Strategy of Cr detoxification by Callitriche cophocarpa
Joanna Augustynowicz , Anna Kołton , Agnieszka Baran , Anna Kostecka-Gugała , Wojciech Lasek
AbstractThe present work focused on the qualitative and quantitative analysis of Cr detoxification strategy of aquatic cosmopolitan plant Callitriche cophocarpa. This plant species has just been described in the context of its unusual accumulation potential of Cr. The emphasis of the work was placed on the redox reaction Cr(VI)→Cr(III) which is considered to be remediation mechanism of highly reactive and mobile Cr(VI) ions. Plants were immersed for 5 days in 1 mM of Cr(VI) (potassium dichromate) or 1 mM of Cr(III) (chromium sulphate) solutions in semi-natural conditions. Cr was effectively removed from the solution up to the extent of Ca.58% or 35% of the starting amount, in the case of Cr(III) and Cr(VI), respectively. No plant-induced Cr(VI) reduction accompanying Cr accumulation was observed in Cr(VI) solutions except from the apparent one, noticed at the fourth day of incubation. On the contrary to these results, according to the method of electron paramagnetic resonance spectroscopy (L-band EPR), biphasic signal of Cr(V) attending Cr(VI) to Cr(III) reduction was detected inside the plant tissue every day of investigations. Our results show that phytoextraction but not phytostabilization is the main strategy of Cr detoxification by C. cophocarpa in aquatic systems.
|Journal series||Central European Journal of Chemistry, ISSN 1895-1066, (A 25 pkt)|
|Publication size in sheets||0.5|
|Keywords in English||Callitriche, chromium, EPR, phytoremediation, aquatic macrophytes|
|License||Journal (articles only); author's original; ; after publication|
|Publication indicators||= 8; : 2013 = 0.635; : 2013 = 1.329 (2) - 2013=1.26 (5)|
|Citation count*||6 (2016-06-02)|
|Finansowanie||Narodowe Centrum Nauki grant DEC-2011/03/B/NZ9/00952|
* presented citation count is obtained through Internet information analysis and it is close to the number calculated by the Publish or Perish system.