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Active oxygen. --- Oxygen radicals --- Reactive oxygen --- Singlet oxygen --- Superperoxide anion --- Free radicals (Chemistry) --- Ionization of gases --- Oxygen

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Oxygen represents only 20% of the Earth's atmosphere, yet it is vital for the survival of aerobic organisms. There is a dark part of the use of oxygen that consists in generating reactive species that are potentially harmful to living organisms. Moreover, reactive oxygen species can combine with nitrogen derivatives and generate many other reactive species. Thus, living organisms are continuously assaulted by reactive species from external or internal sources. However, the real danger comes in the case of high concentrations and prolonged exposure to these species. This book presents an image of the mechanisms of action of reactive species and emphasizes their involvement in diseases. Inflammation and cancer are examined to determine when and how reactive species turn the evolution of a benign process to a malignant one. Some answers may come from recent studies indicating that reactive species are responsible for epigenetic changes.

Active oxygen. --- Oxygen radicals --- Reactive oxygen --- Singlet oxygen --- Superperoxide anion --- Free radicals (Chemistry) --- Ionization of gases --- Oxygen --- Medicine --- Health Sciences --- Cell Biology

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Actieve zuurstof --- Active oxygen --- Oxygen radicals --- Oxygène actif --- Radicalen (Chemie) --- Radicals (Chemistry) --- Radicaux (Chimie) --- Reactive oxygen --- Singlet oxygen --- Superperoxide anion --- Zuurstof [Actieve ] --- FREE RADICALS --- Oxygen --- metabolism --- OXYGEN --- Free radicals --- Free radicals. --- metabolism. --- Metabolism. --- Oxygen - metabolism

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Free radicals (Chemistry) --- Active oxygen --- Biochemistry --- Biology --- Free Radicals --- Medicine --- Medical Specialities --- Medical Specialties --- Medical Specialty --- Specialities, Medical --- Specialties, Medical --- Specialty, Medical --- Medical Speciality --- Speciality, Medical --- Radicals, Free --- Oxygen radicals --- Reactive oxygen --- Singlet oxygen --- Superperoxide anion --- Health Workforce --- Free Radical Scavengers --- Reactive Oxygen Species --- Radicals (Chemistry) --- Free radical reactions --- Ionization of gases --- Oxygen --- Free Radical --- Radical, Free --- Biology. --- Free Radicals. --- Medicine.

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Until recent years the production of reactive oxygen species (ROS) was generally considered to be a harmful process and a generator of oxidative stress. But more recently this concept has been re-evaluated and the term "oxidative signaling" was coined (Foyer and Noctor, 2005). This means that ROS generation is also an important component of the signaling network of plants. Results obtained during the last decade have highlighted that ROS are key regulators of plant metabolism, morphology and development which are also used by plants to respond to environmental challenges. The role of ROS as signals for gene expression has been established, and ROS also modulate the activity of key signaling compounds such as MAP kinases. The volume of research into the roles of ROS in plants is currently growing and the purpose of this book is to present recent advances in this field. The constitutive chapters are arranged around four main topics: - The generation of ROS and their network signaling, including the retrograde signaling from the chloroplast to the nucleus and the cross-talk with hormone signaling -The signaling role of ROS produced in some sub-cellular compartments -The role of ROS in plant growth, development, functioning and stress acclimation -Their role in biotic and abiotic interactions.

Active oxygen. --- Plant cellular signal transduction. --- Cellular signal transduction --- Plant cellular control mechanisms --- Oxygen radicals --- Reactive oxygen --- Singlet oxygen --- Superperoxide anion --- Free radicals (Chemistry) --- Ionization of gases --- Oxygen --- Plant physiology. --- Biochemistry. --- Botany. --- Plant Physiology. --- Plant Biochemistry. --- Plant Sciences. --- Botanical science --- Phytobiology --- Phytography --- Phytology --- Plant biology --- Plant science --- Biology --- Natural history --- Plants --- Biological chemistry --- Chemical composition of organisms --- Organisms --- Physiological chemistry --- Chemistry --- Medical sciences --- Botany --- Physiology --- Composition --- Plant biochemistry. --- Plant science. --- Phytochemistry --- Plant biochemistry --- Plant chemistry --- Biochemistry --- Phytochemicals --- Plant biochemical genetics --- Floristic botany