The glutathione system as a stress marker in plant ecophysiology: is a stress-response concept valid?

The glutathione system as a stress marker in plant ecophysiology: is a stress-response concept valid?

Environmental stress impacts cause an increased formation of reactive oxygen species (ROS) in the chloroplasts (photo-oxidative stress). The role of glutathione in the antioxidative defence system provides a rationale for its use as a stress marker. However, responses of glutathione concentrations and redox states are not consistent among the large number of available publications. In the prese...

Detection of 3-nitrotyrosine in proteins and tissues is considered a valid marker of oxidative stress

Glutathione Peroxidase as an Oxidative Stress and Insulin Resistance Marker in a group of Egyptian Patients with Normoglycemic Sickle Cell Disease

Background: Sickle cell disease (SCD) which is characterized by abnormal hemoglobin structure has a carrier rate of 9-20% in Egypt. Reactive oxygen species (ROC) in SCD cause multiple organ injuries, endocrine complications and metabolic alteration such as insulin resistance (IR) in children and young adults. We aimed to determine the presence of IR in normoglycemic SCD patients and also assess...

Antioxidant System Response and cDNA-SCoT Marker Profiling in Phoenix dactylifera L. Plant under Salinity Stress

Many Phoenix dactylifera (date palm) cultivars are grown in the arid and semiarid regions of the world, including Saudi Arabia. P. dactylifera is highly tolerant to salinity stress. To investigate the response of Khalas cultivar of P. dactylifera, two-month-old plants were treated with sodium chloride (50, 100, and 150 mM NaCl) for three months. Our result showed that proline content was higher...

Psychological Stress as a Theoretical Concept

An examination of some typical treatments of psychological stress is carried out in this paper. The approach of construing stress in analogy to physical and physiological concepts is rejected since these approaches have not led to quantifiable insights into the action of stress with respect to human behavior. A systematic approach, based on the presentation of J. S. Brown and I. E. Farber, is s...