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Biological Methods for Microbial Control01:28

Biological Methods for Microbial Control

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Biological agents offer an effective means of controlling microbial growth by leveraging natural processes like predation, competition, and the secretion of antimicrobial substances.Predatory bacteria such as Bdellovibrio species target and kill pathogens like Salmonella and E. coli. They are widely used in poultry farms to control infections. Myxococcus species help combat plant-pathogenic fungi. These naturally occurring predators serve as eco-friendly alternatives to chemical pesticides and...
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Microorganisms play a crucial role in agriculture and the food industry, contributing to soil fertility, crop protection, and food production. Their functions range from nitrogen fixation and biopesticide production to fermentation and food preservation, making them indispensable to sustainable farming and food safety.Role in AgricultureNitrogen-fixing bacteria, such as Rhizobium (symbiotic) and Azotobacter (free-living), convert atmospheric nitrogen into ammonia through biological nitrogen...
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Microbial growth control refers to various methods employed to inhibit, reduce, or eliminate microorganisms to ensure safety and hygiene across different settings. These methods are categorized based on the target environment and the level of microbial control required.Biocides are versatile agents designed to control microorganisms by either inhibiting their growth or outright killing them. These agents work through various physical, chemical, mechanical, or biological mechanisms. The...
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Radiation and filtration are essential tools for microbial control, targeting microorganisms through distinct mechanisms. Radiation eliminates microbes by damaging their DNA, either killing them or inhibiting their growth. Based on wavelength, radiation is classified into two types: nonionizing and ionizing radiation.Non-ionizing radiation, such as UV radiation (200–400 nm), is absorbed by DNA, causing defects that effectively disinfect surfaces, air, and water, including safety cabinets.
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Quorum sensing is a mechanism of bacterial communication that enables coordinated gene expression in response to changes in population density. This facilitates collective behaviors that enhance survival, resource acquisition, and ecological adaptation. This process relies on small signaling molecules called autoinducers that accumulate as bacterial populations grow. When a critical threshold concentration of autoinducers is reached, bacterial cells collectively modify gene expression,...
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Combating Fusarium Infection Using Bacillus-Based Antimicrobials.

Noor Khan1, Maskit Maymon2, Ann M Hirsch3,4

  • 1Department of Molecular, Cell and Developmental Biology, University of California, Los Angeles, CA 90095, USA. noor.612@gmail.com.

Microorganisms
|November 23, 2017
PubMed
Summary
This summary is machine-generated.

Biological control agents, specifically Bacillus species, offer a sustainable method to combat destructive Fusarium plant diseases. These beneficial bacteria effectively limit pathogen spread and protect crops through various mechanisms.

Keywords:
Bacillus sp.Fusarium sp.antagonismantimicrobial peptidebiocontrolplant protection

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Area of Science:

  • Plant Pathology
  • Microbiology
  • Agricultural Science

Background:

  • Toxigenic *Fusarium* species cause destructive and economically damaging wilt and head-blight diseases globally.
  • Biological control agents (BCAs) provide an effective, safe, and sustainable approach to manage *Fusarium*-induced plant diseases.
  • Members of the genus *Bacillus* are widely used as BCAs due to their multifaceted interactions with plants and pathogens.

Purpose of the Study:

  • To survey advances in research on the *Bacillus-Fusarium* interaction.
  • To focus on the principles and mechanisms of action of plant-growth promoting *Bacillus* species.
  • To highlight the use of *Bacillus* in controlling *Fusarium* spread and infestations in economically important crops.

Main Methods:

  • Review of existing scientific literature on *Bacillus* and *Fusarium* interactions.
  • Analysis of mechanisms employed by *Bacillus* species, including nutrient competition, fungitoxic metabolite production, and induction of systemic resistance.
  • Survey of studies demonstrating the efficacy of *Bacillus* in controlling *Fusarium* in agricultural settings.

Main Results:

  • *Bacillus* species exhibit diverse mechanisms to antagonize *Fusarium* pathogens.
  • *Bacillus* promotes plant growth and enhances plant defense systems.
  • These bacteria effectively reduce *Fusarium* disease severity and crop losses.

Conclusions:

  • Understanding the plant-biocontrol agent-pathogen interactions is crucial for effective disease management.
  • *Bacillus* species represent a valuable tool for sustainable crop protection against *Fusarium* diseases.
  • Exploiting these beneficial bacteria as inoculants, alone or in combination, can enhance crop resilience and yield.