The effect of inoculation with pseudomonas on wheat growth and some biological properties of a soil with Cd and salinity stresses

Document Type : Research Paper

Authors

1 Former student of MS of Shahid Chamran University of Ahvaz

2 Assistant professor, Shahid Chamran University of Ahvaz

3 Associate professor, Shahid Chamran University of Ahvaz

Abstract

Due to the problems of salinity and heavy metals in agricultural soils, this study was designed to evaluate the effects of inoculation of wheat (Chamran cultivar) with plant growth promoting bacteria on the reduction the effects of salinity and cadmium stresses. Experiment was designed as factorial arrangement with three factors including salinity (3 and 10 dS m-1), cadmium (0, 25 and 50 mg kg-1) and Pseudomonas bacteria (bacterial inoculated and non-inoculated) in a completely randomised design with three replications. After harvesting, some soil biological properties (soil respiration and soil microbial biomass) and some plant properties (dry weights and Ca, Mg, and Cd concentrations in plant shoot and root tissues) were measured. The results showed that basal respiration (14.6 mg CO2 100g-1 day-1), substrate induced respiration (93.2 mg CO2 100g-1 day-1), soil microbial biomass (13.4 mg 100g-1), dry weights of shoot and root (7.65 and 2.30 mg pot-1 respectivily), Ca concentration of shoot and root (3.12 and 5.92 mg kg-1 respectivily), and Mg concentration of shoot and root (3.16 and 6.75 mg kg-1 respectivily) decreased with increase in salinity and cadmium levels. Inoculation of Pseudomonas resulted in increase in these properties compare to non-inoculated treatments. Cd concentration of shoot and root (1.63 and 7.13 mg kg-1 respectivily) increased with increase in salinity and cadmium levels. Inoculation of Pseudomonas resulted in decrease in this property compare to non-inoculated treatments. Therefore, the use of growth promoting bacteria in soil with environmental stresses can be effective in reducing the effects of stress and in better plant growth, plant health (lower concentration of heavy metal), and also in improving ecosystem status.

Keywords

Main Subjects

References

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Journal of Sol Biology
Volume 8, Issue 2
October 2020
Pages 209-221

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