Abstract
The effect of two N-forms (NH4 + and NO3 −) and NaCl on pattern of accumulation of some essential inorganic nutrients was examined in sunflower (Helianthus annuus L.) cv. Hisun 33. Eight-day-old plants of were subjected for 21 d to Hoagland's nutrient solution containing 8 mM N as NH4 + or NO3 ·, and salinized with and addition of NaCl to the growth medium had no significant effect on total leaf N. However, root N of NH4-supplied plants decreased significantly with increase in NaCl concentration, whereas that of NO3-supplied plants remained unaffected. There was no significant effect of NaCl on leaf or root P, but the NO3-supplied plants had significa concentration of leaf P than that of NH4-supplied plants at varying salt treatments. Salinity of the rooting med did not show any significant effect on Na+ concentrations of leaves or roots of plants subjected to two differen N. NH4-treated plants generally had greater concentrations of Cl− in leaves and roots and lower K+ content in leaves than NO3-supplied plants. Ca2+ concentrations of leaves and roots and Mg2+ concentrations of leaves decreased in NH4-supplied plants due to NaCl, but they remained unaffected in NO3-treated plants.
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Ashraf, M., Sultana, R. Combination Effect of NaCl Salinity and Nitrogen Form on Mineral Composition of Sunflower Plants. Biologia Plantarum 43, 615–619 (2000). https://doi.org/10.1023/A:1002860202032
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DOI: https://doi.org/10.1023/A:1002860202032