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

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

201 Scopus citations

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.

Original languageAmerican English
Pages (from-to)323-331
Number of pages9
JournalPlanta
Volume212
Issue number3
DOIs
StatePublished - 2001

Keywords

  • Cadmium accumulation
  • Glandular trichome
  • Heavy metal
  • Nymphaea (Cd accumulation)
  • Peroxidase
  • Polyphenol

Fingerprint

Dive into the research topics of 'The involvement of polyphenols and peroxidase activities in heavy-metal accumulation by epidermal glands of the waterlily (Nymphaeaceae)'. Together they form a unique fingerprint.

Cite this