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Title

EFFECTS OF SALINITY STRESS ON GROWTH AND PHYTOHORMONE CHANGES OF WHEAT INOCULATED WITH PLANT GROWTH PROMOTING BACTERIA AND HUMIC ACID

Pages

 Start Page 350 | End Page 367

Abstract

 Wheat crop, considering its high planting area and consumption at national scale, demand a regular yield increase. HUMIC ACID, as an organic acid obtained from humus and organic sources without any environmental destructive effects and PLANT GROWTH PROMOTING BACTERIA through the effects of hormonal and nutrient improve uptake to raise grain yield in WHEAT, especially in terms of SALINITY can be effective. The effects of SALINITY on growth and changes PHYTOHORMONE in WHEAT inoculated with PLANT GROWTH PROMOTING BACTERIA and HUMIC ACID, an experiment was conducted in 2010 at research greenhouse, Faculty of Agriculture and plant breeding, Islamic Azad University of Karaj Branch. A completely randomized block design with three replications was using analysis of factorial. experimental treatments included two levels of HUMIC ACID {(A0): Control, (A1): HUMIC ACID consumption}, and SALINITY levels in the three levels of {(B0): Control, (B1): Low SALINITY of 75 mM, (B2): High SALINITY of 150 mM}, the use of microorganisms in the five levels of {(C0): Control, (C1): Grain inoculation with Azospirillum lipoferum , (C2): Grain inoculation with Azotobacter chroocccum, (C3): Grain inoculation with Pseudomonase putida, (C4): The mix grain inoculation with (Azotobacter chroocccum, Azospirillum lipoferum, Pseudomonase putida)}.The results showed the effect of grain inoculation with PLANT GROWTH PROMOTING BACTERIA and HUMIC ACID consumption during exercise SALINITY on Grain yield, Gibberellins, Auxins and Cytokinin was significant. The highest grain yield of treatments inoculated with Azetobacter chroocccum bacteria and HUMIC ACID no consumption and the SALINITY was 75 mM, and Most of Cytokinin and Gibberellins hormone with the treatment grain inoculation with Azospirillum lipoferum and HUMIC ACID no consumption and salt stress of 150 mM was while the highest Auxin hormone with the mix treatment inoculation with PLANT GROWTH PROMOTING BACTERIA and HUMIC ACID consumption and no SALINITY stress (control).

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