الفهرس 
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Abstract
Barley (Hordeum vulgare L.) is widely grown in arid and semiarid regions of the mediterranean for forage purposes as a grain crop .
It is rated as a moderately tolerant forage crop and a highly tolerant grain crop .Barley is the fourth most important cereal crop in the world .
In conclusion the results of present investigation indicated that salt tolerant genes are plasmid-borne in most Azotobacte strains.
Azotobacter salt tolerant mutants induced in this study were efficient in secrete IAA as a plant hormone.
In addition, Azotobacter inoculants induced improved vegetative and biochemical traits of barley such as grains protein content and chlorophyll formation under abiotic stress.
A barley crop Family grassy spread the important cultivated all over the world because of the interest they have food rich in protein and vitamins and is used in many food industries and pharmaceuticals.
It has a high capacity to withstand saline soil conditions .
Resulted from this study that most of the fertilizer produced a significant increase in the vital qualities of the growth of the barley crop plants is higher than the non-vaccinated through the experience of pots .
We conclude that mutations Alozutobkatr tolerant of salinity had a positive impact on improving the rate of growth of barley plants in addition to improving the chemical qualities of growth and yield and its components in addition to carrying these mutations salinity to a range between 1.6 -10 % seawater .
Salinity is considered one of the most important natural stress factors that affect the normal distribution of plants
And M. Tule very serious problem in some agricultural areas . Limiting salt stress of growth of leguminous plants
Especially when these crops depend on the installation of nitrogen Takaful .
This study used five strains Alozotobakatr exposed to different concentrations of water
Sea . Purpose of obtaining salinity -tolerant mutants were selected from two salt-tolerant mutants of
Each strain on the basis of their production of indole acetic acid for use in vaccination barley plants .
The summarized results obtained from this study are as follows:
1 - A Alozotobakatr appeared all strains highly resistant to both antibiotics which Alkruaminevikol
AC-, AV- 14644 while the strains . AV- and Aldjura_iv and Ampicillin except strain 4204
14350 Mquaomtin to all antibiotics except neomycin .
) AV-2 - ITM to eradicate the genes of resistance to antibiotics for four bacterial strains are 14644
Except resistance genes for antibiotic ) AV- resistance genes , except for the antibiotic Ampicillin ) 0.4204
And so exposing these strains to temperature 37 AV-14641, AC- Alkruaminevikol ) 14346
Degrees Celsius .
3 - failed all isolates that Astis late genes , including resistance to antibiotics in the formation of colonies
. AV-14641, AC- bacterial salt on the environment , except for strains 14346
AZr isolation and AV-4 - a result of mutations , except for salt-tolerant isolates resulting from strain 14641
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Significant increase in the production of indole acetic acid compared with the average parents .
- N Tg of the type of soil significant differences in growth traits , which include weight and total root
Vegetative at the age of 60 and 160 days and leaf area , plant height , number of branches at the age of 160 days
2009 , during the seasonal growth in 2008
6 - A vaccinations appeared Alozutobkatr significant increase in the growth of root , shoot at the age of
During the growing season, 2009) , the space AC-14364, AV-60 and 160 days (except strains 4204
. Paper , plant height compared to non- fertilized plants during the seasonal growth 2009.2008
7 - T. fact that a number of significant number of branches in response to vaccination in all except three Almlqahat vital pollinators are
AZr, AC-14364
. At the age of 160 days during the growing season 2008 AV-2 and 1464.