Effect of Aspirin spraying on some morphological characteristics of two cultivators of (Helianthus annuus L.) exposed to drought stress

Abstract

A two filed experiment was conducted in botanical garden of Department of Biology, Collage of Education for Pure Science (Ibn-Al-Haithem) , University of Baghdad during the growth summer season of 2013. The experiment aimed to study the effect of drought stress and aspirin spraying and interaction between them in som morphological characteristics of two cultivators of Helianthus annuus L., the treatment of drought stress were irrigation every seven day and 14 days while concentration of aspirin are 0, 50, 100, ppm ,the results indication that the effect of drought stress divergence from seven day to irrigation every 14 days decreased plant height 14.16%, 12.64% stem diameter 24.13%, 16.91%, leaves number 18.94%, 16.48% chlorophyll content 9.94%, 3.38% in local and hibrides cultivation respicatly.Aspirin spraying showed asignifical increase with 100 ppm concentration in plant height 44.16%, 21.22%, stem diameter 36.86%, 54.76, leaves number 34.37%, 34.17%, chlorophyll content 28.36. 13.36% and leaf area 77.25%, 57.42% in local and Hibirde cultivators respicatlly.The effect of the interationbetween the drought effect and the aspirin was significant, the aspirin alivatethe effect of drought stress in al characteristic particularly in the concentration 100 ppm.