Effects of plant growth promoting rhizobacteria (PGPRs) applying on yield and yield components of Almute wheat under drought stress condition

Document Type : Original Article

Author

Graduate Student, Faculty of Agriculture and Natural Resources, University of the Persian Gulf, Bushehr, Iran

Abstract

This study was carried out to investigate the effect of application of growth stimulating bacteria on yield and yield components of wheat, Alamut cultivar under drought stress conditions in a research farm of Razi University of Kermanshah in the period of 2018-2017. Experimental design of this research was factorial based on randomized complete blocks design with four replications. First factor included of Irrigation at three levels (based on 80, 120 and 160 mm evaporation from class A evaporation pan) and second factor included of growth promoting bacteria in four levels (PGU19, PGU18, PGU17, PGU16) with a control (no bacteria). 20 isolates were studied in terms of the important characteristics of plant growth promoter and drought tolerance in laboratory conditions. Four strains which were superior to others based on growth-promoting properties and drought tolerance were selected. At planting time, seeds were inoculated with suspension of selected Pseudomonas strains (108 CFU/ml). The results of variance analysis showed that the main effects of all factors on the studied traits were significant and the interaction effects of bacteria and irrigation were significant on plant height, number of spikes and number of seeds per spike. With increasing drought stress, yield and yield components decreased. Different bacterial isolates increased all traits compared to control at all levels of stress, but after 80 mm evaporation from class A, bacterial application had no significant effect on mentioned traits.

Keywords

References

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