Subject Areas : Journal of Plant Ecophysiology

khadijesadat  tahamtan ¹ (گروه زراعت و اصلاح نباتات، واحد ارسنجان، دانشگاه آزاد اسلامی، ارسنجان، ایران)
omid  alizadeh ² (گروه شناسایی و مبارزه با علف های هرز، واحد شیراز، دانشگاه آزاد اسلامی، شیراز، ایران)
barmak  jafari haghighi ³ (گروه زراعت و اصلاح نباتات، واحد ارسنجان، دانشگاه آزاد اسلامی، ارسنجان، ایران)

Received: 2015-05-15 Accepted : 2015-05-15 Published : 2015-05-01

Keywords: Drought stress, Naked barley, physiologic parameters, osmotic adjustment,

Abstract :

In order to study the effect of abscisic acid and brassinosteroid on proline accumulation and photosynthetic pigments content and leaf area duration in naked barley (Hordeum Vulgare L.) under different irrigation levels the pot experiment was conducted based on factorial as Completely Randomized Design with three replications in Islamic azad University of Arsanjan. Factors were consisted of irrigation in two levels (field capacity and 50% field capacity) and foliar spray of abscisic acid and brassinosteroid in flowering stage (control and 4 ppm ABA and 10 ppm brassinosteroid and 4 ppm ABA + 10 ppm brassinosteroid). Results showed, water deficit stress caused increasing proline, chlorophyll a and b and carotenoid in naked barley and leaf area duration was decreased by water deficit stress. Application of brassinosteroid increased damages of water deficit stress but abscisic acid or brassinosteroid + abscisic acid decreased the damages of water deficit stress in naked barley by photosynthetic pigments content.