plants face many biotic and abiotic stresses at the same time during their growth under field conditions. plants responses toward combined stresses are often more complex than their responses to one type of stress in a way that the results of these responses are called as cross tolerance. this mixture of stresses activates specific models of gene expression that causes special signaling network...

objective: ageing of the stored seed is a natural phenomenon and the seeds tend to lose viability even under ideal storage conditions. accelerated ageing has been recognized as a good predictor of the storability of seed lots. aged seeds show decreased vigor and produce weak seedlings that are unable to survive once reintroduced into a habitat. the characteristics of the chemical composition of...

extremely low frequency (elf) electromagnetic field (elf-emfs) are widely employed in electrical appliances and different equipment such as television sets, elf-emfs can  affect biological systems by increasing production  ros. the altered balance between ros generation and elimination plays a critical role in a variety of pathologic conditions. ros levels have been observed in several hematopo...

background , despite numerous studies over a decade, it still remains controversial about the biological effects of rf emf emitted by mobile phone telephony. objective , here we investigated the effect of 900 mhz gsm on the induction of oxidative stress and the level of intracellular reactive oxygen species (ros) in human mononuclear cells, monocytes and lymphocytes as defence system cells. met...

objective(s):many studies have reported that tea consumption decreases cardiovascular risk, but the mechanisms remain unclear. green tea is known to have potent antioxidant and free radical scavengingactivities. this study aimed to investigate whether green tea extract (gte) can protect endothelial progenitors cells (epcs) against oxidative stress through antioxidant mechanisms. materials and m...

The understanding of seed dormancy, germination and longevity are important goals in plant biology, with relevant applications for agriculture, food industry and also human nutrition. Reactive Oxygen Species (ROS) are key molecules involved in the release of dormancy, when their concentrations fall within the so called 'oxidative window.' The mechanisms of ROS distribution and sensing in seeds,...

Abstract When mature Arabidopsis thaliana seeds are dormant, their germination is prevented in apparently favorable conditions. This primary dormancy can be released during seed dry storage through a process called after-ripening whose duration last several months. To reduce this delay, cold atmospheric plasmas (CAPs) used as sources of reactive oxygen species (ROS) capable inducing heterogeneo...