A Guide To The Polyamines

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A Guide to the Polyamines

Author : Seymour Stanley Cohen
Publisher : Oxford University Press, USA
ISBN 13 :
Total Pages : 632 pages
Book Rating : 4.3/5 (91 download)

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Book Synopsis A Guide to the Polyamines by : Seymour Stanley Cohen

Download or read book A Guide to the Polyamines written by Seymour Stanley Cohen and published by Oxford University Press, USA. This book was released on 1998 with total page 632 pages. Available in PDF, EPUB and Kindle. Book excerpt: The polyamines are ubiquitous and essential organic cations in prokaryotic and eukaryotic cells. This book is a comprehensive survey of the development of knowledge of their physiological and structural roles. Currently, the genetic and regulatory determinants of the amines and their cellular composition are being explored actively as parameters of normal physiology and aberrant pathologies. Cancer, virus infection, and protozoan parasitism are major examples of the later groups. Studies of the control of polyamine metabolism are providing important therapeutic leads. Further, the structural roles of the amines are being determined at molecular levels, contributing to the understanding of polynucleotide and protein organization and interaction, as well as to the solution of problems of genome transfer. These subjects describe a burgeoning biochemical area involving compounds whose roles in cytoplasmic and nuclear function include numerous aspects of organelle structure, polymer synthesis, and interactions.

Polyamine Cell Signaling

Author : Jian-Ying Wang
Publisher : Springer Science & Business Media
ISBN 13 : 1597451452
Total Pages : 490 pages
Book Rating : 4.5/5 (974 download)

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Book Synopsis Polyamine Cell Signaling by : Jian-Ying Wang

Download or read book Polyamine Cell Signaling written by Jian-Ying Wang and published by Springer Science & Business Media. This book was released on 2007-11-19 with total page 490 pages. Available in PDF, EPUB and Kindle. Book excerpt: Polyamines are organic cations found in all eukaryotic cells and intimately involved in, and required for, distinct biological functions. An increasing body of evidence indicates that the regulation of cellular polyamines is a central convergence point for the multiple signaling pathways driving various cellular functions. Over the last decade, considerable progress has been made in und- standing the molecular functions of cellular polyamines. These significant findings provide a fundamental basis to not only define the exact role of polyamines in physiology, but also to develop new therapeutic approaches for cancers and other diseases. The major objective of this book is to provide a timely and long lasting guide for investigators in the fields of polyamines, physiology, pharmacology, and cancer research. It will provide a foundation based on research and address the potential for subsequent applications in clinical practice. Polyamine Cell Signaling: Physiology, Pharmacology, and Cancer Research is divided into four main parts: Part I: Polyamines in Signal Transduction of Cell Proliferation Part II: Polyamines in Cellular Signaling of Apoptosis, Carcinogenesis, and Cancer Therapy Part III: Polyamines in Cell Motility and Cell–Cell Interactions Part IV: Polyamine Homeostasis and Transport This book not only covers the current state-of-the-art findings relevant to cellular and molecular functions of polyamines, but also provides the underlying conceptual basis and knowledge regarding potential therapeutic targeting of polyamines and polyamine metabolism. These points are addressed by int- nationally recognized experts in their contributions to this book.

Emergency Response Guidebook

Author : U.S. Department of Transportation
Publisher : Simon and Schuster
ISBN 13 : 1626363765
Total Pages : 400 pages
Book Rating : 4.6/5 (263 download)

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Book Synopsis Emergency Response Guidebook by : U.S. Department of Transportation

Download or read book Emergency Response Guidebook written by U.S. Department of Transportation and published by Simon and Schuster. This book was released on 2013-06-03 with total page 400 pages. Available in PDF, EPUB and Kindle. Book excerpt: Does the identification number 60 indicate a toxic substance or a flammable solid, in the molten state at an elevated temperature? Does the identification number 1035 indicate ethane or butane? What is the difference between natural gas transmission pipelines and natural gas distribution pipelines? If you came upon an overturned truck on the highway that was leaking, would you be able to identify if it was hazardous and know what steps to take? Questions like these and more are answered in the Emergency Response Guidebook. Learn how to identify symbols for and vehicles carrying toxic, flammable, explosive, radioactive, or otherwise harmful substances and how to respond once an incident involving those substances has been identified. Always be prepared in situations that are unfamiliar and dangerous and know how to rectify them. Keeping this guide around at all times will ensure that, if you were to come upon a transportation situation involving hazardous substances or dangerous goods, you will be able to help keep others and yourself out of danger. With color-coded pages for quick and easy reference, this is the official manual used by first responders in the United States and Canada for transportation incidents involving dangerous goods or hazardous materials.

Plant Polyamines

Author : Taku Takahashi
Publisher :
ISBN 13 : 9783039363193
Total Pages : 162 pages
Book Rating : 4.3/5 (631 download)

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Book Synopsis Plant Polyamines by : Taku Takahashi

Download or read book Plant Polyamines written by Taku Takahashi and published by . This book was released on 2020 with total page 162 pages. Available in PDF, EPUB and Kindle. Book excerpt: Polyamines are small organic compounds found in all living organisms. In recent years, there have been many exciting advances in our understanding of plant polyamines, such as the determination of the biosynthetic and catabolic pathways of plant polyamines and the identification of the roles that plant polyamines play in cellular processes. This Special Issue contains six original research papers and three review articles, providing valuable insights and information for future polyamine-related research.

Biology of the NMDA Receptor

Author : Antonius M. VanDongen
Publisher : CRC Press
ISBN 13 : 9781420044157
Total Pages : 350 pages
Book Rating : 4.0/5 (441 download)

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Book Synopsis Biology of the NMDA Receptor by : Antonius M. VanDongen

Download or read book Biology of the NMDA Receptor written by Antonius M. VanDongen and published by CRC Press. This book was released on 2008-10-29 with total page 350 pages. Available in PDF, EPUB and Kindle. Book excerpt: The NMDA receptor plays a critical role in the development of the central nervous system and in adult neuroplasticity, learning, and memory. Therefore, it is not surprising that this receptor has been widely studied. However, despite the importance of rhythms for the sustenance of life, this aspect of NMDAR function remains poorly studied. Written by one of the world’s leading authorities on NMDA receptors, Biology of the NMDA Receptor brings together virtually all the players in this important field.

Annual Plant Reviews, The Plant Hormone Ethylene

Author : Michael T. McManus
Publisher : John Wiley & Sons
ISBN 13 : 1444330039
Total Pages : 433 pages
Book Rating : 4.4/5 (443 download)

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Book Synopsis Annual Plant Reviews, The Plant Hormone Ethylene by : Michael T. McManus

Download or read book Annual Plant Reviews, The Plant Hormone Ethylene written by Michael T. McManus and published by John Wiley & Sons. This book was released on 2012-04-23 with total page 433 pages. Available in PDF, EPUB and Kindle. Book excerpt: The plant hormone ethylene is one of the most important, being one of the first chemicals to be determined as a naturally-occurring growth regulator and influencer of plant development. It was also the first hormone for which significant evidence was found for the presence of receptors. This important new volume in Annual Plant Reviews is broadly divided into three parts. The first part covers the biosynthesis of ethylene and includes chapters on S-adenosylmethionine and the formation and fate of ACC in plant cells. The second part of the volume covers ethylene signaling, including the perception of ethylene by plant cells, CTR proteins, MAP kinases and EIN2 / EIN3. The final part covers the control by ethylene of cell function and development, including seed development, germination, plant growth, cell separation, fruit ripening, senescent processes, and plant-pathogen interactions. The Plant Hormone Ethylene is an extremely valuable addition to Wiley-Blackwell's Annual Plant Reviews. With contributions from many of the world's leading researchers in ethylene, and edited by Professor Michael McManus of Massey University, this volume will be of great use and interest to a wide range of plant scientists, biochemists and chemists. All universities and research establishments where plant sciences, biochemistry, chemistry, life sciences and agriculture are studied and taught should have access to this important volume.

Reactive Polymers: Fundamentals and Applications

Author : Johannes Karl Fink
Publisher : William Andrew
ISBN 13 : 0128145102
Total Pages : 712 pages
Book Rating : 4.1/5 (281 download)

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Book Synopsis Reactive Polymers: Fundamentals and Applications by : Johannes Karl Fink

Download or read book Reactive Polymers: Fundamentals and Applications written by Johannes Karl Fink and published by William Andrew. This book was released on 2017-10-31 with total page 712 pages. Available in PDF, EPUB and Kindle. Book excerpt: Reactive Polymers: Fundamentals and Applications: A Concise Guide to Industrial Polymers, Third Edition introduces engineers and scientists to a range of reactive polymers and then details their applications and performance benefits. Basic principles and industrial processes are described for each class of reactive resin (thermoset), as well as additives, the curing process, applications and uses. The initial chapters are devoted to individual resin types (e.g., epoxides, cyanacrylates), followed by more general chapters on topics such as reactive extrusion and dental applications. Injection molding of reactive polymers, radiation curing, thermosetting elastomers, and reactive extrusion equipment are covered as well. The use of reactive polymers enables manufacturers to make chemical changes at a late stage in the production process, which, in turn, cause changes in performance and properties. Material selection and control of the reaction are essential to achieve optimal performance. Material new to this edition includes the most recent developments, applications and commercial products for each chemical class of thermosets, as well as sections on fabrication methods, reactive biopolymers, recycling of reactive polymers and case studies. Covers the basics and most recent developments, including reactive biopolymers, recycling of reactive polymers, nanocomposites and fluorosilicones Offers an indispensable guide for engineers and advanced students alike Provides extensive literature and patent review Reflects a thorough review of all literature published in this area since 2014 Features revised and updated chapters to reflect the latest research in reactive polymers

Plant Polyamines

Author : Taku Takahashi
Publisher : MDPI
ISBN 13 : 3039363182
Total Pages : 162 pages
Book Rating : 4.0/5 (393 download)

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Book Synopsis Plant Polyamines by : Taku Takahashi

Download or read book Plant Polyamines written by Taku Takahashi and published by MDPI. This book was released on 2020-06-17 with total page 162 pages. Available in PDF, EPUB and Kindle. Book excerpt: Polyamines are small organic compounds found in all living organisms. In recent years, there have been many exciting advances in our understanding of plant polyamines, such as the determination of the biosynthetic and catabolic pathways of plant polyamines and the identification of the roles that plant polyamines play in cellular processes. This Special Issue contains six original research papers and three review articles, providing valuable insights and information for future polyamine-related research.

Polyamines in Plant Biotechnology, Food Nutrition and Human Health

Author : Rubén Alcázar
Publisher : Frontiers Media SA
ISBN 13 : 2889636089
Total Pages : 292 pages
Book Rating : 4.8/5 (896 download)

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Book Synopsis Polyamines in Plant Biotechnology, Food Nutrition and Human Health by : Rubén Alcázar

Download or read book Polyamines in Plant Biotechnology, Food Nutrition and Human Health written by Rubén Alcázar and published by Frontiers Media SA. This book was released on 2020-03-24 with total page 292 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Advances in Rice Research for Abiotic Stress Tolerance

Author : Mirza Hasanuzzaman
Publisher : Woodhead Publishing
ISBN 13 : 0128143339
Total Pages : 986 pages
Book Rating : 4.1/5 (281 download)

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Book Synopsis Advances in Rice Research for Abiotic Stress Tolerance by : Mirza Hasanuzzaman

Download or read book Advances in Rice Research for Abiotic Stress Tolerance written by Mirza Hasanuzzaman and published by Woodhead Publishing. This book was released on 2018-11-12 with total page 986 pages. Available in PDF, EPUB and Kindle. Book excerpt: Advances in Rice Research for Abiotic Stress Tolerance provides an important guide to recognizing, assessing and addressing the broad range of environmental factors that can inhibit rice yield. As a staple food for nearly half of the world’s population, and in light of projected population growth, improving and increasing rice yield is imperative. This book presents current research on abiotic stresses including extreme temperature variance, drought, hypoxia, salinity, heavy metal, nutrient deficiency and toxicity stresses. Going further, it identifies a variety of approaches to alleviate the damaging effects and improving the stress tolerance of rice. Advances in Rice Research for Abiotic Stress Tolerance provides an important reference for those ensuring optimal yields from this globally important food crop. Covers aspects of abiotic stress, from research, history, practical field problems faced by rice, and the possible remedies to the adverse effects of abiotic stresses Provides practical insights into a wide range of management and crop improvement practices Presents a valuable, single-volume sourcebook for rice scientists dealing with agronomy, physiology, molecular biology and biotechnology

Plant polyamines in stress and development

Author : Rubén Alcázar
Publisher : Frontiers E-books
ISBN 13 : 2889193039
Total Pages : 141 pages
Book Rating : 4.8/5 (891 download)

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Book Synopsis Plant polyamines in stress and development by : Rubén Alcázar

Download or read book Plant polyamines in stress and development written by Rubén Alcázar and published by Frontiers E-books. This book was released on 2014-10-24 with total page 141 pages. Available in PDF, EPUB and Kindle. Book excerpt: Polyamines are small aliphatic polycations which have been involved in key stress and developmental processes in plants. In the recent years, compelling genetic and molecular evidences point to polyamines as essential metabolites required for resistance to drought, freezing, salinity, oxidative stress among other type of abiotic and biotic stresses. In addition to their role as stress-protective compounds, polyamines participate in key developmental processes mediated by specific signaling pathways or in cross-regulation with other plant hormones. Our Research Topic aims to integrate the multiple stress and developmental regulatory functions of polyamines in plants under a genetic, molecular and evolutionary perspective with special focus on signaling networks, mechanisms of action and metabolism regulation.

A Guide to Human Gene Therapy

Author : Roland W. Herzog
Publisher : World Scientific
ISBN 13 : 9814280917
Total Pages : 415 pages
Book Rating : 4.8/5 (142 download)

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Book Synopsis A Guide to Human Gene Therapy by : Roland W. Herzog

Download or read book A Guide to Human Gene Therapy written by Roland W. Herzog and published by World Scientific. This book was released on 2010 with total page 415 pages. Available in PDF, EPUB and Kindle. Book excerpt: 1. Non-viral gene therapy / Sean M. Sullivan -- 2. Adenoviral vectors / Stuart A. Nicklin and Andrew H. Baker -- 3. Retroviral vectors and integration analysis / Cynthia C. Bartholomae [und weitere] -- 4. Lentiviral vectors / Janka Matrai, Marinee K.L. Chuah and Thierry VandenDriessche -- 5. Herpes simplex virus vectors / William F. Goins [und weitere] -- 6. Adeno-Associated Viral (AAV) vectors / Nicholas Muzyczka -- 7. Regulatory RNA in gene therapy / Alfred. S. Lewin -- 8. DNA integrating vectors (Transposon, Integrase) / Lauren E. Woodard and Michele P. Calos -- 9. Homologous recombination and targeted gene modification for gene therapy / Matthew Porteus -- 10. Gene switches for pre-clinical studies in gene therapy / Caroline Le Guiner [und weitere] -- 11. Gene therapy for central nervous system disorders / Deborah Young and Patricia A. Lawlor -- 12. Gene therapy of hemoglobinopathies / Angela E. Rivers and Arun Srivastava -- 13. Gene therapy for primary immunodeficiencies / Aisha Sauer, Barbara Cassani and Alessandro Aiuti -- 14. Gene therapy for hemophilia / David Markusic, Babak Moghimi and Roland Herzog -- 15. Gene therapy for obesity and diabetes / Sergei Zolotukhin and Clive H. Wasserfall -- 16. Gene therapy for Duchenne muscular dystrophy / Takashi Okada and Shin'ichi Takeda -- 17. Cancer gene therapy / Kirsten A.K. Weigel-Van Aken -- 18. Gene therapy for autoimmune disorders / Daniel F. Gaddy, Melanie A. Ruffner and Paul D. Robbins -- 19. Gene therapy for inherited metabolic storage diseases / Cathryn Mah -- 20. Retinal diseases / Shannon E. Boye, Sanford L. Boye and William W. Hauswirth -- 21. A brief guide to gene therapy treatments for pulmonary diseases / Ashley T. Martino, Christian Mueller and Terence R. Flotte -- 22. Cardiovascular disease / Darin J. Falk, Cathryn S. Mah and Barry J. Byrne

Protective Chemical Agents in the Amelioration of Plant Abiotic Stress

Author : Aryadeep Roychoudhury
Publisher : John Wiley & Sons
ISBN 13 : 111955165X
Total Pages : 704 pages
Book Rating : 4.1/5 (195 download)

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Book Synopsis Protective Chemical Agents in the Amelioration of Plant Abiotic Stress by : Aryadeep Roychoudhury

Download or read book Protective Chemical Agents in the Amelioration of Plant Abiotic Stress written by Aryadeep Roychoudhury and published by John Wiley & Sons. This book was released on 2020-05-20 with total page 704 pages. Available in PDF, EPUB and Kindle. Book excerpt: A guide to the chemical agents that protect plants from various environmental stressors Protective Chemical Agents in the Amelioration of Plant Abiotic Stress offers a guide to the diverse chemical agents that have the potential to mitigate different forms of abiotic stresses in plants. Edited by two experts on the topic, the book explores the role of novel chemicals and shows how using such unique chemical agents can tackle the oxidative damages caused by environmental stresses. Exogenous application of different chemical agents or chemical priming of seeds presents opportunities for crop stress management. The use of chemical compounds as protective agents has been found to improve plant tolerance significantly in various crop and non-crop species against a range of different individually applied abiotic stresses by regulating the endogenous levels of the protective agents within plants. This important book: Explores the efficacy of various chemical agents to eliminate abiotic stress Offers a groundbreaking look at the topic and reviews the most recent advances in the field Includes information from noted authorities on the subject Promises to benefit agriculture under stress conditions at the ground level Written for researchers, academicians, and scientists, Protective Chemical Agents in the Amelioration of Plant Abiotic Stress details the wide range of protective chemical agents, their applications, and their intricate biochemical and molecular mechanism of action within the plant systems during adverse situations.

Polyamine Metabolism in Disease and Polyamine-Targeted Therapies

Author : Tracy Murray-Stewart
Publisher : MDPI
ISBN 13 : 3039211528
Total Pages : 240 pages
Book Rating : 4.0/5 (392 download)

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Book Synopsis Polyamine Metabolism in Disease and Polyamine-Targeted Therapies by : Tracy Murray-Stewart

Download or read book Polyamine Metabolism in Disease and Polyamine-Targeted Therapies written by Tracy Murray-Stewart and published by MDPI. This book was released on 2019-10-01 with total page 240 pages. Available in PDF, EPUB and Kindle. Book excerpt: Polyamines are ubiquitous polycations essential for all cellular life. The most common polyamines in eukaryotes, spermine, spermidine, and putrescine, exist in millimolar intracellular concentrations that are tightly regulated through biosynthesis, catabolism, and transport. Polyamines interact with, and regulate, negatively charged macromolecules, including nucleic acids, proteins, and ion channels. Accordingly, alterations in polyamine metabolism affect cellular proliferation and survival through changes in gene expression and transcription, translation, autophagy, oxidative stress, and apoptosis. Dysregulation of these multifaceted polyamine functions contribute to multiple disease processes, thus their metabolism and function have been targeted for preventive or therapeutic intervention. The correlation between elevated polyamine levels and cancer is well established, and ornithine decarboxylase, the rate-limiting biosynthetic enzyme in the production of putrescine, is a bona fide transcriptional target of the Myc oncogene. Furthermore, induced polyamine catabolism contributes to carcinogenesis that is associated with certain forms of chronic infection and/or inflammation through the production of reactive oxygen species. These and other characteristics specific to cancer cells have led to the development of polyamine-based agents and inhibitors aimed at exploiting the polyamine metabolic pathway for chemotherapeutic and chemopreventive benefit. In addition to cancer, polyamines are involved in the pathologies of neurodegenerative diseases including Alzheimer’s and Parkinson’s, parasitic and infectious diseases, wound healing, ischemia/reperfusion injuries, and certain age-related conditions, as polyamines are known to decrease with age. As in cancer, polyamine-based therapies for these conditions are an area of active investigation. With recent advances in immunotherapy, interest has increased regarding polyamine-associated modulation of immune responses, as well as potential immunoregulation of polyamine metabolism, the results of which could have relevance to multiple disease processes. The goal of this Special Issue of Medical Sciences is to present the most recent advances in polyamine research as it relates to health, disease, and/or therapy.

Polyamine Protocols

Author : David M. L. Morgan
Publisher : Springer Science & Business Media
ISBN 13 : 1592595650
Total Pages : 173 pages
Book Rating : 4.5/5 (925 download)

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Book Synopsis Polyamine Protocols by : David M. L. Morgan

Download or read book Polyamine Protocols written by David M. L. Morgan and published by Springer Science & Business Media. This book was released on 2008-02-02 with total page 173 pages. Available in PDF, EPUB and Kindle. Book excerpt: A unique collection of hands-on enzyme assay techniques to study polyamines and their function. The techniques range from assay methods for enzymes of polyamine biosynthesis and catabolism to measurements of polyamines, polyamine transport, and polyamine effects on cell growth. The methods are presented by leading researchers who have perfected them to a high art, and include clear, step-by-step instructions with numerous hints and tips to ensure readily reproducible results.

Plant Performance Under Environmental Stress

Author : Azamal Husen
Publisher : Springer Nature
ISBN 13 : 3030785211
Total Pages : 604 pages
Book Rating : 4.0/5 (37 download)

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Book Synopsis Plant Performance Under Environmental Stress by : Azamal Husen

Download or read book Plant Performance Under Environmental Stress written by Azamal Husen and published by Springer Nature. This book was released on 2021-08-23 with total page 604 pages. Available in PDF, EPUB and Kindle. Book excerpt: Global climate change is bound to create a number of abiotic and biotic stresses in the environment, which would affect the overall growth and productivity of plants. Like other living beings, plants have the ability to protect themselves by evolving various mechanisms against stresses, despite being sessile in nature. They manage to withstand extremes of temperature, drought, flooding, salinity, heavy metals, atmospheric pollution, toxic chemicals and a variety of living organisms, especially viruses, bacteria, fungi, nematodes, insects and arachnids and weeds. Incidence of abiotic stresses may alter the plant-pest interactions by enhancing susceptibility of plants to pathogenic organisms. These interactions often change plant response to abiotic stresses. Plant growth regulators modulate plant responses to biotic and abiotic stresses, and regulate their growth and developmental cascades. A number of physiological and molecular processes that act together in a complex regulatory network, further manage these responses. Crosstalk between autophagy and hormones also occurs to develop tolerance in plants towards multiple abiotic stresses. Similarly, biostimulants, in combination with correct agronomic practices, have shown beneficial effects on plant metabolism due to the hormonal activity that stimulates different metabolic pathways. At the same time, they reduce the use of agrochemicals and impart tolerance to biotic and abiotic stress. Further, the use of bio- and nano-fertilizers seem to hold promise to improve the nutrient use efficiency and hence the plant yield under stressful environments. It has also been shown that the seed priming agents impart stress tolerance. Additionally, tolerance or resistance to stress may also be induced by using specific chemical compounds such as polyamines, proline, glycine betaine, hydrogen sulfide, silicon, β-aminobutyric acid, γ-aminobutyric acid and so on. This book discusses the advances in plant performance under stressful conditions. It should be very useful to graduate students, researchers, and scientists in the fields of botanical science, crop science, agriculture, horticulture, ecological and environmental science.

Reactive Oxygen Species in Plant Signaling

Author : Luis A. del Río
Publisher : Springer Science & Business Media
ISBN 13 : 3642003907
Total Pages : 245 pages
Book Rating : 4.6/5 (42 download)

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Book Synopsis Reactive Oxygen Species in Plant Signaling by : Luis A. del Río

Download or read book Reactive Oxygen Species in Plant Signaling written by Luis A. del Río and published by Springer Science & Business Media. This book was released on 2009-06-22 with total page 245 pages. Available in PDF, EPUB and Kindle. Book excerpt: Oxygen (O ) appeared in significant amounts in the Earth’s atmosphere over 2. 2 2 billion years ago, largely due to the evolution of photosynthesis by cyanobacteria (Halliwell 2006). The O molecule is a free radical, as it has two impaired electrons 2 that have the same spin quantum number. This spin restriction makes O prefer to 2 accept its electrons one at a time, leading to the generation of the so-called reactive oxygen species (ROS). The chemical nature of these species dictates that they can create damage in cells. This has contributed to the creation of the “oxidative stress” concept; in this view, ROS are unavoidable toxic products of O metabolism and 2 aerobic organisms have evolved antioxidant defences to protect against this tox- ity (Halliwell 1981; Fridovich 1998). Indeed, even in present-day plants, which are full of antioxidants, much of the protein synthetic activity of chloroplasts is used to replace oxidatively damaged D1 and other proteins (Halliwell 2006). Yet, the use of the “oxidative stress” term implies that ROS exert their effects through indiscriminate widespread inactivation of cellular functions. In this context, ROS must not be able to react with lipids, proteins or nucleic acids in order to avoid any damage to vital cellular components. However, genetic evidence has suggested that, in planta, purely physicoche- cal damage may be more limited than previously thought (Foyer and Noctor 2005).