What bacteria can tolerate salt?
What bacteria can tolerate salt?
The diazotrophic salt-tolerant bacterial strains of Klebsiella, Agrobacterium, Pseudomonas, and Ochrobactrum isolated from the roots of a halophytic plant, Arthrocnemum indicum showed salinity tolerance ranging from 4 to 8% NaCl, and improved the productivity of peanut in saline as well as in control conditions (Sharma …
What does it mean if a bacteria is salt-tolerant?
Salt acts as a selective agent for bacteria and interferes with membrane permeability and osmotic equilibrium. A high salt concentration thus inhibits a range of bacteria but allows salt-tolerant organisms such as enterococci to grow.
Where could you find salt-tolerant bacteria?
Halotolerance is the adaptation of living organisms to conditions of high salinity. Halotolerant species tend to live in areas such as hypersaline lakes, coastal dunes, saline deserts, salt marshes, and inland salt seas and springs.
How you will isolate salt-tolerant bacteria from saline soil?
The isolation of salt-tolerant bacteria was done from the soil samples on different types of selective media such as Ashbys Mannitol Agar for Azotobacter and nonselective media such as Tryptone soya agar, Pikovasky’s Agar for phosphate-solubilizing bacteria and Jenson media for nitrogen-fixing bacteria [28].
What are the 3 types of halophiles?
According to their degrees of salt requirements, halophiles are classified into three groups: slight (0.34–0.85 M salt), moderate (0.85–3.4 M salt), and extreme halophiles (3.4–5.1 M salt) [2].
Is E coli a Halophile?
Comparison with non-halophilic representatives of the gamma-Proteobacteria (Escherichia coli, Pseudomonas aeruginosa, Vibrio cholerae) shows only a slight excess of acidic residues in the cytoplasmic proteins, and no significant differences were found in the acidity of membrane-bound proteins.
How do you test a salt tolerance for bacteria?
The salt tolerance test is performed using Tryptic Soy Broth with added sodium chloride (regular table salt) to create an overall salt concentration of 6.5%. It is a selective medium which tests the ability of an organism to survive in a salt-rich environment. Most organisms cannot survive in such an environment.
What is the function of halophiles?
Halophiles may serve as a source of many unique biomolecules, such as stable enzymes, biopolymers, and compatible solutes, and they may also be valuable for bioremediation and biofermentation processes, and other novel applications in agriculture and medicine [32].
What is the scientific name of halophiles?
Colloquial for halophilic archaebacteria (or archaea ), which are single-celled life forms. Synonyms: Haloarchaea (plural), haloarchaeon (singular). Halobacterium. The name of a genus of the archaeal family Halobacteriaceae (Grant, 2001). Halophilic.
Is Staphylococcus aureus a Halophile?
Staphylococcus aureus (S. aureus) is an extremely halotolerant pathogenic bacterium with high osmotic stress tolerance, and it is frequently encountered in aquatic production and preservation.
What is NaCl test?
Salt tolerance test is used in the identification of enterococcal group D Streptococcus on the basis of their salt tolerance. The ability of the bacteria to grow in the presence of a variable amount of sodium chloride (NaCl) has been used to characterize several bacteria, including viridans streptococci.
Why is salt tolerance important?
Salt stress inhibits photosynthesis by reducing water potential. So the main aim of salt tolerance is to increase water use efficiency under salinity.
How is salt tolerance measured?
SALINITY MEASUREMENT Soil salinity is determined by measuring the electrical conductivity of solution extracted from a water-saturated soil paste. Salinity is abbreviated as ECe (Electrical Conductivity of the extract) with units of decisiemens per meter (dS/m) or millimhos per centimeter (mmhos/cm).
How do salt tolerant plants work?
The plant absorbs salt from the soil and stores it in bladder-shaped cells on the surface of its leaves. This protects the salt-sensitive metabolic processes, and the plant can grow well even on saline soils.
How do plants tolerate salt?
Abstract. Plants exposed to salt stress undergo changes in their environment. The ability of plants to tolerate salt is determined by multiple biochemical pathways that facilitate retention and/or acquisition of water, protect chloroplast functions, and maintain ion homeostasis.
Is Pseudomonas aeruginosa a Halophile?
What is the mechanism of the salt tolerance?
Principle mechanisms include, but are not limited to, ion homeostasis and compartmentalization, ion transport and uptake, biosynthesis of osmoprotectants and compatible solutes, activation of antioxidant enzyme and synthesis of antioxidant compounds, synthesis of polyamines, generation of nitric oxide (NO), and hormone …