What is the meaning of salt tolerant?
The salt tolerance of a plant is often defined as the degree to which the plant can withstand, without significant adverse effects, moderate or high concentrations of salt in water on its leaves or in the soil within reach of its roots. In practice, salt tolerance is a relative term.
How is salt tolerance measured?
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 salt stress tolerance?
Salt stress affects different aspects of plant metabolism and structure. Salinity induces cellular adjustment with a significant reorganization of cell structure and metabolism due to ionic and osmotic effects. Proteins play a key role in salt tolerance, acclimatization and cellular adjustment.
Which is salt tolerant crop?
Salt tolerance of cereal crops Most of the major cereal crops exhibit high tolerance to soil salinity. In this group are sorghum, wheat, triticale, ripe, oats and barley. Only exceptions are corn and rice.
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.
What is meant by Stenohaline?
Definition of stenohaline of an aquatic organism. : unable to withstand wide variation in salinity of surrounding water.
What is the principle of salt tolerance test?
The ability of the bacteria to grow in the presence of variable amount of Sodium Chloride (NaCl) has been used to characterize several bacteria. It takes into account the organism’s ability to tolerate various osmotic concentrations. E.
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 viridians streptococci.
What refers to the salt content of water?
The term “salinity” refers to the concentrations of salts in water or soils.
How is soil salinity measured?
In the laboratory, soil salinity is usually assessed by determining either the total soluble salts by evaporation of a soil water extract (TSS), or by determining the electrical conductivity (EC) of either a 1:5 distilled water:soil dilution, or a saturated paste extract.
What is salt exclusion?
Salt exclusion: The ability to exclude salts occurs through filtration at the surface of the root. Root membranes prevent salt from entering while allowing the water to pass through. The red mangrove is an example of a salt-excluding species.
How is wheat tolerant to salt?
Wheat (Triticum aestivum) is a moderately salt-tolerant crop (Maas and Hoffman, 1977). In the field, where the salinity rises to 100 mM NaCl (about 10 dS m−1), rice (Oryza sativa) will die before maturity, while wheat will produce a reduced yield.
What is the difference between salt tolerance and salt tolerance media?
Salt acts as a selective agent and interferes with membrane permeability and osmotic equilibrium. The salt tolerance medium is a selective and differential medium in which salt-tolerant organisms will produce heavy growth in the broth and on solid agar within 48 hours.
What is tolerance tolerance in measurement?
Tolerance can be defined as the total allowable amount by which a measurement may vary. It is the difference between the maximum and minimum limits. As an example, a dimension may be given as 1.525″ ±0.002″ which means that the manufactured part may be 1.527″ or 1.523″, or anywhere in between these limit dimensions.
What is salt tolerance test for Enterococcus?
Salt tolerance (6.5% NaCl) test. A, Positive. B, Negative It is used to differentiate enterococci (positive) from non-enterococci (negative). It is used to differentiate non-beta-hemolytic strains of catalase- negative, gram-positive cocci (i.e. Enterococcus and Aerococcus) based on their ability to grow in a 6.5% sodium chloride broth.
What is the difference between tolerance and allowance?
Tolerance is linked with the basic dimension of the part being manufactured limited by the least count (the smallest measurement that a device can measure). While allowance describes how two parts will fit together. For a good fit between two parts, a deliberate amount of allowance is always given.