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All kinds of abiotic and biotic stresses significantly limit plant productivity by disturbing cellular biochemistry and physiology via the overproduction of activated oxygen molecule-reactive oxygen species (ROS). Uncontrolled accumulation of ROS results in oxidation of DNA and RNA, protein denaturation and decreased enzyme activity as well as lipid peroxidation and carbohydrate oxidation. Within the antioxidant system in plants, the ascorbate-glutathione (AsA-GSH) path-way plays an important role in regulating and controlling the content of ROS.
Dehydroascorbate reductase (DHAR) is located in the chloroplasts, cytosol, mitochondria and peroxisomes. As a regulatory enzyme of the AsA-GSH path-way, DHAR plays a critical role in maintaining ascorbate pool size and redox state by catalyzing the reduction of DHA at the expense of GSH yielding glutathione disulfide (GSSG). The activity of DHAR increases under several stress conditions, such as drought, salinity, ozone, and chilling.
STEMart provides comprehensive analysis services to identify and investigate the function of DHAR in regulating plant environmental stress responses.
Plant tissue
For more information about our plant DHAR analysis service, please contact us.
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