Molecular Characterization of the Pseudomonas - Tomato Interaction PDF Download
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Author: Adriana Jimena Bernal
Publisher:
ISBN:
Category :
Languages : en
Pages : 484
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Book Description
Author: Adriana Jimena Bernal
Publisher:
ISBN:
Category :
Languages : en
Pages : 484
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Author: Jeffrey Herng Chang
Publisher:
ISBN:
Category :
Languages : en
Pages : 486
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Author: Christine Maria Kraus
Publisher:
ISBN:
Category :
Languages : en
Pages : 234
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Book Description
The use of natural variation is a powerful tool to study the evolution of plant resistance genes and pathogen effectors. In tomato, the Pto protein kinase interacts directly with two Pseudomonas syringae pv. tomato (Pst) effectors, AvrPto and AvrPtoB. This direct interaction is mediated by the binding of each effector through both a shared and a unique interface with Pto. The presence of two unique interfaces suggested that the recognition of these two effectors by Pto might have evolved independently. We conducted a screen of wild tomato accessions for their ability to mount effector-triggered immunity upon recognition of AvrPto or AvrPtoB to seek evidence of natural variation that would shed further light on how Pto-like kinases recognize and respond to two structurally different effectors. Our screen of wild relatives of tomatoes uncovered 22 accessions of Solanum chmielewskii (Schm) that recognize only AvrPtoB. Through further molecular characterization we found that a single histidine-to-aspartate substitution at position 193 in the activation domain of Schm Pto-2677 was sufficient to confer recognition of AvrPto in plant cells. The reciprocal substitution of aspartate-to-histidine-193 in Pto abolished AvrPto recognition, confirming the importance of this residue for signaling in response to AvrPto. Our results reveal that there are not only distinct binding interfaces involved in the Pto response to these effectors, but that there is also a difference in downstream signaling. Based on recent worldwide collections of Pst isolates it is known that race 1 strains have displaced race 0 strains and are now the most common strains found in the field. Race 0 strains express AvrPto or AvrPtoB and elicit resistance in Pto-expressing tomato lines, whereas race 1 strains lack these effectors and do not elicit resistance. We screened Pst isolates from infected field tomato plants across New York (NY) in 2015 and characterized them for their virulence and for the presence of specific effectors. We found that all isolates encode a functional AvrPto, which can be recognized by Pto. However, this recognition is 'masked' during later stages of infection, allowing development of mild bacterial speck symptoms in Pto-expressing tomatoes when vacuum infiltrated with high bacterial populations and under laboratory conditions. Our study demonstrates that introgression of Pto is still a viable strategy to manage bacterial speck of tomatoes in NY. ...
Author: Jennifer Mae Lorang
Publisher:
ISBN:
Category : Bacterial diseases of plants
Languages : en
Pages : 196
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Author: Doron Teper
Publisher:
ISBN:
Category :
Languages : en
Pages : 53
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Author: K. Rudolph
Publisher: Springer Science & Business Media
ISBN: 9780792346012
Category : Science
Languages : en
Pages : 714
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Book Description
During the last decade, research on Pseudomonas syringae pathovars and related pathogens has progressed rapidly, opening up many new avenues. The application of molecular genetics has provided new insights into determinants of pathogenicity and virulence. Progress has also been made in elucidating the chemical structures and modes of action of phytotoxins from Pseudomonas syringae; by establishing novel strategies for disease control; in biotechnological applications; by studying the resistant reaction of the plant with a combined biochemical and genetic approach; and in the development of new detection and identification methodologies as tools in epidemiological studies. With such rapid advances it becomes more and more difficult to keep abreast of the developments and concepts within disciplines, all involving research on pathovars of P. syringae. In an attempt to provide a balanced overview, recent developments in these rapidly expanding fields have been critically reviewed at the beginning of each chapter by internationally renowned experts. Our comprehensive coverage has been made possible because all the contributors to this volume presented their latest findings at the `5th International Conference on Pseudomonas syringae Pathovars and Related Pathogens' in Berlin, September 3-8, 1995. In this way, it was possible to bring together contributions from a wide range of fields including phytopathology, genetics, bacteriology, plant breeding, plant protection, and taxonomy. This book is not intended simply as a record of the proceedings of the Berlin Conference, but as an extension of recent findings and hypotheses put forward at the meeting. All papers published in this volume have been reviewed by the Editors.
Author: Günther Winkelmann
Publisher: Wiley-VCH
ISBN:
Category : Science
Languages : en
Pages : 568
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Book Description
This first comprehensive treatise on iron transport in bacteria, fungi, plants, and animals summarizes the current state of knowledge on the subject.
Author: Guido Sessa
Publisher: John Wiley & Sons
ISBN: 1118481453
Category : Science
Languages : en
Pages : 312
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Book Description
Molecular Plant Immunity provides an integrated look at both well-established and emerging concepts in plant disease resistance providing the most current information on this important vitally important topic within plant biology. Understanding the molecular basis of the plant immune system has implications on the development of new varieties of sustainable crops, understanding the challenges plant life will face in changing environments, as well as providing a window into immune function that could have translational appeal to human medicine. Molecular Plant Immunity opens with chapters reviewing how the first line of plant immune response is activated followed by chapters looking at the molecular mechanisms that allow fungi, bacteria, and oomycetes to circumvent those defenses. Plant resistance proteins, which provide the second line of plant immune defense, are then covered followed by chapters on the role of hormones in immunity and the mechanisms that modulate specific interaction between plants and viruses. The final chapters look at model plant-pathogen systems to review interaction between plants and fungal, bacterial, and viral pathogens. Written by a leading team of international experts, Molecular Plant Immunity will provide a needed resource to diverse research community investigated plant immunity.
Author: E.W. Nester
Publisher: Springer Science & Business Media
ISBN: 9401706514
Category : Science
Languages : en
Pages : 578
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Book Description
Research on the interaction between plants and microbes continues to attract increasing attention, both within the field as well as in the scientific community at large. Many of the major scientific journals have recently reviewed various aspects of the field. Several papers dealing with plant-microbe interactions have been featured on the covers of scientific publications in the past several months, and the lay press have recently presented feature articles of this field. An additional sign of the interest in this field is that the International Society of Molecular Plant-Microbe Interactions has almost 500 members. This book is a collection of the papers that were given at the Sixth Inlernational Symposium on the Molecular Genetics of Plant-Microbe Interactions which was held in Seattle, Washington in July, 1992. Approximately 650 scientists attended and approximately 50 lectures covering the topics of Agrobacterium-plant interactions, Rhizobium-plant interactions, bacteria-plant interactions, fungal-plant interactions and new aspects of biotechnology were presented. In addition, many sessions were devoted to the plant response to the microbe. Over 400 posters were presented of which the authors of 20 were selected to give an oral presentation. These papers are included in this volume as well. The symposium also included speakers whose research interests are not directly related to plant-microbe interactions but who are at the cutting edge of research areas that impact on the theme of the symposium. These individuals kindly agreed to summarize their talks and their papers are also included.
Author: C.I. Kado
Publisher: Springer Science & Business Media
ISBN: 9401107467
Category : Science
Languages : en
Pages : 676
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Book Description
The growing body of information on bacteria pathogenic for humans, mammals and plants generated within the past ten years has shown the interesting conservation of newly identified genes that playa direct role in the pathogenic mechanism. In addition to these genes, there are also genes that confer host specificities and other traits important in pathogenesis on these pathogens. In this volume, we have organized the subject areas to best fit the concept on the way bacterial pathogens recognize, interact and invade the host, on the regulation of genes involved in virulence, on the genes involved in the elaboration of toxins and other pathogenic components such as iron sequestering proteins, and on the mechanisms of circumventing the host defense systems. These areas are divided into Sections. Section I covers the first step when the pathogen seeks its host, and Sections II through VI cover subsequent steps leading to pathogenesis while avoiding host defenses. We conclude this work with a chapter summarizing information on examples of virulence mechanisms that are highly conserved.
