The Effect of Proline on Growth and Ionic Composition of Embryogenic Callus and Somatic Embryos of the date Palm (Phoenix dactylifera L. CV. ASHKAR) Under NACL Stress Journal title: International Journal of Farming and Allied Sciences Authors: M.F. Abbas, A.M. Jasim and B.H. Al-Zubaidy Subject(s): Agricultural Science, Biochemistry, Plant Sciences, Soil Sciences, Zoology and Animal Science, Agricultural Economics