Biological control of soilborne plant pathogens in the rhizosphere with bacteria
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TLDR
In some soils described as microbiologi cally suppressive to pathogens, microbial antagonism of the pathogen is especially great, leading to substantial disease control, and those identified are excellent examples of the full potential of biological control of soilborne pathogens.Abstract:
Biological control of soilborne pathogens by introduced microorganisms has been studied for over 65 years (9, 49), but during most of that time it has not been considered commercially feasible. Since about 1 965, however, interest and research in this area have increased steadily (9), as reflected by the number of books (10, 47,49, 152) and reviews about it (11,26,30, 106, 143, 153, 173, 174, 183) that have appeared . Concurrently, there has been a shift to the opinion that biological control can have an important role in agriculture in the future, and it is encouraging that several companies now have programs to develop biocontrol agents as commercial products. This renewed interest in biocontrol is in part a response to public concern about hazards associated with chemical pesticides. Microorganisms that can grow in the rhizosphere are ideal for use as biocontrol agents, since the rhizosphere provides the front-line defense for roots against attack by pathogens. Pathogens encounter antagonism from rhizosphere microorganisms before and during primary infection and also during secondary spread on the root. In some soils described as microbiologi cally suppressive to pathogens (172), microbial antagonism of the pathogen is especially great, leading to substantial disease control. Although pathogen suppressive soils are rare, those identified are excellent examples of the full potential of biological control of soilborne pathogens.read more
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Plant-growth-promoting rhizobacteria.
TL;DR: This review restricts itself to bacteria that are derived from and exert this effect on the root and generally designated as PGPR (plant-growth-promoting rhizobacteria), which can be direct or indirect in their effects on plant growth.
Journal ArticleDOI
Biological control of soil-borne pathogens by fluorescent pseudomonads
Dieter Haas,Geneviève Défago +1 more
TL;DR: Biocontrol strains of fluorescent pseudomonads produce antifungal antibiotics, elicit induced systemic resistance in the host plant or interfere specifically with fungal pathogenicity factors during root colonization.
Journal ArticleDOI
Use of Plant Growth-Promoting Bacteria for Biocontrol of Plant Diseases: Principles, Mechanisms of Action, and Future Prospects
TL;DR: As agricultural production intensified over the past few decades, producers became more and more dependent on agrochemicals as a relatively reliable method of crop production.
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Systemic resistance induced by rhizosphere bacteria
TL;DR: Rhizobacteria-mediated induced systemic resistance (ISR) is effective under field conditions and offers a natural mechanism for biological control of plant disease.
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Plant growth-promoting rhizobacteria (PGPR): emergence in agriculture
TL;DR: The progress to date in using the rhizosphere bacteria in a variety of applications related to agricultural improvement along with their mechanism of action with special reference to plant growth-promoting traits are summarized and discussed in this review.
References
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Enhanced plant growth by siderophores produced by plant growth-promoting rhizobacteria
TL;DR: Evidence is presented that PGPR exert their plant growth-promoting activity by depriving native microflora of iron by producing extracellular siderophores (microbial iron transport agents) which efficiently complex environmental iron, making it less available to certain nativemicroflora.
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Microbial Iron Compounds
TL;DR: Are there Siderophores in Plants and Animals?
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Interactions of Deleterious and Beneficial Rhizosphere Microorganisms and the Effect of Cropping Practices
TL;DR: Recent knowledge on deleterious and beneficial rhizosphere bacteria, their interactions, and their effect on yield as related to cropping practices are reviewed.
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Control of rhizoctonia solani on cotton seedlings with Pseudomonas fluorescens and with an antibiotic produced by the bacterium.
TL;DR: The isolation and identification of a fluorescent diameter wells cut in PDA plates inoculated simultaneously on the pseudomonad antagonistic to R. solani and the identification of an antagonistic bacterium from antibiotic was crystallized from it after cooling.