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Oxidative stress is a central factor in a number of biotic and abiotic stress phenomena that occurs when there is a serious imbalance in any plant cell compartment between the production of reactive oxygen species (ROS) and antioxidant defense, leading to physiological and metabolic changes. The presence of high concentration of ROS in cells causes oxidative damage to photosynthetic functions and vital bio-molecules, and disrupt cellular metabolism. Thus, it is important for plant cells to have tight control on the concentration of ROS. Plants possess to a variable extent antioxidant metabolites, enzymes and non-enzymes that have the ability to detoxify ROS thus, to protect the photosynthetic- and cellular functions against ROS-caused oxidative stress and to maintain optimum growth, development and productivity under changing environment.The current volume mainly elucidates major recent advances through physiological and molecular studies on the aspects of the causes, consequences of oxidative stress and also discusses and suggests potential strategies for enhancing tolerance to oxidative stress in detail in the light of recent advances in molecular biology.
1. An Introduction to Oxidative Stress in Plants and the Role of Non-Enzymatic Antioxidants 2. Environmental Factors Affecting Components of Ascorbate-Glutathione Pathway in Crop Plants. 3. Regulatory Role of Components of Ascorbate-Glutathione (AsA-GSH) Pathway in Plant Tolerance to Oxidative Stress. 4. Ascorbate and Glutathione: Saviours Against Oxidative Stress. 5. Ascorbate-Glutathione and Plant Tolerance to Various Abiotic Stresses 6. Ascorbate-Glutathione Related Redox Regulation in Plant Stress Tolerance 7. Detoxification of Heavy Metal Induced Oxidative Stress in Plants – Enzymatic- and Non-Enzymatic Mechanisms—A Mini Review 8. Significance of Glutathione in Higher Plants for Combating Abiotic Stress-Effects. 9. Heavy Metals and Oxidative Stress in Plants. 10. Ascorbate and Glutathione: A Defence System Against Heavy Metal Stress in Plants. 11. The Role of Ascorbate Peroxidase and Glutathione in Higher Plants to Abiotic-Induced Oxidative Stress. 12. Defence Strategies of Plants Against UV-B-Induced Oxidative Stress 13. Role of Ascorbate-Glutathione During Salt Stress-Induced Oxidative Stress Tolerance in Plants. 14. Secondary Metabolites as Non-Enzymatic Plant Protectors from Oxidative Stress. 15. The Role of Ascorbate in Growth and Development of Cells During the Formation of Annual Rings in Coniferous Trees. 16. Modulation of Glutathione, its Redox Couple and Related Enzymes in Plants Under Abiotic Stresses. 17. Heavy Metals in Soil and Plants: An Overview of Arsenic, Cadmium, Chromium and Mercury. Subject Index.
Naser A. Anjum :- NASER A. ANJUM is Post-Doctoral Scientist at Centre for Environmental and Marine Studies (CESAM) & Department of Chemistry, University of Aveiro, Aveiro, Portugal. Dr. Anjum obtained Ph.D. in Botany from Hamdard University, New Delhi, India. Dr. Anjum’s research works are concerned with Molecular Plant Stress Physiology emphasizing the significance of plant mineral nutrients in abiotic stress tolerance. He has to his credit significant number of research publications. Dr. Anjum has also worked as Fellow and Associate of the University Grants Commission and the Council of Scientific & Industrial Research, Govt. of India, New Delhi, India and Agricultural Biotechnology Research Center (ABRC), Academia Sinica, Taiwan. Earlier, he was awarded the DS Kothari-Fellowship by the University Grants Commission, Govt. of India, New Delhi. The research of Dr. Anjum has been recognized internationally, and his name has been included in the 2009 Edition of Marquis Who’s Who in the World, USA.Altaf Ahmad :- ALTAF AHMAD – Assistant Professor at Hamdard University, New Delhi, India. Dr. Ahmad was awarded PhD (Botany) by Hamdard University, New Delhi, India. He worked out the biochemical basis of the role of sulphur nutrition in enhancing the content and quality of oil in the seeds of rapeseed-mustard and also identified two forms of nitrate reductase in leaves of mustard. Dr. Ahmad has been honoured with the INSA Medal for Young Scientist (2003), Prof. LSS Kumar Memorial Award (2003) of INSA, AAAS (Jr) Award (2003) and Young Scientist Award (2004) of CST, Uttar Pradesh, India. He has to his credit significant research publications and several edited volumes published by reputed publishers.Shahid Umar :- SHAHID UMAR is Associate Professor at Hamdard University, New Delhi, India. Dr. Umar obtained Masters and Ph.D. in Botany from Aligarh Muslim University, Aligarh, India. He has research experience of 24 years including his incredible 10-years service as ‘Plant Physiologist’ at the Potash Research Institute of India, Gurgaon, India in the fields of ‘Plant nutrition and abiotic stress tolerance in crop plants’ including alleviation of nitrate toxicity in leafy vegetables, heavy metal toxicity, osmotic stress, nitrogen- and potassium-use-efficiency in selected field crops. Dr. Umar is a devoted researcher and has supervised theses for Ph.D. He has to his credit more than 100 significant research papers and 7 books published by reputed publishers. Dr. Umar is a regular reviewer of research manuscripts and is on the panel of editorial boards of journals of national and international repute, and is also a member of important national and international scientific societies. He has been awarded IPI-FAI, International Award (2003) instituted by International Potash Institute (IPI), Switzerland.