Plant RNA Viruses: Molecular Pathogenesis and Management provides wide-ranging coverage on the recognition and signaling events between plants and RNA viruses. The book examines the molecular biology of signaling, host-virus interaction, RNA virus diversity, and how plants and cellular pathogens interact. Sections cover Virus Diversity and Diagnosis, Virus-Host Interactions and Virus Management. Specific chapters discuss classification and nomenclature of viruses, detail the molecular characteristics of viral genomes, highlight the viral manipulation of cellular key regulatory systems for successful virus infection, and discuss the movement of plant viruses into plant cells. Additional topics include RNA plant viruses and host interaction, detection and diversity of plant RNA viruses, and strategies for combating and management of plant viruses. With contributions from an international group of experts, the book is a comprehensive reference for those in research, academia, industry and anybody engaging in the study of plant viruses at the molecular level. - Provides an overview of virus genome and nomenclature - Covers plant virus biodiversity and ecology, diversity mechanisms and opportunities - Examines Plant Host-Virus Interaction - Discusses virus-vector interaction and transmission - Offers strategies for virus management, both traditional and modern

Biochemical studies on plant virus RNA replication have advanced considerably since 2000, primarily because of new genetic, molecular, biochemical, and enzymatic studies. This book generates understanding of multiplication of plus-sense RNA plant viruses, especially at molecular level. Certain virus-encoded essential proteins, nucleotide sequence motifs, and RNA secondary structures are central to virus RNA replication, which has a number of stages. Each is a complex phenomenon requiring specific factors and conditions.

There has been recent rapid progress in the transformation of plants with foreign DNA, making use either of the natural routes of genetic invasion that viruses and bacteria have developed, or of chemical, mechanical and electrical tricks to make plant protoplast membranes permeable to nucleic acids. Genes integrated into plant virus genomes can be carried systemi cally from the initial site of infection into the rest of the plant. Genes placed between the borders of Agrobacterium tumefaciens T-DNA can be transferred into single cells or plant tissue, which then divides to produce wound calli, or as in the case of an Agrobacterium rhizogenes infection, grow out into new roots. Calli and roots can be grown into whole plants. If virus genomes are placed between the T-DNA borders, a very effective infectious route, termed "agroinfection", is established. Once inside a pro toplast, DNA finds its way into the nucleus where it can finally integrate into the resident chromosome and be expressed. Whether it can also find its way into chloroplasts is not yet clear, but at least translation products can be targeted into this organelle. Regeneration of whole organisms from single cells is a special feature of plants and offers a unique tool to study genes in a multicellular organism. In addition, as in animal cells, transcription and translation of trans forming genes can be studied in plant cells during "transient expression".

The time seems ripe for a critical compendium of that segment of the biological universe we call viruses. Virology, as a science, having only recently passed through its descriptive phase of naming and num bering, has probably reached that stage at which relatively few new truly new-viruses will be discovered. Triggered by the intellectual probes and techniques of molecular biology, genetics, biochemical cytology, and high-resolution microscopy and spectroscopy, the field has experienced a genuine information explosion. Few serious attempts have so far been made to chronicle these events. This comprehensive series, which will comprise some 6000 pages in a total of about 22 volumes, represents a commitment by a large group of active investigators to analyze, digest, and expostulate on the great mass of data relating to viruses, much of which is now amorphous and disjointed and scattered throughout a wide literature. In this way, we hope to place the entire field in perspective as well as to develop an invaluable reference and sourcebook for researchers and students at all levels. This series is designed as a continuum that can be entered anywhere but which also provides a logical progression of developing facts and integrated concepts.

The book Virus and Plant Diseases provides thorough information about virus and vital plant diseases. It covers origin, evolution, phylogeny, history, occurrence, nature, structure, symmetry, reproduction and classification of virus. Major groups of plant pathogenic viruses and plant diseases are also discussed. The book illustrates the information explicit through 41 figures and 21 tables. At the end of the book several references are given for further study. The scope of virology is expanding so rapidly that it is impossible to present all of it in a book which a student new to the field can cover in a single course. We have, therefore, tried to present selected portions of virology in sufficient detail that the student can understand them through reading the book. The primary aim of the text book is to present a succinet account of the essential features of the virus in a form suitable for students. Efforts have been made to include only sound fundamental material to give the begineer a solid foundation for more advanced work on the subject. Emphasis is placed on thee use of chemistry for a clearer understanding of the composition of virusus and the reactions they produce. The book uses up-to-date examples to show how precise hypotheses may be formulated and tested experimentally. Special efforts have been made to explain ideas in non-mathematical terms. The primary aim throughout has been clarity, simplicity and the high standard. The book will definitely prove to be a boon to teachers, students and research workers in the related field. Contents: Introduction, Structure of Virus, Classification of Virus, Plant Viruses, Plant Viral Diseases.

Plant Virus-Host Interaction: Molecular Approaches and Viral Evolution, Second Edition, provides comprehensive coverage of molecular approaches for virus-host interaction. The book contains cutting-edge research in plant molecular virology, including pathogenic viroids and transport by insect vectors, interference with transmission to control viruses, synergism with pivotal coverage of RNA silencing, and the counter-defensive strategies used by viruses to overcome the silencing response in plants. This new edition introduces new, emerging proteins involved in host-virus interactions and provides in-depth coverage of plant virus genes' interactions with host, localization and expression. With contributions from leading experts, this is a comprehensive reference for plant virologists, molecular biologists and others interested in characterization of plant viruses and disease management. - Introduces new, emerging proteins involved during the host-virus interaction and new virus strains that invade new crops through recombination, resorting and mutation - Provides molecular approaches for virus-host interaction - Highlights RNA silencing and counter-defensive strategies for disease management - Discusses the socioeconomic implications of viral spread and mitigation techniques

Two decades ago, recombinant DNA technology or genetic engineering ushered in a new era in the study of plant viruses. The major breakthrough came in the eighties, primarily due to the development of new methods for RNA reverse transcription and cDNA cloning, along with restriction enzyme mapping and rapid nucleotide sequencing. An information explosion in various molecular aspects of plant viruses was caused by these studies. Current research efforts investigate the study of viral genomes, genetic maps, genes and gene expression, gene products, and genetic basis of virus functions and biological properties. Molecular Biology of Plant Viruses analyzes, collates and reviews such published information. Additionally, it demonstrates the mechanisms of genetic variability; brings out the molecular basis of virus transport in plants and of virus transmission by vectors and of disease symptomatology; and discusses molecular biology of viroids and transgenic plants. It also treats the recently discovered genetic phenomenon of gene silencing and the gene-for-gene interactions between the hosts and plant viruses. Molecular Biology of Plant Viruses is an excellent reference, providing insight into the exciting research developments made in the field.

This book is divided into five sections. The first section deals with the methodology and bioresource generation, techniques related to genetic engineering, and gene transfer to the nuclear genome and chloroplast genome. The new techniques of genome profiling and gene silencing are also presented. The second section of the book covers the classical aspect of plant biotechnology viz. tissue culture and micropropagation. Use of genetic engineering via Agrobacterium and direct transfer of DNA through particle bombardment to develop transformed plants in Artemisia, castor and orchids, and production of recombinant proteins in plant cells have been dealt with in the third section. The fourth section addresses the abiotic and biotic stress tolerance in plants. The basic biology of some of the stress responses, and designing plants for stress tolerance is discussed in this section. The fifth section examines medicinal plants and alkaloid production.

Plant viruses impose a serious threat on agriculture, which motivates extensive breeding efforts for viral resistant crops and inspires lasting interests on basic research to understand the mechanisms underlying plant immunity against viruses. Viruses are obligate intracellular parasites. Their genomes are usually small and only encode a few products that are essential to hijack host machinery for their nucleotide and protein biosynthesis, and that are necessary to suppress host immunity. Plants evolved multilayers of defense mechanisms to defeat viral infection. In this research topic, we gathered 13 papers covering recent advances in different aspects of plant immunity against viruses, including reviews on RNA silencing and R gene based immunity and their application, translational initiation factor mediated recessive resistance, genome editing based viral immunity, role of chloroplast in plant-virus interaction, and research articles providing new mechanistic insights on plant-virus interactions. We hope that this Research Topic helps readers to have a better understanding of the progresses that have been made recently in plant immunity against viruses. A deeper understanding of plant antiviral immunity will facilitate the development of innovative approaches for crop protections and improvements.

This book provides a comprehensive look at the field of plant virus evolution. It is the first book ever published on the topic. Individual chapters, written by experts in the field, cover plant virus ecology, emerging viruses, plant viruses that integrate into the host genome, population biology, evolutionary mechanisms and appropriate methods for analysis. It covers RNA viruses, DNA viruses, pararetroviruses and viroids, and presents a number of thought-provoking ideas.