

Planta

, Volume 212, Issue 3, pp 323–331 | Cite as

The involvement of polyphenols and peroxidase activities in heavy-metal accumulation by epidermal glands of the waterlily (Nymphaeaceae)

  • Noa Lavid
  • Amnon Schwartz
  • Oded Yarden
  • Elisha Tel-Or

Abstract.

Co-localization of polyphenols and peroxidase activity was demonstrated in epidermal glands of the waterlily (Nymphaea) by histochemistry. Total phenols, tannins and peroxidase activity were determined quantitatively in plant extracts. Polyphenols were partially identified and were found to consist mainly of hydrolyzable tannins, gallic and tannic acid derivatives.Nymphaea polyphenols were shown to chelate Cr, Hg, and Pb in vitro, and Cd-binding by polymerized polyphenols was demonstrated in leaves exposed to Cd in vivo. Both polyphenols and peroxidases were found at very high constitutive levels, which were not induced or altered by external conditions, such as light and heavy-metal stress. It is suggested that the polymerization of polyphenols by peroxidases, enhanced after heavy-metal uptake and detoxification, is responsible for the binding of heavy metals in Nymphaea epidermal glands.

Key words: Cadmium accumulation Glandular trichome Heavy metal Nymphaea (Cd accumulation) Peroxidase Polyphenol 

Preview

Unable to display preview. Download preview PDF.

Unable to display preview. Download preview PDF.

Copyright information

© Springer-Verlag Berlin Heidelberg 2001

Authors and Affiliations

  • Noa Lavid
    • 1
  • Amnon Schwartz
    • 1
  • Oded Yarden
    • 2
  • Elisha Tel-Or
    • 1
  1. 1.Department of Agricultural Botany, The Hebrew University of Jerusalem, P.O. Box 12, Rehovot 76100, IsraelIL
  2. 2.Department of Phytopathology, The Hebrew University of Jerusalem, P.O. Box 12, Rehovot 76100, IsraelIL

Personalised recommendations