Impact of cadmium and hydrogen peroxide on ascorbate-glutathione recycling enzymes in barley root

V. Zelinová, B. Bočová, J. Huttová, I. Mistrík and L. Tamás
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V. Zelinová: Institute of Botany, Slovak Academy of Sciences, Bratislava, Slovak Republic
B. Bočová: Institute of Botany, Slovak Academy of Sciences, Bratislava, Slovak Republic
J. Huttová: Institute of Botany, Slovak Academy of Sciences, Bratislava, Slovak Republic
I. Mistrík: Institute of Botany, Slovak Academy of Sciences, Bratislava, Slovak Republic
L. Tamás: Institute of Botany, Slovak Academy of Sciences, Bratislava, Slovak Republic

Plant, Soil and Environment, 2013, vol. 59, issue 2, 62-67

Abstract: We analyse the effect of Cd and H2O2 short-term treatments on the activity of ascorbate-glutathione recycling enzymes in barley root tip. Even a short transient exposure of barley roots to low 15 µmol Cd concentration caused a marked approximately 70% root growth inhibition. Higher Cd concentrations caused root growth cessation during the first 6 h after short-term Cd treatment. Similarly, a marked root growth inhibition was also detected after the short-term exposure of barley seedlings to H2O2. Our results indicate that root ascorbate pool is more sensitive to Cd treatment than glutathione pool. Rapid activation of dehydroascorbate reductase and monodehydroascorbate reductase is the important component of stress response to the Cd-induced alterations in barley root tips. H2O2 is probably involved in the Cd-induced activation of monodehydroascorbate reductase, but it is not involved in the Cd-induced increase of dehydroascorbate reductase activity.

Keywords: dehydroascorbate reductase; glutathione reductase; monodehydroascorbate reductase; root growth inhibition (search for similar items in EconPapers)
Date: 2013
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Persistent link: https://EconPapers.repec.org/RePEc:caa:jnlpse:v:59:y:2013:i:2:id:517-2012-pse

DOI: 10.17221/517/2012-PSE

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