BookSudhakar Srivastava, Ashish K. Srivastava, Penna Suprasanna, editors.
Summary: Metal toxicity and deficiency are both common abiotic problems faced by plants. While metal contamination around the world is a critical issue, the bioavailability of some essential metals like zinc (Zn) and selenium (Se) can be seriously low in other locations. The list of metals spread in high concentrations in soil, water and air includes several toxic as well as essential elements, such as arsenic (As), cadmium (Cd), chromium (Cr), aluminum (Al), and selenium (Se). The problems for some metals are geographically confined, while for others, they are widespread. For instance, arsenic is an important toxic metalloid whose contamination in Southeast Asia and other parts of world is well documented. Its threats to human health via food consumption have generated immense interest in understanding plants responses to arsenic stress. Metals constitute crucial components of key enzymes and proteins in plants. They are important for the proper growth and development of plants. In turn, plants serve as sources of essential elements for humans and animals. Studies of their physiological effects on plants metabolism have led to the identification of crucial genes and proteins controlling metal uptake and transport, as well as the sensing and signaling of metal stresses. Plant-Metal Interactions sheds light on the latest development and research in analytical biology with respect to plant physiology. More importantly, it showcases the positive and negative impacts of metals on crop plants growth and productivity.
Contents:
Intro; Preface; Contents; An Integrated Transcriptomic, Proteomic, and Metabolomic Approach to Unravel the Molecular Mechanisms of Metal Stress Tolerance in Plants; 1 Introduction; 2 Heavy Metal-Induced Nutritional and Water-Deficit Stresses; 2.1 Nutritional Stress in Metal-Exposed Plants; 2.2 Water Stress in Metal-Exposed Plants; 3 Role of Thiol- and Non-thiol Compounds and Metal(loid) Chelation; 3.1 Phytochelatins and Their Induction; 3.2 Biosynthesis of PCs and Variations (Homo-PCs, Hydroxymethyl-PCs, and Iso-PCs); 3.3 Mode of Action of PCs 3 Heavy Metal-Induced Oxidative Damage in Plants4 Signaling Response Under Heavy Metal Stress; 4.1 Signal Transduction; 4.2 Protein Metabolism; 4.3 Functional Genomics; 4.4 miRNA-Based Regulation; 5 Conclusion and Future Outlook; References; Heavy Metal Toxicity and Plant Productivity: Role of Metal Scavengers; 1 Heavy Metal Toxicity: An Oxidative Challenge; 2 Non-protein Thiols: Key Metabolites in Heavy Metal Scavenging; 3 The Role of Proline and Glycine Betaine in Improving Heavy Metal Stress Tolerance in Plants; 4 Concluding Comments; References 3.4 The Superfamily of Metallothioneins: Classification and Structure of Metallothioneins3.5 Expression of MT Genes; 3.6 Metal(loid) Specificity and Chelation; 3.7 Functions of MTs; 4 Heavy Metal Stress Tolerance at Molecular Level: Omics Approach; 4.1 Transcriptomics; 4.2 Proteomics; 4.3 Metabolomics; 5 Conclusions and the Way Forward; References; Molecular Mechanism and Signaling Response of Heavy Metal Stress Tolerance in Plants; 1 Introduction; 2 Heavy Metal Ion Uptake and Translocation; 2.1 Factors Influencing Metal Uptake; 2.2 Sequestration of Heavy Metals and Compartmentalization 5 ConclusionsLiterature; Heavy Metal Hyperaccumulator Plants: The Resource to Understand the Extreme Adaptations of Plants Towards Heavy Metals; 1 Introduction; 2 Response of Hyperaccumulator to Metals; 2.1 Metal Uptake by Roots of Hyperaccumulator Plants; 2.2 Metal Accumulation in Hyperaccumulator Plants; 2.2.1 Metal-Binding Proteins; 2.2.2 Phytochelatins; 2.2.3 Metal Chelation by Small Molecules; 3 Long-Distance Transport of Metal Ions in Hyperaccumulator Plants; 4 Intracellular Partitioning and Subcellular Transport of Metals in Plants Cadmium (Cd): An Emerging Regulatory Metal with Critical Role in Cell Signalling and Plant Morphogenesis1 Cadmium in Nature; 2 The Uptake and Distribution of Cadmium in Plants; 2.1 Cd in Plant Organs; 2.2 Cd Transporters, Mechanisms of Translocation and Final Distribution; 3 Toxicity to Plants; 3.1 The Impact on Plant Anatomy, Morphogenesis and Development; 3.2 Cd/Zn and Cd/Fe Interactions; 3.3 Can Cd be advantageous to Plants?; 4 Cadmium Signalling; 4.1 ROS, NO and Hormones; 4.2 Ethylene; 4.3 Jasmonic Acid; 4.4 Salicylic Acid; 4.5 Brassinosteroids; 4.6 Abscisic Acid; 4.7 microRNAs