The Etiology, Virulence, and Phylogenetics of the Celery Anthracnose Pathogen, Colletotrichum Fioriniae ( PDF Download
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Author: Jason A. Pavel
Publisher:
ISBN:
Category : Celery
Languages : en
Pages : 188
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Book Description
An anthracnose disease of celery, caused by Colletotrichum acutatum sensu lato, has been reported in the U.S. A phylogenetic analysis was conducted on a collection of isolates from celery and non-celery hosts to evaluate their taxonomic position within Colletotrichum acutatum sensu lato. Both celery and non-celery isolates were evaluated for pathogenicity on celery and for vegetative compatibility. Culture filtrates from celery and non-celery isolates were evaluated for their ability to reproduce the unusual leaf curl type symptoms. A total of 18 celery isolates were evaluated for their taxonomic placement based on analysis of the glutamine synthetase intron sequence. All isolates were closely related and belonged to the newly described species Colletotrichum fioriniae. A total of 57 isolates of Colletotrichum acutatum sensu lato and C. fioriniae, representing four previously defined genetic clades, were found to have a wide virulence spectrum on celery. All isolates originating from celery caused disease on celery whereas a wide range in virulence on celery was observed among the non-celery isolates. The 18 celery isolates grouped into six vegetative compatibility groups indicating the population was not clonal. Elevated temperatures greatly increased leaf curl symptoms in greenhouse tests. The degree of crown rot severity and the number of petiole lesions per plant were correlated with the percent of leaf curl symptoms. Although there were inconsistencies in the experiments to determine if culture filtrates can cause leave curl symptoms, some evidence indicates that certain isolates produce a metabolite that mimics the leaf curl symptoms of the disease. The filtrate may contain indole acetic acid (IAA), and purified IAA can also cause leaf curl symptoms on celery.
Author: Jason A. Pavel
Publisher:
ISBN:
Category : Celery
Languages : en
Pages : 188
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Book Description
An anthracnose disease of celery, caused by Colletotrichum acutatum sensu lato, has been reported in the U.S. A phylogenetic analysis was conducted on a collection of isolates from celery and non-celery hosts to evaluate their taxonomic position within Colletotrichum acutatum sensu lato. Both celery and non-celery isolates were evaluated for pathogenicity on celery and for vegetative compatibility. Culture filtrates from celery and non-celery isolates were evaluated for their ability to reproduce the unusual leaf curl type symptoms. A total of 18 celery isolates were evaluated for their taxonomic placement based on analysis of the glutamine synthetase intron sequence. All isolates were closely related and belonged to the newly described species Colletotrichum fioriniae. A total of 57 isolates of Colletotrichum acutatum sensu lato and C. fioriniae, representing four previously defined genetic clades, were found to have a wide virulence spectrum on celery. All isolates originating from celery caused disease on celery whereas a wide range in virulence on celery was observed among the non-celery isolates. The 18 celery isolates grouped into six vegetative compatibility groups indicating the population was not clonal. Elevated temperatures greatly increased leaf curl symptoms in greenhouse tests. The degree of crown rot severity and the number of petiole lesions per plant were correlated with the percent of leaf curl symptoms. Although there were inconsistencies in the experiments to determine if culture filtrates can cause leave curl symptoms, some evidence indicates that certain isolates produce a metabolite that mimics the leaf curl symptoms of the disease. The filtrate may contain indole acetic acid (IAA), and purified IAA can also cause leaf curl symptoms on celery.
Author: Suresh Kumar Dubey
Publisher: Springer Nature
ISBN: 9811633649
Category : Science
Languages : en
Pages : 397
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Book Description
This book describes the multitude of interactions between plant, soil, and micro-organisms. It emphasizes on how growth and development in plants, starting from seed germination, is heavily influenced by the soil type. It describes the interactions established by plants with soil and inhabitant microbial community. The chapters describe how plants selectively promote certain microorganisms in the rhizospheric ecozone to derive multifarious benefits such as nutrient acquisition and protection from diseases. The diversity of these rhizospheric microbes and their interactions with plants largely depend on plant genotype, soils attributes, and several abiotic and biotic factors. Most of the studies concerned with plant–microbe interaction are focused on temperate regions, even though the tropical ecosystems are more diverse and need more attention. Therefore, it is crucial to understand how soil type and climatic conditions influence the plant–soil–microbes interaction in the tropics. Considering the significance of the subject, the present volume is designed to cover the most relevant aspects of rhizospheric microbial interactions in tropical ecosystems. Chapters include aspects related to the diversity of rhizospheric microbes, as well as modern tools and techniques to assess the rhizospheric microbiomes and their functional roles. The book also covers applications of rhizospheric microbes and evaluation of prospects improving agricultural practice and productivity through the use of microbiome technologies. This book will be extremely interesting to microbiologists, plant biologists, and ecologists.
Author: John William Roberts
Publisher:
ISBN:
Category : Agriculture
Languages : en
Pages : 38
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Book Description
Author: Michael J. Jeger
Publisher: Cabi
ISBN:
Category : Science
Languages : en
Pages : 410
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Book Description
"Colletotrichum" is a genus of plant pathogenic fungi of great economic importance, particularly in the tropics. This volume on the group covers topics such as taxonomy, cellular and molecular biology, epidemiology, field pathology and host resistance.
Author: Dov Prusky
Publisher:
ISBN:
Category : Science
Languages : en
Pages : 412
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Book Description
Linking the past, present and future of Colletotrichum systematics; The importance of phylogeny in understanding host relationships within Colletotrichum; Genetic regulation of sexual compatibility in Glomerella graminicola; Vegetative compatibility in Colletotrichum; Dissecting the cell biology of Colletotrichum infection processes; Early molecular communication between Colletotrichum gloeosporioides and its host; Regulation of melanin biosynthesis genes during appressorium formation by Colletotrichum lagenarium; Colletotrichum as a model system for defining the genetic basis of fungal symbiotic life styles; Genetic diversity and host specificity of Colletotrichum species on various fruits; Inter- and intra-species variation in Colletotrichum and mechanism which affect population structure; Gene transfer and expression in Colletotrichum gloeosporioides causing anthracnose on Stylosanthes;The endopolygalacturonases of Colletotrichum lindemuthianum: Molecular characterization, gene expression, and elicitor activity; Signal exchange during Colletotrichum trifolii-alfalfa interactions; Resistance mechanisms of subtropical fruits to Colletotrichum gloeosporioides; Colletotrochum strains for weed control; Potential for biological controI of diseases caused by Colletotrichum; Colletotrichum diseases of strawberries in Florida; Biology and controI of anthracnose diseases of citrus; Occurrence and management of anthracnose epidemics cause Colletotrichum species on tree fruit crops in California; Recent advances in understanding Colletotrichum diseases of some tropical perennial crops; Host-pathogen interaction and viability of Colletotrichum lindemuthianum; Colletotrichum coccodes on potato; The biology of Colletotrichum graminicola and maize anthracnose.;
Author: Josef Adolf Arx
Publisher:
ISBN:
Category : Science
Languages : en
Pages : 304
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Book Description
Author: Barbara H. Iglewski
Publisher: Elsevier
ISBN: 0323148670
Category : Science
Languages : en
Pages : 486
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Book Description
Molecular Basis of Bacterial Pathogenesis focuses on the molecular mechanism of disease associated with bacterial pathogens. Topics covered include the population genetics of bacterial pathogenesis; environmental modulation of gene expression in gram-negative pathogens; and bacterial invasion and intracellular growth. Bacterial toxins are also discussed. This volume is comprised of 20 chapters and begins with an overview of pathogenesis, paying particular attention to common elements and genetic mechanisms of regulation. The discovery that many bacterial pathogens are clonal, with individual clones often having a greater virulence than others, is then considered. The next section deals with the regulation of synthesis of surface components and their role in colonization of the host and/or evasion of the host immune defense systems; antigenic variation and its role in evasion of the host immune response; and the role of iron acquisition systems in the colonization of the host. Subsequent chapters explore the invasion and intracellular growth of facultative and obligate intracellular parasites. The last section is devoted to studies on the role of bacterial toxic products in pathogenesis. Bacterial lipopolysaccharides (endotoxins) and exotoxins are described. This book should be of interest to molecular biologists, physiologists, clinical specialists, pathologists, and geneticists.
Author: Dov Prusky
Publisher: Springer Science & Business Media
ISBN: 1402089309
Category : Science
Languages : en
Pages : 212
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Book Description
As a collection of papers that includes material presented at the 2008 International Congress for Plant Pathology, this text features research right at the leading edge of the field. The latest findings are particularly crucial in their implications for fruit production; an important market sector where in some areas up to 50 per cent of the crop can be lost after harvest. While post-harvest fruit treatments with fungicides are the most effective means to reduce decay, rising concerns about toxicity have led to the development of alternative approaches to disease control, including biological methods, the subject of three chapters of this book. With several new techniques requiring modification of current post-harvest practices, it is more important than ever to stay abreast of the latest information. Other chapters deal with the mechanisms of host fruit and vegetable resistance, fungal pathogenicity factors and their relationship with the host response, and a number of subjects related to disease assessments before harvest as well as their relationship to the postharvest treatment of fruits and vegetables. The book also includes several useful case studies of crops such as kiwifruit and peaches, where different approaches at the pre- and post-harvest levels are combined to good effect. With food production issues gaining an ever higher profile internationally, this text makes an important contribution to the debate.
Author: Djafar Ershad
Publisher:
ISBN:
Category : Fungi
Languages : en
Pages : 298
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Book Description
Author:
Publisher:
ISBN:
Category : Ascomycetes
Languages : en
Pages : 96
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Book Description
