WHEAT SEED PRIMING (Triticum aestivum L.) FOR TOLERANCE DROUGHT

Abstract

A field experiment was carried out in field crops Department field- Faculty of Agriculture-University of Baghdad during the season 2013-2014 The objective was to investigate the effect of seed priming wheat before sowing on the wheat plants tolerance to the drought compared with the non- priming seeds and its relationship with the Improving physiological traits and grain yield. Use the R.C.B.D design in the arrangement of split- plot with three replicates. The drought treatment (50,70,and 90%) depletion of available water of occupied the main plots. While seed priming treatments (Gibberellins ,Kinetin, Cycocel, Salicylic acid, KCL, Ascorbic acid ,Distilled water and Dry seeds). The results of the experiment showed no significant differences between moisture stress levels 50% and 70% in content chlorophyll and grain content, indicating 25% water availability. The average chlorophyll content increased from 78.4% for the treatment of the dry seeds to 87.4% when use Gibberellin increased by 11.47%. The interdiction between the levels of moisture stress and seed priming treatment indicates a difference in the behavior of seed priming coefficients towards moisture stress levels. This means the ability of growth regulators to induce broad antioxidant systems and provide protection for vegetable plastids and other cellular structures by reducing the toxic effects of stress free radicals Water and increase drought tolerance efficiency in wheat plant.