dear Alireza
1.salinity in soil cause imbalance in ions and nutrient uptake.
2. when your soil is salty, soil water potential will be decreased and plants roots can not absorb water well.as you know every nutrient in soil have to dissolved in water to be absorbed by roots. the less water absorption means less nutrient uptake. and this leads to reductions in the growth rate.
3.The salt in the soil solution (the “osmotic stress”) reduces leaf growth and to a lesser extent root growth, and decreases stomatal conductance and thereby photosynthesis.
good luck
Moreover, dry matter (concentration) increases parallel with decrease of growth rate. Plants could survive, but metabolism includes alternative pathways, like in the other stress conditions. Chemical composition of plants grown on saline soil is altered and if edible plants are considered, nutritional quality of green parts is under question.
Dear Alireza
salinity results in accumulation of certain salts & ions which results in salt excreation ,diluation ,avoidane,compartmentation, or cation anion exchang and son mechanisms are adopted to develop tolerance ,
sir it is better to go through Mass and Hoffmans ,Evans , Marchner , mengel and krikby , munns etc Review articles for your future referance
Salt stress usually increases the concentrations of the injurious ions (Na, Cl) and decreases the beneficial ones (K, Ca, No3 ....etc) in plants. As a mechanism, plants cope with that to exclude or store Na in the vacuole. For tolerant plants, they maintain K level either by declining its efflux or increase its influx through various plasma membrane transporters.
soil Salanity did not increase the nutrients in soil and reduce the uptake of nutriens by plants because the soil salinity is due to increase sulphate and chlored in soil, in addition, to icrease sodium concentration in soil extract. High concentrations of sodium ions were toxic to the plants and reduce the nutrients uptake by plants roots. Furthermor, the sodium change the exchangable cations perecentage of soil extract, . Also, the anions (Sulphate and chloride) are not nutrines to the plants.
No. Not at all. Salinity keeps most of the needed elements for the plants in the bound form in the soil. It is like water, water every where but not a drop to drink.
I respect to all answers, but the salinity in soil depends greatly on the level of salinity status in the soil and even the kind of salinity in which soil is known as a salty soil. In addition to these ,in return to the question, type of plant (crop,bush,or tree) is also must be taken into account as it is shows the resistant level in plants where they are growing on a salty soil. Normally, saltiness might decrease or even cease the amount of inflow materials and necessary elements in their way into the host plant. Even though type of salt stress would cause abiotic tension in the plant ;however, plants have their own strategy to cope with such situation . So, we can strongly denote that under saline soil condition regardless of type of plant ,the amount of nutritional elements will decrease to some amounts.
Now, the areas of salinity is very too much in world wise. I respect to all answers and most remarks that plant growth affected due to salinity. Yes, but these soil should be used for grow the salt tolerant trees and reduce the global warming of climate effects and also increase the forest area in globally.
Very lovely to me some arguments and statements. However, the salinity has a significant impact on the content of non-nutritive substances in the plant, caused by stress is caused by lack of possibility for the plant with water macro-and micronutrients. Such stressors are substances such as polyphenols or coumarin. The reaction of defense plants begin to emerge for some time in increased amounts in tissues, and in the case of coumarins and furanocoumarins can also be secreted outside the tissues. This is a very interesting phenomenon, especially because after a while all goes back to the initial state.
I greet all.
Soil salinity does not increase the plant nutrients. Actually, salt stress decreases beneficial ions such as K, Ca, Mg, nitrate, and others. What increases in plants under salinity is the toxic ions, e.g. Na and Cl.
greetings
Salinity is the most most dreaded form of stress, as salinity encroaches arable land day by day. The world population is steeply growing. In addition to cultivable land, one ought to exploit saline soil as well to feed the burgeoning population. Salinity is harmful to majority of crops. Therefore, induction of saline tolerance through transfer of genes or saline tolerant microbes is major area of research in agriculture
It is important to distinguish the source of salinity: 1. Salts (ıons) or 2) Fertilizers.
Dear colleague M. Mansour, does not increase the salinity of the soil nutrients, but affects the content of non-nutritive components in plants, most of which are secondary metabolites, called syresogennymi, which plants produce in greater quantities during various stressors such as cold weather, drought, damage mechanical, infections potogenne, pest infestations and the presence of salts in the soil solution or even unbalanced fertilization.
- Yes can salinity increase the plant growth only in the salt tolerance plants and in the plants which produced by transfornation of molecular genes.Example, the transformation of plants which could survive very well under high salt concentration to another than can not survive under these salinization stress.
Yes , there is every possibility . Soil salinity very often affects the plant growth adversely , with the result , there is differential accumulation of nutrients by the plant , depending upon number of factors . fro example , with salinity , reduced growth means reduced dry matter production, could bring higher concentration of nutrients like K, Fe, Zn , especially in perennial crops , since with such stress , vertical movements of some nutrients is curtailed , facilitating the horizontal movement , accumulation of some nutrients into the bark. You will find plenty of literature on this important issue...
plz tell me why the dry matter of potato tuber increase when increase salinity stress
Dear Moiz Uddin pl check the source sink relation ship and photosynthetic efficiency under saline and control conditions ,then we will conclude
In perennial trees , there are many instances where nutrient concentration increases on account of salinity-induced stress. Here is a comprehensive review on a crop like citrus...
With increase in salt concentration of the soil, the osmotic pressure of the soil solution increases and plant are not able to extract water as easily as they can from a relatively non-saline soil. Increasing salt concentration, the plants start severe water stress due to physiological unavailability of water. Thus, as water stress, concentration of nutrient increase in plant cell solution.
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