influence of NaCl on germination and Ion contents of two wheat cultivars differing in salt tolerance effect of gilbberellic acid

ABSTRACT

Effect of 100 mM NaCl on seed germination, plumule and radicle elongation and interaction of GA with NaCl were examined in 2 wheat genotypes differing in salt tolerance. NaCl stress reduced seed germination rate equally in both cultivars. However, NaCl-induced reduction in plumule and radicle elongation in Giza 157 [sensitive cultivar] was greater than in Sakha 8. Salinity stress increased accumulation of Na and Cl while it decreased K accumulation in germinating seeds, and more reduction in Giza 157. Gibberellic acid [105 M] partially alleviated the inhibitory effect of NaCl stress on seed germination, plumule and radicle elongation. Gibberellic acid added to NaCl increased K content and decreased Cl and Na accumulation in germination seeds. The effect of salinity stress on germination, ion accumulation and the interaction of gibberellic acid with salinity was discussed