Exaggeration of desiccation stress by heavy metal pollution in Tortula ruralis: A pilot study

Zoltán Takács, Zoltán Tuba, Nicholas Smirnoff

Research output: Contribution to journalArticle

10 Citations (Scopus)

Abstract

Glutathione pool and redox status, as well as chlorophyll fluorescence were measured in Tortula ruralis which was treated with heavy metals and exposed to different desiccation treatments. Two hours after re-wetting, the ratio of oxidised glutathione to total glutathione pool returned to the steady state level (14%) in slowly dried unpolluted plants. Cd treatment doubled this ratio, as did rapid drying without the heavy metal treatment. When Cd and rapid drying were applied together, the ratio of GSSG reached 45% indicating a clear additive effect of these two stress factors. RFd, a chlorophyll fluorescence parameter followed a similar pattern. Lead did not cause the depletion of the glutathione pool but increased the ratio of GSSG. It is suggested that Cd and rapid desiccation exert their damage additively. This might also entail a lowered degree of desiccation tolerance in areas polluted with metals and therefore a retreat of the mosses to mesic microhabitats.

Original languageEnglish
Pages (from-to)157-160
Number of pages4
JournalPlant Growth Regulation
Volume35
Issue number2
DOIs
Publication statusPublished - Dec 1 2001

Keywords

  • Cd
  • Glutathione
  • Oxidative stress

ASJC Scopus subject areas

  • Physiology
  • Agronomy and Crop Science
  • Plant Science

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