The quantity and activity of plasma membrane (PM) H+-ATPase of the vesicles isolated from leaf tissues of nitrate-treated plants for 12 h (peak of nitrate foliar uptake rate) increased with respect to that observed in the vesicles isolated from N-deprived control plants, thus suggesting an involvement of this enzyme in the leaf nitrate uptake process similar to that described in roots.
This study suggested that utilization of the salt-tolerant cultivar (Pishgam) combined with proper foliar application of potassium nitrate (2 mmol L−1) and silicon (4 mmol L−1) at the wheat booting stage might be a promising approach to obtain higher grain yield on saline lands.
A product of this gene may play a role, at least in part, in the process of nitrate uptake in foliar tissues [ 22].
Data obtained using isolated plasma membrane vesicles from leaves of cucumber plants treated for 12 h with nitrate (peak of nitrate foliar uptake rate) show, for the first time, that also in this tissue the activity and quantity of the plasma membrane proton pump increase This finding suggests an involvement of the enzyme in the nitrate uptake process in leaves similar to that described in roots.
In the greenhouse experiment, Pishgam was grown in a hydroponic system subjected to different NaCl levels (20, 60 and 100 mmol L−1) and treated by silicon (0, 2 and 4 mmol L−1, final concentration in nutrient solution using K2SiO3) and potassium nitrate (0, 0.5, 1, and 2 mmol L−1, foliar application).
Moreover, the increase in the protein content and nitrate reductase activity at lower concentrations of SLE confirmed the efficiency of foliar spray as it enhanced the absorption of most of the necessary elements by the seedlings.
Chronically elevated N deposition is theorized to induce a series of changes in ecosystem processes, including increases in foliar and soil N, decreases in soil C N ratio, increases in the net production of nitrate in soil, and increased leaching of N, largely nitrate, in streamwater.
100% pure ammonium nitrate.
"Nadia" was nitrate, Ahmad explained.
Just use commercial foliar fertilizer in spring and summer, when they are in active growth.
