Impact of plant growth-promoting rhizobacteria on yield and disease control of Nicotiana tabacum


  • Sohail Khan Department of Microbiology, Hazara University, Mansehra
  • Fazli Subhan Department of Microbiology, Hazara University, Mansehra
  • Kashif S. Haleem Department of Microbiology, Hazara University, Mansehra
  • Muhammad N. Khan Khattak Department of Applied Biology, University of Sharjah
  • Ibrar Khan Department of Microbiology, AUST, Abbottabad
  • Tariq Sultan Land Resource Research Institute, NARC, Islamabad
  • Isfahan Tauseef Department of Microbiology, Hazara University, Mansehra


rhizobacteria, soil, tobacco, phytopathogens, plant protection


Paper description:

  • The manuscript demonstrates the first isolation and characterization of PGPR associated with the Nicotiana tabacum root soil system from an unexplored and isolated area of Pakistan.
  • The findings demonstrate that the indigenous microbial community of this region possess a strong potential to enhance the growth and yield of tobacco crop through enhancement of nutrients uptake and antifungal activity.
  • These finding have a significant and sustainable impact in terms of reduction of application of chemical fertilizers/fungicides and enhancement of growth and yield of crop.

Abstract: An unexplored soil microbial community associated with the root system of Nicotiana tabacum was isolated to analyze its impact on growth and yield of the crop. A total of nine isolates out of 180 were biochemically screened and characterized as potential plant growth-promoting rhizobacteria due to the expression of growth-promoting traits. All isolates were positive for ammonia production, 8 were positive for phosphate solubilization but none for auxin production. The majority of the isolates were also found positive for hydrogen cyanide, siderophore and hydrolytic/degradative enzymes production, enabling them to restrict the growth of Fusarium oxysporum in an in vitro assay. Although all tested isolates enhanced tobacco growth significantly, Baj-ER-01 and CD-RS-03 were found to be the most promising in enhancing all aspects of growth. This study provides evidence for the enhancement of growth and yield of inoculated tobacco plants through an adequate supply of nutrients and/or controlling phytopathogens.

Received: March 15, 2018; Revised: July 22, 2018; Accepted: July 26, 2018; Published online: August 9, 2018

How to cite this article: Khan S, Subhan F, Haleem KS, Khattak MNK, Khan I, Sultan T, Tauseef I. Impact of plant growth-promoting rhizobacteria on yield and disease control of Nicotiana tabacum. Arch Biol Sci. 2018;70(4):717-25.


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How to Cite

Khan S, Subhan F, Haleem KS, Khan Khattak MN, Khan I, Sultan T, Tauseef I. Impact of plant growth-promoting rhizobacteria on yield and disease control of Nicotiana tabacum. Arch Biol Sci [Internet]. 2018Dec.4 [cited 2023Nov.28];70(4):717-25. Available from: