Cotton Genomics and Genetics 2016, Vol.7, No.1, 1-7
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Subtin and BIST showed more increase of plant dry shoot and root weights. The application of cotton with
bacteria fertilizers significantly increased the shoot dry weights from 6 to 16% as compared to the control.
Bacterial fertilizers affected positively the early plant growth of cotton. The inoculation of cotton seed with
bacterial fertilizers Best significantly (p˂0.05) increased the shoot and root dry weights from 13% and 6% as
compared to the control in not saline and 16 and 7% in saline soil condition. Bacterial fertilizer Fitobisol also
positively influenced in saline soil condition and significantly increased shoot and root dry weight up to 16 and
7% respectively in non saline condition and 14 and 7% in saline condition. Yer malhami has a little effect in
cotton shoot and root dry weight while increasing 9 to 2% over the control in favourable non saline soil condition
but in saline soil condition shoot and root dry weight increased 10 and 3% respectively. The most effective plant
growth promoting bacterial fertilizer was Subtin which generated shoot and root dry weight 19 and 7 % increase
in non saline condition while in saline condition these increases was 17 and 10% in over the control (Figure2).
In our study we revealed that increased salinity causes to decreased root weight. A similar result was observed by
Demir and Arif (2003), who reported that the root growth of safflower was more inhibited by salinity than shoot
growth.
Figure 2 Cotton dry shoot and root weight in saline and not saline condition and effect of bacterial fertilizers
Most of bacterial fertilizers reacted antagonistically against plant pathogens and significantly decreased root rot
deceases (data not shown). Thereby, served to providing healthy and uniform growth of cotton plants in field
condition. According to Kamilova et al, (2008) reported that beneficial bacterial strains produce indole acetic acid
and are able to reduce the infection rate of soil borne diseases. These beneficial bacteria, called plant growth
promoting rhizobacteria (PGPR), inhabit plant roots and affect plant growth promotion by mechanisms such as
increased solubilization and uptake of nutrients and/or production of plant growth regulators (Farajzadeh et al,
2012). Several authors reported that the inoculation with azotobacteria also positively affects the plant growth and
yields due to an increase in fixed nitrogen content of soil, and microbial secretion of stimulating hormones like
gibberellins, auxins, and cytokinins (Penrose and Glick, 2003; Radwan, 1998).
The main component for producing of cotton is for fibre and secondly for oil production purpose. In our research
we revealed that at saline condition the cotton yield was lower than non-saline condition. But bacterial fertilizers
could increase the yield of cotton significantly in saline soil condition and also, non saline soil conditions.
Accordingly, promising results were achieved by the use of bacterial fertilizers Subtin and Fitobisol that could
