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Antioxidants and antioxidant enzymes in higher plants

Author: Dharmendra Kumar Gupta, (Phytoremediation researcher); José M Palma; Francisco J Corpas
Publisher: Cham, Switzerland : Springer, [2018]
Edition/Format:   eBook : Document : EnglishView all editions and formats
Summary:
This book provides an overview of antioxidants and antioxidant enzymes and their role in the mechanisms of signaling and cellular tolerance under stress in plant systems. Major reactive oxygen species (ROS)-scavenging/modulating enzymes include the superoxide dismutase (SOD) that dismutates O2 into H2O2, which is followed by the coordinated action of a set of enzymes including catalase (CAT), ascorbate peroxidase  Read more...
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Genre/Form: Electronic books
Additional Physical Format: Printed edition:
Material Type: Document, Internet resource
Document Type: Internet Resource, Computer File
All Authors / Contributors: Dharmendra Kumar Gupta, (Phytoremediation researcher); José M Palma; Francisco J Corpas
ISBN: 9783319750880 3319750887
OCLC Number: 1029078181
Description: 1 online resource (xiii, 300 pages)
Contents: Plant superoxide dismutases: Function under abiotic stress conditions --
Studies of catalase in plants under abiotic stress --
Ascorbate peroxidase functions in higher plants: The control of the balance between oxidative damage and signaling --
Glutathione reductase: Safeguarding plant cells against oxidant damage --
Function of the various MDAR isoforms in higher plants --
Peroxiredoxins: Types, characteristics and functions in higher plants --
Redox protein thioredoxins: Function under salinity, drought and extreme temperature conditions --
Biosynthesis and regulation of ascorbic acid in plants --
Glutathione metabolism and its function in higher plants adapting to stress --
Revisiting carotenoids and their role in plant stress responses: From biosynthesis to plant signaling mechanisms during stress. Abiotic stress response in plants --
the relevance of tocopherols --
Role of flavonoids in plant stress. Class III peroxidases: isoenzymes functions, localization and redox regulation.
Responsibility: Dharmendra K. Gupta, José M. Palma, Francisco J. Corpas, editors.

Abstract:

This book provides an overview of antioxidants and antioxidant enzymes and their role in the mechanisms of signaling and cellular tolerance under stress in plant systems. Major reactive oxygen species (ROS)-scavenging/modulating enzymes include the superoxide dismutase (SOD) that dismutates O2 into H2O2, which is followed by the coordinated action of a set of enzymes including catalase (CAT), ascorbate peroxidase (APX), glutathione peroxidase (GPX) and peroxiredoxins (Prx) that remove H2O2. In addition to the ROS scavenging enzymes, a number of other enzymes are found in various subcellular compartments, which are involved in maintaining such redox homeostasis either by directly scavenging particular ROS and ROS-byproducts or by replenishing antioxidants. In that respect, these enzymes can be also considered antioxidants. Such enzymes include monodehydroascorbate reductase (MDAR), dehydroascorbate reductase (DHAR), glutathione reductase (GR), alternative oxidases (AOXs), peroxidases (PODs) and glutathione S-transferases (GSTs). Some non-enzymatic antioxidants, such as ascorbic acid (vitamin C), carotenes (provitamin A), tocopherols (vitamin E), and glutathione (GSH), work in concert with antioxidant enzymes to sustain an intracellular steady-state level of ROS that promotes plant growth, development, cell cycles and hormone signaling, and reinforces the responses to abiotic and biotic environmental stressors. Offering a unique compilation of information on antioxidants and antioxidant enzymes, this is a valuable resource for advanced students and researchers working on plant biochemistry, physiology, biotechnology, and signaling in cell organelles, and those specializing in plant enzyme technology.

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