Adult and embryonic stem cells hold great promise for regenerative medicine. Expression profiling of stem cells revealed a characteristic imprint of genes, so-called "stemness" genes, providing resistance to stress. Circulating progenitor cells with an endothelial phenotype (EPCs) can be isolated from peripheral blood and contribute to neovascularization and endothelial regeneration. We investi...

Honey bee (Apis mellifera) sperm remains viable in the spermatheca of mated female honey bees for several years. During this time, the sperm retains respiratory activity, placing it at risk of the damaging effects of reactive oxygen species common to many biological processes. Antioxidative enzymes might help reduce this damage. Here we use quantitative real-time RT-PCR to establish gene-expres...

Biochemical adaptations and morphological changes are cellular aptitude originated on biotic and abiotic stresses. Polyethylene glycol (PEG) induces drought stress in the nutrient solution. In the present investigation, Caralluma tuberculata calli is exposed to PEG and antioxidative molecules. By increasing the level of antioxidative enzymes (SOD, POD, CAT, APX, and GR), the PEG-stressed calli ...

Reactive oxygen species are known to increase in plant senescence. We investigated the participation of antioxidative enzymes in initiation of cotyledon senescence. Senescence of bean (Phaseolus vulgaris L.) cotyledons was modulated by UV C irradiation and by the decapitation of plant apices. Senescence was accompanied by a decrease of protein content and by a decrease of photochemical efficien...

Adult and embryonic stem cells hold great promise for regenerative medicine. Expression profiling of stem cells revealed a characteristic imprint of genes, so-called “stemness” genes, providing resistance to stress. Circulating progenitor cells with an endothelial phenotype (EPCs) can be isolated from peripheral blood and contribute to neovascularization and endothelial regeneration. We investi...

Antioxidative status study was made in cotyledons of 7days old as well as in leaf and stem tissues of 30 and 60 days old pigeon pea (Cajanus cajan) namely Asha and Maruti subjected to different doses of endosulfan in the range 0.1-1.0%. The results revealed that the activities of the antioxidative enzymes and the antioxidant contents such as the super oxide dismutase (SOD), peroxidase (POD), re...

melissa (melissa offcinalis l.), a member of a lamiaceae family, is a medical plant. the main most important pharmacological properties can be soothin, strengthening nerve, carminative and memory booster. the presence of heavy metals is one of important environmental stresses that can reduce growth and production of types of reactive oxygen. in the present study, the effect of copper sulfate (c...

Free radicals and other active derivatives of oxygen are inevitable by-products of biological redox reactions. Reactive oxygen species inactivate enzymes and damage important cellular components. The increased production of toxic oxygen derivatives is considered to be a universal or common feature of stress conditions. Plant and other organisms have evolved a wide range of mechanisms to contend...