Effect of plant growth promoting rhizobacteria and foliar application of amino acids and silicic acid on some physiological traits activity of wheat (Triticum aestivum) under drought stress

Drought is recently the major abiotic stress for plants because beside of crop rate, it causes restriction of water and useable land for agriculture. Many investigations showed that plant growth promoting, silicic acid and amino acids decreased several stresses including drought in plants. irrigation factor at two levels includes a1: control, a2: cut irrigation after flowering stage anol the second experimental treatment at the five levels includes: b1: control, b2: seed inoculated with bacteria (Azospirillum، Azotobacter، Pseudomonase), b3: seed inoculated with bacteria (Azospirillum، Azotobacter، Pseudomonase) and sprayed silicic acids, b4: seed inoculated with bacteria (Azospirillum، Azotobacter، Pseudomonase) and sprayed amino acids, b5: seed inoculated with bacteria (Azospirillum، Azotobacter، Pseudomonase) and sprayed silicic acids with amino acids in randomized complete blocks design with four replicates using analysis of split plot. Results showed that the drought stress reduced the traits measured but seed inoculated with the plant growth promoting, sprayed silicic acid and amino acids Both in terms of normal irrigation and drought stress conditions traits chlorophyll a, b, height, spike yield and seed yield increased. Also seed inoculated with the plant growth promoting and Consumption combined silicic acid and amino acid seed yield relative to control in terms of normal irrigation and drought stress, respectively %27/76 and %44/64 increase.