عنوان مقاله [English]
To study the efficiency of salt-tolerant plant growth-promoting rhizobacteria, on salt resistance of wheat plant (Triticum aestivum L) at growth stage, some strains isolated from the rhizosphere of halophyte plant rhizosphere which were collected from the deserts of four provinces (Isfahan, Yazd, Golestan and Hormozgan) of Iran. All strains were screened on their ability as salt tolerant, phosphate solubility, Auxin, siderophore and hydrogen cyanide (HCN) production. 10 isolates from a total of 50 isolates were salt tolerant to 5-20 percent salinity and have plant growth promoting (8 isolates isolates were able to solubilize insoluble phosphate and 6 isolates produced Indole-3-acetic acid (IAA). Only two isolates produced siderophore and none of the isolates had the ability to produce cyanide hydrogen. Effects of 10 salt tolerant bacteria and two salt treatments (zero and 100 mM) on growth of A pot experiment as a factorial experiment in a completely randomized design with three replications with two factors including bacteria (10 salt tolerant bacteria) and salinity in salinity levels (zero and 100 mM). The effect of PGPR on root and shoot dry weight, total dry weight, the amount of ethylene on Ghods wheat in saline conditions showed that the inoculation with selected bacteria in modulating the negative effects of salinity on growth period of wheat has been effective. Total dry weight (261%), shoot (390%) and root dry weight (270%) increased compared with control treatment and decreased levels of ethylene (24%) in salinity.
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