THE ROLE OF NAA IN THE REGULATION OF MINERAL CONCENTRATION OF DATE PALM SEEDLINGS ('SHABEEBY') UNDER SALT STRESS CONDITIONS
In many countries including Qatar, salinity in irrigation water is a serious problem for agriculture.
Irrigation with saline water reduces the plant growth and productivity of most fruit trees.
An experiment was carried out at the Research Station of Qatar University, to study the effect of NAA on mineral concentrations of date palm (Phoenix dactylifera L. Shabeeby) seedlings.
The effects of NAA alone (0, 150 , 300 mg/L) or in combination with NaCl and NaCl alone )0, 6000, 12000, 18000 mg/L) added to the irrigation water were studied.
After 115 days from the first treatment, concentrations of N, Ca, Mg, Cu, Mn, Zn in leaves and N, P, K, Ca, Mg, Cl, Cu, Mn, Zn and Fe in roots significantly increased with the application of high NAA in Shabeeby date palm seedlings.
High salinity concentrations in irrigation water decreased leaf P, Cu, Mn, Zn and Fe but increased K, Na and root Cl and Cu concentrations relative to the control seedlings. The combination of high NAA with high salinity in irrigation water reduced the adverse effects of salt, preventing the reduction of most mineral elements in leaves and increased the concentrations of others in roots. However, the increases of Na in leaves and Na, Cl, N, P, Ca and Mg in roots with the application of high NaCl in combination with high NAA concentrations in irrigation water, without any symptoms of NaCl stressed indicated that the high accumulation of Na, Cl and other elements might have played an important role in osmotic adjustment in vacuoles and that it improves the water balance of Shabeeby seedlings. Compared to high NaCl concentration used alone, the irrigation of date palm seedlings with a high concentration of NAA in combination with salts added to the water reduced the adverse effects of salt by preventing the reduction of mineral elements concentration in leaves and increased the element concentrations in roots.
High salinity concentrations in irrigation water decreased leaf P, Cu, Mn, Zn and Fe but increased K, Na and root Cl and Cu concentrations relative to the control seedlings. The combination of high NAA with high salinity in irrigation water reduced the adverse effects of salt, preventing the reduction of most mineral elements in leaves and increased the concentrations of others in roots. However, the increases of Na in leaves and Na, Cl, N, P, Ca and Mg in roots with the application of high NaCl in combination with high NAA concentrations in irrigation water, without any symptoms of NaCl stressed indicated that the high accumulation of Na, Cl and other elements might have played an important role in osmotic adjustment in vacuoles and that it improves the water balance of Shabeeby seedlings. Compared to high NaCl concentration used alone, the irrigation of date palm seedlings with a high concentration of NAA in combination with salts added to the water reduced the adverse effects of salt by preventing the reduction of mineral elements concentration in leaves and increased the element concentrations in roots.
Aljuburi, H.J., Maroff, A.M., Wafi, M.K. and Al-Far, M. (2010). THE ROLE OF NAA IN THE REGULATION OF MINERAL CONCENTRATION OF DATE PALM SEEDLINGS ('SHABEEBY') UNDER SALT STRESS CONDITIONS. Acta Hortic. 882, 121-129
DOI: 10.17660/ActaHortic.2010.882.13
https://doi.org/10.17660/ActaHortic.2010.882.13
DOI: 10.17660/ActaHortic.2010.882.13
https://doi.org/10.17660/ActaHortic.2010.882.13
Phoenix dactylifera, irrigation, salt water, NAA, leaves, roots, concentrations, NaCl
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