Microbial interactions and biocontrol in the rhizosphere
TLDR
Multiple microbial interactions involving bacteria and fungi in the rhizosphere are shown to provide enhanced biocontrol in many cases in comparison with biocOntrol agents used singly.Abstract:
The loss of organic material from the roots provides the energy for the development of active microbial populations in the rhizosphere around the root. Generally, saproptrophs or biotrophs such as mycorrhizal fungi grow in the rhizosphere in response to this carbon loss, but plant pathogens may also develop and infect a susceptible host, resulting in disease. This review examines the microbial interactions that can take place in the rhizosphere and that are involved in biological disease control. The interactions of bacteria used as biocontrol agents of bacterial and fungal plant pathogens, and fungi used as biocontrol agents of protozoan, bacterial and fungal plant pathogens are considered. Whenever possible, modes of action involved in each type of interaction are assessed with particular emphasis on antibiosis, competition, parasitism, and induced resistance. The significance of plant growth promotion and rhizosphere competence in biocontrol is also considered. Multiple microbial interactions involving bacteria and fungi in the rhizosphere are shown to provide enhanced biocontrol in many cases in comparison with biocontrol agents used singly. The extreme complexity of interactions that can occur in the rhizosphere is highlighted and some potential areas for future research in this area are discussed briefly.read more
Citations
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Trichoderma species--opportunistic, avirulent plant symbionts.
TL;DR: Root colonization by Trichoderma spp.
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Plant growth promoting rhizobacteria as biofertilizers
TL;DR: This review focuses on the known, the putative, and the speculative modes-of-action of PGPR, which include fixing N2, increasing the availability of nutrients in the rhizosphere, positively influencing root growth and morphology, and promoting other beneficial plant–microbe symbioses.
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.
Journal ArticleDOI
Plant Growth-Promoting Bacteria: Mechanisms and Applications
TL;DR: It is envisioned that in the not too distant future, plant growth-promoting bacteria (PGPB) will begin to replace the use of chemicals in agriculture, horticulture, silviculture, and environmental cleanup strategies.
Journal ArticleDOI
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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Journal ArticleDOI
The enhancement of plant growth by free-living bacteria
TL;DR: The ways in which plant growth promoting rhizobacteria facilitate the growth of plants are considered and discussed and the possibility of improving plant growth promotion by specific genetic manipulation is critically examined.
Journal ArticleDOI
Systemic acquired resistance
TL;DR: The molecular events underlying SAR are discussed: the mechanisms involved in SAR, including lignification and other structural barriers, pathogenesis-related proteins and their expression, and the signals for SAR including salicylic acid.
Journal ArticleDOI
Increase in Salicylic Acid at the Onset of Systemic Acquired Resistance in Cucumber
Jean-Pierre Métraux,H. Signer,John Ryals,Eric R. Ward,M. Wyss-Benz,J. Gaudin,K. Raschdorf,E. Schmid,W. Blum,B. Inverardi +9 more
TL;DR: Monitoring of cucumber plants inoculated with either tobacco necrosis virus or the fungal pathogen Colletotrichum lagenarium suggested that salicylic acid could function as the endogenous signal in the transmission of SAR in cucumber.
Journal ArticleDOI
BIOCONTROL WITHIN THE CONTEXT OF SOIL MICROBIAL COMMUNITIES: A Substrate-Dependent Phenomenon.
TL;DR: Broad spectrum biological control of diseases caused by soilborne plant pathogens such as Pythium, Phytophthora, and Rhizoctonia solani requires the introduction into or presence of edaphic sources of organic nutrients in soil for sustenance of biocontrol agents.
BookDOI
Modern soil microbiology
TL;DR: Soil Environment, D.D. Standing and K. Killham Microbial Phylogeny and Diversity in Soil, V.T. Torsvik and L. Ovreas Horizontal Gene Transfer and Microevolution in So soil, K.K. Finlay and M.I. Prosser Soil Microbial Communities and Global Climate Change-Methanotrophic and Methanogenic Communities as Paradigms.
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