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Laboratory experiments were conducted at the laboratory of Seed Technology Research Section, Mansoura during 2013 and 2014 years to study the effect of soaking wheat seed of. Misr 1, Misr 2 and Gemmiza 10 cultivars in six salty solutions i.e. CaCl2 2%, CaCl2 4%, KH2PO4 1%, KH2PO4 2 %,KCL 2 %, KCL 4% and in addition to water and dry seed on germination percentage, seed and seedling vigor as well as seedlings chemical measurements under salinity conditions (0, 5 and 10 dS/m). The results revealed that: Increasing salinity levels not only reduced seed germination but also decreased seed vigor measurements which measured by (speed germination index, germination rate and co-efficient of germination). Seedlings measurements at the highest salinity levels (10 dS/m) were most weakness comparing (0 and 5 dS/m). Cholorophll a , b, carotenoids , K + content and K/ Na ratio decreased at high salinity levels. Misr 2 wheat cultivar showed superiority and recorded the highest values of water uptake %, seed and seedling vigor, chemical measurements and lowest Na + content .While, Gemmiza 10 wheat cultivar was the lowest of all studied measurements and the highest of Na + content. The highest values of seed, seedling vigor, chemical measurements (cholorophll a, b, carotenoids, K + contents, and K/Na ratio) and lowest Na + content in seedlings were obtained by wheat priming in KH2PO4 1%solution. In general, under salinity conditions, It could advised sowing seed of Misr 2 wheat cultivar and treated with KH2PO4 1%solution to improved seed germination, seedlings vigor and mitigation the harmful effect of salinity according to the obtained results in this investigation.

IMPACT OF PRIMING IN SALTY SOLUTIONS ON GERMINATION AND SEEDLING VIGOR OF SOME WHEAT CULTIVARS UNDER SALINITY CONDITIONS