Cadmium-induced oxidative and nitrosative stress in plants

MP BENAVIDES; SM GALLEGO

Cadmium Toxicity and Tolerance in Plants: From Physiology to Remediation

Elsevier

Lugar: Amsterdam; Año: 2019; p. 233 - 274

The numerous deleterious health effects upon exposure to toxic heavy metals in the environment are a matter of serious concern and a global issue. Cadmium is classified as a no redox metal, but in biological system it is well characterized by developing redox cell imbalance. It is largely studied in many plant species that acute and chronic Cd exposure increase reactive oxygen and nitrogen species (ROS and RNS, respectively) in the cell. ROS and RNS could be acting, either as deleterious molecules inducing an oxidative/nitrosative injury that could result in growth inhibition, accelerated senescence or cell death, or as essential components in the signalling cascade through plants response to cope with metal stress. An understanding of the mechanisms by which plants perceive, transduce and counterbalance Cd-induced oxidative or nitrosative stress signals to initiate acclimation or adaptive responses can be essential for obtaining plants with increased tolerance to metal stress.