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Related Concept Videos

Methods for Controlling Microbial Growth01:29

Methods for Controlling Microbial Growth

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...
Biological Methods for Microbial Control01:28

Biological Methods for Microbial Control

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...
Soil Microbial Ecology01:29

Soil Microbial Ecology

Soil microbial ecology is defined by highly diverse, spatially structured communities that drive nutrient cycling, organic matter turnover, and overall ecosystem stability. Although a gram of soil can contain thousands of bacterial and archaeal taxa, the ecological processes they mediate are even more crucial for sustaining terrestrial life.Microhabitats and NichesSoil is a heterogeneous mixture of minerals, organic matter, water, and air. Microbes inhabit distinct microhabitats formed by...
Physical Methods for Controlling Microbial Growth: Radiation and Filtration01:26

Physical Methods for Controlling Microbial Growth: Radiation and Filtration

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.
Bioreactor Controls-I01:28

Bioreactor Controls-I

Maintaining optimal conditions within fermenters is essential for maximizing microbial productivity and ensuring process efficiency. This lesson focuses on key parameters—temperature, foam, pH, carbon dioxide, oxygen, and pressure—and their precise measurement and control strategies in fermentation systems.Temperature ControlTemperature regulation is critical due to the exothermic nature of many fermentation processes. In small laboratory fermenters, temperature is commonly monitored using...
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Microbe-Plant Interactions

Microbe-plant interactions represent a dynamic spectrum of associations shaped by intricate chemical signaling. These interactions can be neutral, beneficial, or detrimental, and profoundly influence plant physiology, growth, and ecosystem function. The plant microbiome, comprising bacteria, fungi, archaea, protists, and viruses, plays a pivotal role in mediating these effects through surface colonization, internal colonization, or systemic symbiosis.Mutualistic associations, particularly with...

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Updated: May 20, 2026

Monitoring Bacterial Colonization and Maintenance on Arabidopsis thaliana Roots in a Floating Hydroponic System
09:04

Monitoring Bacterial Colonization and Maintenance on Arabidopsis thaliana Roots in a Floating Hydroponic System

Published on: May 28, 2019

Microbial colonization and controls in dryland systems.

Stephen B Pointing1, Jayne Belnap

  • 1School of Biological Sciences, The University of Hong Kong, Pokfulam Road, Hong Kong SAR, China. steve.pointing@aut.ac.nz

Nature Reviews. Microbiology
|July 10, 2012
PubMed
Summary
This summary is machine-generated.

Life forms in drylands, such as microbial communities, are crucial for ecosystem processes. These organisms survive harsh conditions, mediating nutrient and water cycles in deserts.

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Published on: March 1, 2022

Area of Science:

  • Ecology
  • Environmental Science
  • Microbiology

Background:

  • Drylands cover over a third of Earth's land, characterized by extreme stress limiting life.
  • Organisms in drylands must tolerate desiccation and rehydrate to resume growth, playing key roles in ecosystem functions.

Purpose of the Study:

  • To review the assembly and function of soil- and rock-surface microbial communities in deserts.
  • To highlight the role of these communities in mediating biogeochemical cycles and regulating desert environments.
  • To discuss challenges in managing dryland resources considering these unique biological communities.

Main Methods:

  • This is a review article, synthesizing existing research on desert microbial communities.
  • The review examines the ecological roles and functions of these communities in various desert types (hot and cold).
  • It analyzes the impact of these communities on ecosystem processes like nutrient cycling and water regulation.

Main Results:

  • Microbial communities form a thin layer on desert soil and rock surfaces, primarily composed of biomass.
  • These communities are central to regulating gas, nutrient, and water exchange at desert surfaces.
  • They significantly influence weathering, soil stability, and hydrological and nutrient cycles within dryland ecosystems.

Conclusions:

  • Desert surface microbial communities are vital for ecosystem processes and environmental regulation.
  • Their influence extends to regional and global environmental impacts.
  • Integrating the understanding of these communities into dryland resource management is essential but challenging.