Both the concentration and redox state of glutathione and ascorbate influence the sensitivity of arabidopsis to cadmium.

ABSTRACT:

Background and aims

Cadmium (Cd) is a non-essential trace element that elicits oxidative stress. Plants respond to Cd toxicity via increasing their Cd-chelating and antioxidative capacities. They predominantly chelate Cd via glutathione (GSH) and phytochelatins (PCs), while antioxidative defence is mainly based on the use and recycling of both GSH and ascorbate (AsA), complemented by superoxide dismutase (SOD) and catalase (CAT). In addition, both metabolites act as a substrate for the regeneration of other essential antioxidants, which neutralize and regulate reactive oxygen species (ROS). Together, these functions influence the concentration and cellular redox state of GSH and AsA. In this study, these two parameters were examined in plants of Arabidopsis thaliana exposed to sub-

SUBMITTER: Jozefczak M 

PROVIDER: S-EPMC4577996 | biostudies-literature | 2015 Sep

REPOSITORIES: biostudies-literature