Effect of Ultrasound Waves and Plant Growth Promoting Rhizobacteria on Germination and Growth of Wheat (Triticum aestivum L.)

Document Type : Research Paper

Authors

1 MSc. Student in Agronomy, Shahrood University of Technology

2 MSc. Student in Ecology, Shahrood University of Technology

3 Associate Professor, Shahrood University of Technology

4 Assistant professor of soil and water research institute

10.22092/sbj.2014.128412

Abstract

The ultrasound waves as a novel technology can be used in agriculture science. The aim of this pot experiment was to evaluate the effects of ultrasound waves and plant growth promoting rhizobacteria on germination and growth of wheat (Triticum asativum L.). The treatments were arranged as factorial based on randomized complete block design at Shahrood University of Technology in 2011. The treatments consisted of ultrasound waves at five levels of exposure [zero (control), 2, 4, 6 and 8 minute ] and three levels of bacterial inoculation [non-inoculation (control), Azotobacter chroococum and Pseudomonas fluorescens]. The results showed a significant (p <0.01) effect of ultrasound waves on maximum germination (Gmax), germination uniformity (GU), germination rate (R50), time to 10% (D10), 50% (D50), 90% (D90) and 95% (D95) germination; PGPR inoculation affected significantly only Gmax, R50, D10 and D50. Simultaneous exposure to waves and inoculation increased Gmaxand R50 but decreased D10, D50, D90 and D95. The interactive effects of ultrasound waves and bacterial inoculation affected significantly the Gmax and R50 values. Ultrasound waves increased Gmax and R50 values significantly as compared to non-ultrasound plants at all level of inoculation . Although ultrasound waves effect was significant (P<0.01) for biomass and root weight, inoculation with PGPR significantly raised plant height . The latter was promoted by increase in ultrasound waves in all of the bacterial inoculation.
 

Keywords

References

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Journal of Sol Biology
Volume 1, Issue 2
February 2014
Pages 123-132

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