Biological Control of Cucumber Black Root Rot by Gliocladium Roseum PDF Download
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Author: Arnold R. Moody
Publisher:
ISBN:
Category :
Languages : en
Pages : 4
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Author: Arnold R. Moody
Publisher:
ISBN:
Category :
Languages : en
Pages : 4
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Author: Syama Gauri Dasi Chatterton
Publisher:
ISBN:
Category : Cucumbers
Languages : en
Pages : 0
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Book Description
Gliocladium catenulatum strain J1446 (formulated as Prestop WP, Verdera Oy) is a biological control agent of Fusarium root and stem rot caused by Fusarium oxysporum f. sp. Radicis-cucumerinum on greenhouse cucumber plants. The mechanisms involved in biocontrol efficacy are currently unknown. Following transformation of G. Catenulatum with the ß-glucuronidase (uidA) gene, blue-stained mycelia could be seen growing on the surface and within epidermal and cortical cells of roots, stems and shoots 3 weeks after treatment. Application of G. catenulatum preceding inoculation with Fusarium significantly reduced pathogen populations on roots compared to plants inoculated with Fusarium alone, while densities of the biocontrol agent increased in the presence of the pathogen. Factors influencing root population levels included nutrient solution pH, temperature and growing media type, while cucumber cultivar, root wounding and addition of nutrients did not appear to significantly affect colonization. In culture, G. catenulatum produced chitinase and ß-1,3-glucanase enzymes on chitin or laminarin as a sole carbon source, respectively, and caused localized degradation of Fusarium hyphae. Cucumber root extracts from G. catenulatum-colonized plants had significantly higher levels of glucanase at 7 days post-application compared to untreated controls. Reverse-transcription polymerase chain reaction using primers designed to amplify a ß-1,3-glucanase gene confirmed G. catenulatum glucanase expression on roots. In a split-root system, G. catenulatum applied to one-half of the roots prior to inoculation with Fusarium on the other half did not significantly reduce disease compared to plants treated with Fusarium only. There was no detectable increase in chitinase, peroxidase or polyphenol oxidase enzyme activity in roots and leaves following treatment with G. catenulatum. Competitive colonization of the rhizosphere by G. catenulatum, which is facilitated by its mycoparasitic ability, are the primary mechanisms by which pathogen development and disease incidence is reduced.
Author: R. Cavalloro
Publisher: CRC Press
ISBN: 9789061917908
Category : Technology & Engineering
Languages : en
Pages : 276
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Author: K. G. Mukerji
Publisher: CRC Press
ISBN: 1000888045
Category : Science
Languages : en
Pages : 328
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First Published in 1988, this set offers a comprehensive insight into controlling diseases in plants. Carefully compiled and filled with a vast repertoire of notes, diagrams, and references this book serves as a useful reference for biologists, horticulturalists, other practitioners in their respective fields.
Author: Makoto Shoda
Publisher: CRC Press
ISBN: 0429643101
Category : Medical
Languages : en
Pages : 326
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Book Description
Plant diseases are a serious threat to food production. This unique volume provides the fundamental knowledge and practical use of B.subtilis as a promising biocontrol agent. In order to replace chemical pesticides, one possibility is microbial pesticides using safe microbes. Bacillus subtilis is one of several candidates. Screening of the bacterium, the application of plant tests, clarification of its suppressive mechanism to plant pathogens and engineering aspects of suppressive peptides production are presented here. The author illustrates how B. subtilis is far more advantageous than, for example, Pseudomonas in biocontrol and can be considered as an useful candidate. Features: Bacterium B. subtilis suppresses many plant pathogens and is a biocontrol agent to replace chemical pesticides The book presents the bacterium's suppressive mechanism to plant pathogens, and engineering aspects of suppressive peptides production Biological control of plant disease plays an important role in sustainable agricultural production practices and is expected to replace agricultural chemicals
Author: S.V. Krupa
Publisher: Elsevier
ISBN: 0444601678
Category : Technology & Engineering
Languages : en
Pages : 292
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Book Description
Ecology of Root Pathogens discusses the significance of fungi infecting the roots, and emphasizes the significant diseases of roots and their symptoms. This book also names the genera and species of fungi that cause diseases of roots, and classifies and characterizes the root and pathogen interaction in soil. The book describes the behavior of plant pathogenic bacteria, such as Agrobacterium, Corynebacterium, Xanthomonas, Pseudomonas, Erwinia, and Streptomyces. It also explores how plants and plant-produced stimuli affect the associated population of plant parasitic nematodes and how these plant parasitic nematodes affect higher plants in certain ways. In addition, this book discusses the morphology, classification, nomenclature, multiplication and translocation of viruses infecting the plants. It also describes the symptoms of the virus infection in roots. The book includes a discussion on the fundamentals of biological control, which include the pathosystem concept, the behavior of the soil microflora in the soil, the reservoirs for infection, the processes of pathogen decline, and the integrated effects on the decline of the pathogen. This discussion on biological control also presents the natural and artificially induced biological control. This book will be of great value to soil microbiologists and plant pathologists.
Author: D.G. Jones
Publisher: Springer Science & Business Media
ISBN: 940111532X
Category : Science
Languages : en
Pages : 494
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Book Description
Microbiology may be described as one of the younger sciences with its history, as a precise subject, only dating as far back as Pasteur in the mid 1800s and his revelation both of the role of microorganisms in nature and their importance to human welfare. Medical scientists rapidly took up the challenge, with their area of microbiology flourishing and expanding almost in complete isolation from the rest of biology. We now know, of course, that microorganisms have always played an important, if not essential role, in the biosphere with fermented foods and beverages, plant and animal diseases and nutrient cycling foremost in their sphere of activities. Within the last twenty years, microbiology has received two enormous boosts with the developments in microbial genetics and genetic engineering probably being the most influential, and the greater awareness of pollution and environmental sustainability following a close second. In 1990, your editor had the privilege and pleasure of being elected as President of The Association of Applied Biologists in the United King dom and, as the topic for his three-day Presidential Conference, chose 'The exploitation of microorganisms in applied biology'. This meeting stimu lated great interest in a wide range of subject areas, from weed control to nematology, from plant breeding to plant pathology, from mushrooms to mycorrhiza. The proceedings of this meeting were published in Aspects of Applied Biology, No. 24, 1990.
Author: Jack E. Rechcigl
Publisher: CRC Press
ISBN: 135108027X
Category : Science
Languages : en
Pages : 399
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Book Description
The use of chemicals in agriculture and home gardens has become an area of concern due to improper use and negative environmental effects. Environmentally Safe Approaches to Crop Disease Control addresses alternative approaches for managing crop diseases. It gives a balanced overview of state-of-the-art environmentally safe approaches to crop disease control and discusses the latest trends.
Author: Christopher John Roberts
Publisher:
ISBN:
Category :
Languages : en
Pages :
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Author: Dilip K. Arora
Publisher: CRC Press
ISBN: 9780824783808
Category : Science
Languages : en
Pages : 740
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Book Description
This first volume in a new series emphasizes the role of fungi in the fertility of soil and plant yield, covering such topics as biodegradation of plant litter and pesticides, microbial interactions, mycorrhizal symbionts, and mathematical modeling of diseases. Major sections treat mycorrhizae and e
