The Luteoviridae
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The Luteoviridae
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Author : Hugh Barker
language : en
Publisher: Oxford University Press, USA
Release Date : 1999
The Luteoviridae written by Hugh Barker and has been published by Oxford University Press, USA this book supported file pdf, txt, epub, kindle and other format this book has been release on 1999 with Nature categories.
This book provides a comprehensive review of all current knowledge of the Luteoviridae. These viruses cause severe economic losses of important food crops worldwide, and have some unusual biological and molecular properties, which are discussed. The topics covered range from the reclassification, structure, diversity and genetics of luteoviruses, to their transmission and interaction with vectors, techniques for diagnosis, development of virus resistant plants, epidemiology and control. This book is essential reading for advanced students and researchers in virology and plant pathology.
Molecular Detection Of The Luteoviridae
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Author : Anastasija Chomic̆
language : en
Publisher:
Release Date : 2011
Molecular Detection Of The Luteoviridae written by Anastasija Chomic̆ and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2011 with Luteoviridae categories.
The Plant Viruses
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Author : B.D. Harrison
language : en
Publisher: Springer Science & Business Media
Release Date : 2013-06-29
The Plant Viruses written by B.D. Harrison and has been published by Springer Science & Business Media this book supported file pdf, txt, epub, kindle and other format this book has been release on 2013-06-29 with Science categories.
This fifth volume in the series The Plant Viruses, dealing with viruses with bipartite genomes, completes the coverage of viruses with isometric parti cles and genomes consisting of single-stranded, positive-sense RNA: viruses that have tripartite and monopartite genomes of this kind were dealt with in Volumes 1 and 3, respectively. How close are the affinities among the viruses within the groupings distinguished in this way? All those with tripartite genomes are considered to be sufficiently closely related to be included in the family Bromoviridae, whereas the monopartite-genome viruses covered in Volume 3 clearly are a much more diverse collection. Affinities among the viruses with bipartite genomes are considered in Chapter 1 of this volume, along with the possible origins, advantages, and disadvantages of these ge nomes. The conclusion reached from this assessment is that the bipartite genome viruses fall into four categories, those within each category having closer affinities with viruses not included in this book than with viruses in the other categories. No evidence was found that possession of a bipartite genome gives a virus overwhelming advantages over viruses of other sorts. More probably, any advantages are largely balanced by disadvantages, and bipartite genomes may be best considered simply as an alternative design for the hereditary material of a virus.
The Enigmatic Role Of Orf 6 Of Barley Yellow Dwarf Virus
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Author : Aurélie Mamisoa Rakotondrafara
language : en
Publisher:
Release Date : 2002
The Enigmatic Role Of Orf 6 Of Barley Yellow Dwarf Virus written by Aurélie Mamisoa Rakotondrafara and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2002 with categories.
Barley yellow dwarf virus (BYDV, Luteoviridae) RNA harbors a highly variable open reading frame (ORF6) of unknown function in its 3'end. ORF6 is encoded by its potential mRNA, subgenomic RNA 2 (sgRNA2) that may serve as a ribo-regulator in the switch from early gene expression to late gene expression during BYDV infection (Wang et al., 1999). It is well-translated in wheat germ extract in vitro system (Wang et al., 1999) and expresses a 4.3 to 7.2 kDa protein (P6) depending on the virus isolate. ORF6 sequence is not shared with any other members of the Luteoviridae. The lack of homology to any known protein, with its high sequence variability, might suggest the irrelevance of P6. However, the alignment of ORF6 sequences of several BYDV isolates showed that the variation of the nucleotides at the wobble position allows the conservation of at least the first ten amino acids. That supports the idea of P6 expression although it has yet to be detected in plants. The main goal of my research was (a) to detect P6 in infected protoplasts and (b) to investigate the function of ORF6 at the RNA level by focusing on the importance of sgRNA2 in virus-host interaction and the cis-acting role of ORF6 sequence in viral replication and translation. We found that although well-translated in vitro, P6 was not detected in oat protoplasts. According to our model, the lack of possible interaction between the 5'-3' ends of sgRNA2, a prerequisite for translation initiation in vivo but not in vitro, does not favor ORF6 translation in vivo. It is ORF6 sequence, rather than its encoded protein, that plays a role in BYDV infection as a cis-acting control of replication but not translation.
Plant Virology
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Author : Roger Hull
language : en
Publisher: Elsevier
Release Date : 2001-10-03
Plant Virology written by Roger Hull and has been published by Elsevier this book supported file pdf, txt, epub, kindle and other format this book has been release on 2001-10-03 with Science categories.
It has been ten years since the publication of the third edition of this seminal text on plant virology, during which there has been an explosion of conceptual and factual advances. The fourth edition updates and revises many details of the previous editon, while retaining the important older results that constitute the field's conceptual foundation. Key features of the fourth edition include:* Thumbnail sketches of each genera and family groups* Genome maps of all genera for which they are known* Genetic engineered resistance strategies for virus disease control* Latest understanding of virus interactions with plants, including gene silencing* Interactions between viruses and insect, fungal, and nematode vectors* New plate section containing over 50 full-color illustrations
Poleroviruses
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Author : Julia De Cillia
language : en
Publisher:
Release Date : 2011
Poleroviruses written by Julia De Cillia and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2011 with categories.
RNA silencing is a major antiviral defense mechanism in plants. Viral double-stranded RNAs are cleaved into siRNA duplexes by Dicer proteins and subsequently incorporated into the RNA induced silencing complex (RISC), which guides sequence specific degradation of homologous RNAs. In order to counteract this plant defense, most plant viruses evolved silencing suppressor proteins.Poleroviruses, a group of single-stranded RNA plant viruses belonging to the Luteoviridae family, encode the strong silencing suppressor P0. This protein interacts with plant SKP-like proteins through an F-box-like motif, which appears important for its function. Recently, it was demonstrated that P0 destabilizes ARGONAUTE (AGO) proteins, key members of RISC. Their degradation leads to the inhibition of the silencing mechanism.In this work we designed several mutants of P0 proteins from two different poleroviruses. The mutant proteins were tested for their silencing suppressor activity, SKP interaction, their ability to induce AGO destabilization and their subcellular localization. These experiments allowed to determine several domains required for P0's function and revealed striking differences between the two P0 proteins.The particular phloem-limited tropism of the Luteoviridae was analyzed in the second part of this thesis. The use of transgenic Arabidopsis plants, expressing a full-length Turnip yellows virus cDNA clone under the control of the constitutive 35S promoter, led to interesting conclusions regarding the silencing response induced against poleroviruses. The results presented here also raise questions about the mechanism of subgenomic RNA synthesis.
Issues In Life Sciences Botany And Plant Biology Research 2011 Edition
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Author :
language : en
Publisher: ScholarlyEditions
Release Date : 2012-01-09
Issues In Life Sciences Botany And Plant Biology Research 2011 Edition written by and has been published by ScholarlyEditions this book supported file pdf, txt, epub, kindle and other format this book has been release on 2012-01-09 with Science categories.
Issues in Life Sciences: Botany and Plant Biology Research: 2011 Edition is a ScholarlyEditions™ eBook that delivers timely, authoritative, and comprehensive information about Life Sciences—Botany and Plant Biology Research. The editors have built Issues in Life Sciences: Botany and Plant Biology Research: 2011 Edition on the vast information databases of ScholarlyNews.™ You can expect the information about Life Sciences—Botany and Plant Biology Research in this eBook to be deeper than what you can access anywhere else, as well as consistently reliable, authoritative, informed, and relevant. The content of Issues in Life Sciences: Botany and Plant Biology Research: 2011 Edition has been produced by the world’s leading scientists, engineers, analysts, research institutions, and companies. All of the content is from peer-reviewed sources, and all of it is written, assembled, and edited by the editors at ScholarlyEditions™ and available exclusively from us. You now have a source you can cite with authority, confidence, and credibility. More information is available at http://www.ScholarlyEditions.com/.
Encyclopedia Of Toxicology
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Author : Philip Wexler
language : en
Publisher: Academic Press
Release Date : 2005
Encyclopedia Of Toxicology written by Philip Wexler and has been published by Academic Press this book supported file pdf, txt, epub, kindle and other format this book has been release on 2005 with Medical categories.
The Encyclopedia of Toxicology second edition continues its comprehensive survey of toxicology. This new edition presents entries devoted to specific chemicals, the international scope of organizations included has been broadened, and articles describing a number of well-known toxic-related incidents such as Chernobyl and Three-Mile Island are included. Along with the traditional scientifically-based entries, new articles focus on the societal implications of toxicological knowledge including environmental crimes, chemical and biological warfare in ancient times, and a history of the U.S. environmental movement. With more than 1150 entries, this second edition has been expanded in length, breadth and depth and provides an extensive overview of the many facets of toxicology. (Midwest).
Recoding Expansion Of Decoding Rules Enriches Gene Expression
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Author : John F. Atkins
language : en
Publisher: Springer Science & Business Media
Release Date : 2010-03-10
Recoding Expansion Of Decoding Rules Enriches Gene Expression written by John F. Atkins and has been published by Springer Science & Business Media this book supported file pdf, txt, epub, kindle and other format this book has been release on 2010-03-10 with Science categories.
The literature on recoding is scattered, so this superb book ?lls a need by prov- ing up-to-date, comprehensive, authoritative reviews of the many kinds of recoding phenomena. Between 1961 and 1966 my colleagues and I deciphered the genetic code in Escherichia coli and showed that the genetic code is the same in E. coli, Xenopus laevis, and guinea pig tissues. These results showed that the code has been c- served during evolution and strongly suggested that the code appeared very early during biological evolution, that all forms of life on earth descended from a c- mon ancestor, and thus that all forms of life on this planet are related to one another. The problem of biological time was solved by encoding information in DNA and retrieving the information for each new generation, for it is easier to make a new organism than it is to repair an aging, malfunctioning one. Subsequently, small modi?cations of the standard genetic code were found in certain organisms and in mitochondria. Mitochondrial DNA only encodes about 10–13 proteins, so some modi?cations of the genetic code are tolerated that pr- ably would be lethal if applied to the thousands of kinds of proteins encoded by genomic DNA.
Practical Guide To The Identification Of Selected Diseases Of Wheat And Barley
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Author : L. Gilchrist-Saavedra
language : en
Publisher: CIMMYT
Release Date : 1997
Practical Guide To The Identification Of Selected Diseases Of Wheat And Barley written by L. Gilchrist-Saavedra and has been published by CIMMYT this book supported file pdf, txt, epub, kindle and other format this book has been release on 1997 with categories.