Cotton Genomics and Genetics 2016, Vol.7, No.1, 1-7
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1 Results
The problem of salinity is becoming more alert due to improper agricultural management practices, irrigation of
cultivated lands with saline water, poor drainage system and low precipitation (Zhang et al., 2012). It is known
that cotton seed germination and seedling periods are very sensitive to any level salinity (Ahmad et al., 2002).
Several studies have suggested that inoculation with beneficial bacteria all roots have the remarkable ability to
secrete exudates like phytohormones or and/or ammonium production into the rhizosphere in response to biotic
and abiotic stresses (Bertin et al., 2003; Egamberdieva, 2009). Behl et al., (2012) observed nitrogen-fixing and
phosphate-mobilizing bacteria, as well as mycorrhizal fungi, can influence plant nutrition beneficially and thus be
used as biofertilizers in agriculture. Biomass and yield improvement due to symbioses depends on nutrient
absorbing efficiency of the bacterial symbiont (Khaitov and Teshaev, 2015). A research was conducted in saline
and non saline conditions of Uzbekistan revealed the positive effects of bacterial fertilizers on cotton germination,
growth and yield under long-term irrigated cotton monoculture.
The use of the four bacterial fertilizers improved seedling growth in non-stressed conditions and also ameliorated
the negative effects caused by salt stress on cotton seedlings. Cotton seed germination declined significantly (18%)
in saline soil conditions (56%) of Sirdarya region compare favourable (74%) soil condition of Tashkent region.
The cotton seed germination increased significantly after application of bacterial fertilizers BIST and Subtin
compare to control both on saline and not saline soils (Figure 1). Bacterial fertilizer Subtin showed the highest
result around 90% seed germination on not saline condition and on saline condition germination rate was 80%.
While in control germination rate was 56% on saline condition and 74% on favourable not saline condition. From
the results we revealed that growth stimulation of cotton by bacterial inoculants is affected by salinity thereby
bacterial fertilizers had ability to improve growth conditions of cotton seedlings. Some authors have pointed out
that most bacterial strains help the cotton plant to uptake K, N and P as well as many microelements from the soil,
thereby, serve as biological stimulators (Khaitov and Teshaev, 2015; Egamberdieva, 2009).
Figure 1 Cotton seed germination in saline and not saline field condition and effect of bacterial fertilizers
The salinity is unfavourable for cotton plants which positively responding to bacterial inoculation. Several
researchers have reported that the application of bacterial fertilizers based on endogenous beneficial strains can
stimulate plant cell proliferation, which in turn results in an enlarged root system and enhances the utilization of
important nutrients from the soil (Egamberdieva, 2009; Khan et al., 2011).
The shoot and root growth stimulated significantly after application of bacterial fertilizers compare to control. All
bacterial fertilizers showed stimulation effect in saline and favourable conditions. Among used bacterial fertilizers
