Jove
Visualize
Contact Us
JoVE
x logofacebook logolinkedin logoyoutube logo
ABOUT JoVE
OverviewLeadershipBlogJoVE Help Center
AUTHORS
Publishing ProcessEditorial BoardScope & PoliciesPeer ReviewFAQSubmit
LIBRARIANS
TestimonialsSubscriptionsAccessResourcesLibrary Advisory BoardFAQ
RESEARCH
JoVE JournalMethods CollectionsJoVE Encyclopedia of ExperimentsArchive
EDUCATION
JoVE CoreJoVE BusinessJoVE Science EducationJoVE Lab ManualFaculty Resource CenterFaculty Site
Terms & Conditions of Use
Privacy Policy
Policies

Related Concept Videos

Responses to Salt Stress02:02

Responses to Salt Stress

13.4K
Salt stress—which can be triggered by high salt concentrations in a plant’s environment—can significantly affect plant growth and crop production by influencing photosynthesis and the absorption of water and nutrients.
13.4K
Factors Influencing Microbial Growth: Osmolarity01:28

Factors Influencing Microbial Growth: Osmolarity

209
Osmolarity is the measure of solute concentration in a solution. It plays a critical role in determining water availability for organisms. Water moves across semipermeable membranes through osmosis, flowing from regions of lower solute concentration (more dilute) to regions of higher solute concentration (more concentrated).In high-solute environments, microbial cells lose water, leading to dehydration and inhibited growth. The extent to which water is available to microbes in such environments...
209
Stringent Response in E. coli01:23

Stringent Response in E. coli

68
Bacterial growth is closely tied to nutrient availability, with cells proliferating exponentially under favorable conditions and entering a stationary phase when resources become scarce. This transition is mediated by a regulatory mechanism known as the stringent response, which allows bacteria to adapt to nutrient deprivation by modulating gene expression and metabolic activity.During nutrient scarcity, intracellular amino acid levels decline. It results in the accumulation of uncharged tRNAs...
68
Global Regulatory Systems01:28

Global Regulatory Systems

99
Global regulatory systems in bacteria enable rapid and coordinated responses to environmental changes by integrating sensory inputs with gene expression, ensuring efficient adaptation to fluctuating conditions. Key global regulatory mechanisms include regulons, two-component systems, sigma factors, and secondary messengers.Regulons and Global RegulatorsA regulon is a collection of genes and operons controlled by a common global regulator. These regulators enable bacteria to prioritize resource...
99
Microbial Growth Measurement: Indirect Methods01:27

Microbial Growth Measurement: Indirect Methods

294
Estimating microbial growth is essential for understanding population dynamics and environmental adaptations. Indirect methods provide valuable insights by measuring parameters such as turbidity, metabolic activity, and biomass, enabling efficient and reproducible assessments.During exponential growth, microbial cells scatter light proportionally to their biomass, a principle used in turbidity measurements. About one million cells per milliliter produce detectable scattering, which a...
294
Other Stress Responses in Bacteria01:30

Other Stress Responses in Bacteria

85
Bacteria have global regulatory systems that control several types of stress mechanisms. These include Pho regulon and the heat shock response, which are essential systems for environmental adaptation, such as nutrient limitation and proteotoxic stress. The Pho regulon and the heat shock response exemplify bacterial resilience, enabling rapid adaptation to fluctuating environmental conditions.Pho RegulonBacteria require phosphorus for essential cellular processes, including nucleic acid...
85

You might also read

Related Articles

Articles linked to this work by shared authors, journal, and citation graph.

Sort by
Same author

Progenitor stage-specific activity of a cis-acting double GATA motif for Gata1 gene expression.

Molecular and cellular biology·2014
Same author

Rarity of the Alzheimer disease-protective APP A673T variant in the United States.

JAMA neurology·2014
Same author

MicroRNA-543 acts as an oncogene by targeting PAQR3 in hepatocellular carcinoma.

American journal of cancer research·2014
Same author

The association between discrimination and depressive symptoms among older African Americans: the role of psychological and social factors.

Experimental aging research·2014
Same author

Residual decline in cognition after adjustment for common neuropathologic conditions.

Neuropsychology·2014
Same author

Differential behavior patterns in cynomolgus monkey Macaca fascicularis in home cage in response to human gaze.

Journal of medical primatology·2014

Related Experiment Video

Updated: Sep 27, 2025

Production of Arbuscular Mycorrhizal (AM) Fungal Inoculum and Phenotypic Evaluation of Rice and AM Symbiosis Under Saline Conditions
07:43

Production of Arbuscular Mycorrhizal (AM) Fungal Inoculum and Phenotypic Evaluation of Rice and AM Symbiosis Under Saline Conditions

Published on: March 14, 2025

359

Linking Bacterial Growth Responses to Soil Salinity with Cd Availability.

Lifu Wang1, Luyao Qin1, Xiaoyi Sun1

  • 1Key Laboratory of Plant Nutrition and FertilizerMinistry of Agriculture and Rural Affairs/Institute of Agricultural Resources and Regional Planning, Chinese Academy of Agricultural Sciences, No. 12 Zhongguancun South Street, Beijing, 100081, People's Republic of China.

Bulletin of Environmental Contamination and Toxicology
|April 8, 2022
PubMed
Summary

Saline stress significantly impacts soil cadmium (Cd) availability and bacterial communities. Increased salt concentrations reduce bacterial growth while enhancing Cd availability, highlighting the interconnectedness of soil health factors.

Keywords:
Bacterial growthCd availabilitySEMSalinity stressSoil properties

More Related Videos

Two-Dimensional Visualization and Quantification of Labile, Inorganic Plant Nutrients and Contaminants in Soil
12:03

Two-Dimensional Visualization and Quantification of Labile, Inorganic Plant Nutrients and Contaminants in Soil

Published on: September 1, 2020

6.3K
Monitoring Intraspecies Competition in a Bacterial Cell Population by Cocultivation of Fluorescently Labelled Strains
06:45

Monitoring Intraspecies Competition in a Bacterial Cell Population by Cocultivation of Fluorescently Labelled Strains

Published on: January 18, 2014

8.7K

Related Experiment Videos

Last Updated: Sep 27, 2025

Production of Arbuscular Mycorrhizal (AM) Fungal Inoculum and Phenotypic Evaluation of Rice and AM Symbiosis Under Saline Conditions
07:43

Production of Arbuscular Mycorrhizal (AM) Fungal Inoculum and Phenotypic Evaluation of Rice and AM Symbiosis Under Saline Conditions

Published on: March 14, 2025

359
Two-Dimensional Visualization and Quantification of Labile, Inorganic Plant Nutrients and Contaminants in Soil
12:03

Two-Dimensional Visualization and Quantification of Labile, Inorganic Plant Nutrients and Contaminants in Soil

Published on: September 1, 2020

6.3K
Monitoring Intraspecies Competition in a Bacterial Cell Population by Cocultivation of Fluorescently Labelled Strains
06:45

Monitoring Intraspecies Competition in a Bacterial Cell Population by Cocultivation of Fluorescently Labelled Strains

Published on: January 18, 2014

8.7K

Area of Science:

  • Environmental Chemistry
  • Soil Science
  • Microbiology

Background:

  • Saline stress is a growing environmental concern affecting soil properties and microbial life.
  • Cadmium (Cd) contamination poses risks to ecosystems and human health.
  • Understanding the interplay between salinity, soil contaminants, and microbial communities is crucial for environmental management.

Purpose of the Study:

  • To investigate the effects of saline stress on cadmium (Cd) availability in soil.
  • To assess the impact of different salt types (NaCl and Na2SO4) on soil physicochemical properties and microbial responses.
  • To determine the relationship between bacterial community tolerance, growth, and Cd availability under saline conditions.

Main Methods:

  • Addition of NaCl and Na2SO4 salts to soil at varying concentrations.
  • Measurement of soil physicochemical properties, including DTPA-extractable Cd.
  • Assessment of microbial activity through respiration and biomass measurements.
  • Estimation of bacterial community salinity tolerance using the pollution-induced community tolerance (PICT) method and logistic equations to determine the EC50.

Main Results:

  • Increased salt concentrations (18 g kg-1) of NaCl and Na2SO4 significantly elevated available Cd content (17.80%-29.79%).
  • Bacterial respiration, biomass, and relative growth rates decreased with rising salinity levels.
  • The salinity tolerance index (EC50) of the bacterial community ranged from 4.32-12.63 g kg-1.
  • Structural equation modeling confirmed that soil salinity stress directly influences Cd availability and bacterial communities, with bacterial growth characteristics also playing a role in reducing available Cd.

Conclusions:

  • Saline stress alters soil cadmium availability by affecting soil bacterial community growth characteristics.
  • Bacterial communities exhibit varying salinity tolerance levels, influencing their response to contaminants.
  • Management strategies for saline soils must consider the combined effects on contaminant bioavailability and microbial health.