Bacillus Thuringiensis Toxins
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Bacillus Thuringiensis Toxins Functional Characterization And Mechanism Of Action
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Author : Yolanda Bel
language : en
Publisher:
Release Date : 2021
Bacillus Thuringiensis Toxins Functional Characterization And Mechanism Of Action written by Yolanda Bel and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2021 with categories.
Bacillus thuringiensis (Bt)-based products are the most successful microbial insecticides to date. This entomopathogenic bacterium produces different kinds of proteins whose specific toxicity has been shown against a wide range of insect orders, nematodes, mites, protozoa, and human cancer cells. Some of these proteins are accumulated in parasporal crystals during the sporulation phase (Cry and Cyt proteins), whereas other proteins are secreted in the vegetative phase of growth (Vip and Sip toxins). Currently, insecticidal proteins belonging to different groups (Cry and Vip3 proteins) are widely used to control insect pests and vectors both in formulated sprays and in transgenic crops (the so-called Bt crops). Despite the extensive use of these proteins in insect pest control, especially Cry and Vip3, their mode of action is not completely understood. The aim of this Special Issue was to gather information that could summarize (in the form of review papers) or expand (research papers) the knowledge of the structure and function of Bt proteins, as well as shed light on their mode of action, especially regarding the insect receptors. This subject has generated great interest, and this interest has been materialized into the 18 papers of important scientific value in the field (5 reviews and 13 research papers) that have been compiled in this issue.
Bacillus Thuringiensis For Managing Gypsy Moth
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Author : Richard C. Reardon
language : en
Publisher:
Release Date : 1994
Bacillus Thuringiensis For Managing Gypsy Moth written by Richard C. Reardon and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1994 with Bacillus thuringiensis categories.
Bt Resistance
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Author : Mario Soberon
language : en
Publisher: CABI
Release Date : 2015-04-24
Bt Resistance written by Mario Soberon and has been published by CABI this book supported file pdf, txt, epub, kindle and other format this book has been release on 2015-04-24 with Science categories.
Bacillus thuringiensis (Bt) bacteria use Cry proteins to kill their insect larval hosts. The expression of certain Cry toxins in transgenic crops has been widely used to achieve efficient control of insect pests. This book describes the use of Bt crops and the emerging problem of resistance, recent progress in understanding the mechanism of action of Bt toxins, different resistance mechanisms and strategies to cope with resistance in the field. It describes resistant insects found in the field in different countries, particularly in the developing world, and ways to counter resistance such as gene stalking, refuges, modified toxins and gene discovery of novel toxins with different mode of action.
Entomopathogenic Bacteria From Laboratory To Field Application
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Author : J.F. Charles
language : en
Publisher: Springer Science & Business Media
Release Date : 2013-11-11
Entomopathogenic Bacteria From Laboratory To Field Application written by J.F. Charles 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 2013-11-11 with Science categories.
Entomopathogenic bacteria (Bacillus thuringiensis and B. sphaericus) are increasingly used as biopesticides to control larval insect populations which are either agricultural or forestry pests and to reduce those which as adults are vectors of severe human diseases. This new book, the first since 1993 to address all aspects of entomopathogenic bacteria, provides undergraduate and graduate students as well as research scientists with a complete, modern view of this important group of bacteria. The authors, chosen for their sustained contributions to the field, cover both fundamental and applied research in this area. The main topics include bacterial ecology and taxonomy, toxin diversity, activity and mode of action, regulation and environment of the genes, safety and ecotoxicology, production and field application of the bacteria, and outbreaks of resistant populations. The book concludes with the most recent data obtained on transgenic biotechnology and addresses environmental impact issues.
Bacillus Thuringiensis And Lysinibacillus Sphaericus
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Author : Lidia Mariana Fiuza
language : en
Publisher: Springer
Release Date : 2017-06-10
Bacillus Thuringiensis And Lysinibacillus Sphaericus written by Lidia Mariana Fiuza and has been published by Springer this book supported file pdf, txt, epub, kindle and other format this book has been release on 2017-06-10 with Science categories.
This volume presents a comprehensive perspective of the biopesticides Bacillus thuringiensis and Lysinibacillus sphaericus, from their basic biology to agriculture, forestry and public-health applications. It covers their ecology, virulence factors, and genetic characterization. The topics related to agriculture and forestry include mode of action, receptors of insect pests, and heterologous expression of toxins in insect cells and plants. Public-health researchers will find information on vector control programs with an emphasis on the Neotropical region. The book also discusses new products and the global market.
Bacillus Thuringiensis Biotechnology
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Author : Estibaliz Sansinenea
language : en
Publisher: Springer Science & Business Media
Release Date : 2012-03-02
Bacillus Thuringiensis Biotechnology written by Estibaliz Sansinenea 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 2012-03-02 with Science categories.
Bacillus thuringiensis (Bt) has been used as a biopesticide in agriculture, forestry and mosquito control because of its advantages of specific toxicity against target insects, lack of polluting residues and safety to non-target organisms. The insecticidal properties of this bacterium are due to insecticidal proteins produced during sporulation. Despite these ecological benefits, the use of Bt biopesticides has lagged behind the synthetic chemicals. Genetic improvement of Bt natural strains, in particular Bt recombination, offers a promising means of improving efficacy and cost-effectiveness of Bt-based bioinsecticide products to develop new biotechnological applications. On the other hand, the different Bacillus species have important biotechnological applications; one of them is carried out by producing secondary metabolites, which are the study object of natural product chemistry. The amazing structural variability of these compounds has attracted the curiosity of chemists and the biological activities possessed by natural products have inspired the pharmaceutical industry to search for lead structures in microbial extracts. Screening of microbial extracts reveals the large structural diversity of natural compounds with broad biological activities, such as antimicrobial, antiviral, immunosuppressive, and antitumor activities that enable the bacterium to survive in its natural environment. These findings widen the target range of Bacillus spp., in special B. thuringiensis, besides insecticidal activity and help people to better understand its role in soil ecosystem.
Bacillus Thuringiensis An Environmental Biopesticide
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Author : Philip F. Entwistle
language : en
Publisher:
Release Date : 1993-05-24
Bacillus Thuringiensis An Environmental Biopesticide written by Philip F. Entwistle and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1993-05-24 with Medical categories.
The challenge of bacillus thuringiensis. Historiacal overview: from discovery until 1980s. The 1980s: a decade of change. The future challenge. Diversity of bacillus thuringiensis toxins and genes. Diversity of B. thuringiensis strains and toxins. Localization and molecular organization of the toxin genes. The crystal protein genes and products. Regulation of crystal synthesis. Domain-function studies of bacillus thuringiensis crystal proteins: a genetic approach. Mode of action structural features of crystal proteins. Crystal protein mutants. Crystal protein hybrids. Transgenic bacteria, viruses, algae and other microorganisms as bacillus thuringiensis toxin delivery systems. Conventional B. thuringiensis products: do they nedd to be improved?. The use of transgenic microorganisms to improve insect host range. Improving foliar acticity and delivery. Improving aquatic activity and delivery. Improving soil activity and delivery. Issues in the development of transgenic microorganisms. The engineering of plants to express bacillus thuringiensis -endotoxins. Expression of -endotoxins in dicotyledons. Expression of -endotoxins in monocotyledons. Quantification of -endotoxins expression in planta. Enhancement of -endotoxin expression in planta. Endophyte expression of -endotoxin genes in plants. Control of lepidopteran pests with bacillus thuringiensis. Conventional and genetically engineered b. thuringiensis. Products. Microbial specificity of b. thuringiensis in lepidopteran pests. Entomological aspects of lepidopteran pest control with B. thuringiensis. Integration of B. thuringiensis in lepidopteran pest control strategies. Use of bacillus thuringiensis israelensis against mosquitoes and blackflies. Properties of B. thuringiensis israelensis. Factors influencing the efficacy of B. thuringiensis israelensis treatments. Organization of mosquito control programmes. Successful control programmes using B. thuringiesis israelensis. Future prospects for the use of B. thuringiensis israelensis. Control of coleopteran pests by bacillus thuringiensis. B. thuringiensis tenebrionis products and their registration. Characterization of B. thuringiensis tenebrionis and other coleopteran-active subspecies. Host range of B. thuringiensis tenebrionis and susceptibility levels of some pest species. The impact of B. thuringiensis tenebrionis on nor-target animals. Control of coleoptera by -exotoxin. Field trials with B. thuringiensis tenebrionis. Future prospects. Bacillus thuringiensis in the environment: ecology and risk assessment. Role in the environment. Risk assessment. Resistance to bacillus thuringiensis and resistance management. Field resistance development to B. thuringiensis. Laboratory selection for resistance. Cross resistance of B. thuringiensis to chemicals and other B. thuringiensis strains. Genetics of resistance. Mechanisms of resistance. Strategies for delaying resistance development. The use of bacillus thuringiensis in developing countries. History and usage of B. thuringiensis in developing nations. Strain survey and selection. Production levels and costs. Inexpensive and local fermentation media. Low technology fermentation procedures. Stability and formulation. Field application. Further development of B. thuringiensis. Future role for B. thuringiensis in developing countries. Production of bacillus thuringiensis insecticides for experimental and commercial uses. Optimization of production methods. Production methods for B. thuringiensis. Quality control.
Toxin Binding Proteins And The Mode Of Action Of Bacillus Thuringiensis Cry Toxins
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Author : Meibao Zhuang
language : en
Publisher:
Release Date : 2002
Toxin Binding Proteins And The Mode Of Action Of Bacillus Thuringiensis Cry Toxins written by Meibao Zhuang and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2002 with Bacillus thuringiensis categories.
Cloning And Characterization Of Mosquitocidal Genes Form Bacillus Thuringiensis Subsp Jegathesan
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Author : Michael David Kawalek
language : en
Publisher:
Release Date : 1998
Cloning And Characterization Of Mosquitocidal Genes Form Bacillus Thuringiensis Subsp Jegathesan written by Michael David Kawalek and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1998 with Bacillus thuringiensis categories.
Structure Function Analyses Of The Bacillus Thuringiensis Cryivd Mosquitocidal Toxin
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Author : Cheng Chang
language : en
Publisher:
Release Date : 1992
Structure Function Analyses Of The Bacillus Thuringiensis Cryivd Mosquitocidal Toxin written by Cheng Chang and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1992 with Amino acids categories.