Comparative study on the sensitivity of turions and active fronds of giant duckweed (Spirodela polyrhiza (L.) Schleiden) to heavy metal treatments

Chemosphere
Viktor OláhIlona Mészáros

Abstract

Standard ecotoxicological test procedures use only active forms of aquatic plants. The potential effects of toxicants on vegetative propagules, which play an important role in the survival of several aquatic plant species, is not well understood. Because turion-like resting propagules overwinter on the water bottom in temperate regions, they could be exposed to contaminants for longer periods than active plants. Due to its turion producing capability, giant duckweed (Spirodela polyrhiza) is widely used in studying morphogenesis, dormancy, and activation mechanisms in plants. It is also suitable for ecotoxicological purposes. The present work aims to compare the growth inhibition sensitivity of active (normal frond) and overwintering (turion) forms of S. polyrhiza to concentrations of nickel (Ni), cadmium (Cd) and hexavalent chromium (Cr) ranging from 0 to 100mgL(-1). The results indicated that in general, resting turions have higher heavy metal tolerance than active fronds. Cd proved to be the most toxic heavy metal to S. polyrhiza active frond cultures because it induced rapid turion formation. In contrast, the toxicity of Ni and Cr were found to be similar but lower than the effects of Cd. Cr treatments up to 10mgL(-1) did no...Continue Reading

References

Jan 1, 1997·Environmental Pollution·P DasG R Rout
May 10, 2005·Environment International·Arun K ShankerS Avudainayagam
Aug 5, 2008·Aquatic Toxicology·Klaus-J AppenrothHalina Gabrys
Dec 21, 2010·Bulletin of Environmental Contamination and Toxicology·M YusufA Ahmad
Jan 25, 2014·BMC Genomics·Wenqin WangJoachim Messing

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Citations

Mar 19, 2016·Bulletin of Environmental Contamination and Toxicology·Viktor OláhIlona Mészáros
May 23, 2019·AoB Plants·Waldemar Viana Andrade JúniorAnderson de Santana Botelho

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