Expression of defence-related peroxidases Prx7 and Prx8 during abiotic stresses in barley roots

Autor: Jana Huttová, Katarína Ďurčeková, Ladislav Tamás, Igor Mistrík
Rok vydání: 2008
Předmět:
Zdroj: Acta Physiologiae Plantarum. 31:139-144
ISSN: 1861-1664
0137-5881
DOI: 10.1007/s11738-008-0212-0
Popis: The expression of defence-related peroxidases Prx7 and Prx8 in barley roots grown under selected abiotic stress conditions (toxic metals: Cd, Al, Co, Cu, Hg; drought, salinity, extreme temperatures: heat, cold) and compounds activating (2,4-D) or inhibiting (SHAM) POD activity as well as H2O2 and H2O2 scavenger (DTT) was characterized. Strong Cd concentration dependent expression of Prx8 peroxidase gene was observed, which correlated with root growth inhibition induced by Cd- and some other stress factors (heavy metals, heat and salinity). Application of H2O2 did not cause changes in expression of Prx8, but H2O2 scavenger (DTT) as well as the inhibitor (SHAM) and the activator (2,4-D) of PODs induced increase in Prx8 expression. Our results demonstrate that root growth inhibition during any disturbance of active oxygen species (AOS) in root tissue is correlated with up-regulation of Prx8 gene expression in barley roots.
Databáze: OpenAIRE