Salinity stress is known to retard plant growth through its influence on vital facets of plant me... more Salinity stress is known to retard plant growth through its influence on vital facets of plant metabolism, including disturbing the concentration of endogenous plant hormones. This disturbance can affect the growth and development of plants. It may be possible to improve the endogenous hormone balance by applying exogenous hormone. The application of NAA in combination with salts reduced accumulation of Na, Cl in leaves. An experiment was conducted at the Research Station of Qatar University to study the effect of IAA, NAA, and a mixture of IAA and NAA and different concentrations of sea water alone or in combination with growth regulators on properties and mineral contents of date palm (Phoenix dactylifera L., cv. Hatamy) seedlings. Salinity in irrigation water reduced leaf and root Mn, Zu, Fe and leaf K, Ca, Mg concentrations and the ratio of K/Na and Mg/Ca, but increased leaf N and leaf and root P, Cu, Na and Cl concentrations, compared with untreated seedlings. Compared to sea water alone, the irrigation of Hatamy seedlings with naphthalene acetic acid in combination with sea water, reduced the adverse effects of salt by reducing Na accumulation in the leaves and roots and Cl in the leaves and the ratio of Mg/Ca in leaves and roots and increasing the N, P and Fe concentrations, the ratio of K/Na in the leaves and roots, and Ca, Mg levels in the roots, number of roots and shoot dry matter percentage of seedlings over the using sea water alone.
In many countries including Qatar, salinity in irrigation water is a serious problem for agricult... more 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.
Salinity stress is known to retard plant growth through its influence on vital facets of plant me... more Salinity stress is known to retard plant growth through its influence on vital facets of plant metabolism, including disturbing the concentration of endogenous plant hormones. This disturbance can affect the growth and development of plants. It may be possible to improve the endogenous hormone balance by applying exogenous hormone. The application of NAA in combination with salts reduced accumulation of Na, Cl in leaves. An experiment was conducted at the Research Station of Qatar University to study the effect of IAA, NAA, and a mixture of IAA and NAA and different concentrations of sea water alone or in combination with growth regulators on properties and mineral contents of date palm (Phoenix dactylifera L., cv. Hatamy) seedlings. Salinity in irrigation water reduced leaf and root Mn, Zu, Fe and leaf K, Ca, Mg concentrations and the ratio of K/Na and Mg/Ca, but increased leaf N and leaf and root P, Cu, Na and Cl concentrations, compared with untreated seedlings. Compared to sea water alone, the irrigation of Hatamy seedlings with naphthalene acetic acid in combination with sea water, reduced the adverse effects of salt by reducing Na accumulation in the leaves and roots and Cl in the leaves and the ratio of Mg/Ca in leaves and roots and increasing the N, P and Fe concentrations, the ratio of K/Na in the leaves and roots, and Ca, Mg levels in the roots, number of roots and shoot dry matter percentage of seedlings over the using sea water alone.
In many countries including Qatar, salinity in irrigation water is a serious problem for agricult... more 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.
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