EFFECT OF 6-BAP GROWTH REGULATOR ON SEED PRIMING OF SEVERAL BREAD WHEAT VARIETIES UNDER WATER IRRIGATION SALINITY STRESS

Abstract

Two experiments were carried out under greenhouse conditions at the College of Agriculture - University of Anbar for the spring season 2018, using plastic seedlings containers on sandy soil to study the effect of 6 Benzylaminopurine growth regulator and used at a concentration of 250 mg l-1 on seedlings performance of six varieties of wheat, namely; IBA 99, Bohooth 10, Bohooth 22, Abu Ghraib, Bohooth 158 and Ezz under four levels of saline irrigation water 3.00, 4.50, 6.00 and 7.50 dS m-1 in addition to the comparison treatment distilled water 0 dS m-1. The results of the experiment showed that the low concentrations of salts in the nutrient medium activate the radicle growth in the wheat plant. The seeds of wheat germinated in the irrigated medium were outperformed with salty water 3.00 dS m-1 with the highest averages of the studied traits. Ezz cultivar was the most tolerant category of salinity of irrigation water compared to other cultivars. The results of the experiment also showed that soaking the seeds of wheat with a growth regulator solution 6-Benzylaminopurine contributed to reducing the negative effect resulting from the increase in saline stress in the germination medium which improved the seed germination and seed growth characteristics under saline stress. The research recommends using the Ezz variety in the event of high salinity in irrigation water, as well as treating the seeds with the 6-BAP growth regulator to increase the tolerance of seeds to the stress of irrigation water salinity.