Article

The Journal of Microbiology

, Volume 47, Issue 2, pp 167-171

First online:

Burkholderia sp. KCTC 11096BP as a newly isolated gibberellin producing bacterium

  • Gil-Jae JooAffiliated withInstitute of Agricultural Science and Technology, Kyungpook National University
  • , Sang-Mo KangAffiliated withSchool of Applied Biosciences, College of Agriculture and Life Sciences, Kyungpook National University
  • , Muhammad HamayunAffiliated withSchool of Applied Biosciences, College of Agriculture and Life Sciences, Kyungpook National University
  • , Sang-Kuk KimAffiliated withDivision of Crop Science, Gyongbuk Provincial Agricultural Technology Administration
  • , Chae-In NaAffiliated withSchool of Applied Biosciences, College of Agriculture and Life Sciences, Kyungpook National University
  • , Dong-Hyun ShinAffiliated withSchool of Applied Biosciences, College of Agriculture and Life Sciences, Kyungpook National University
  • , In-Jung LeeAffiliated withSchool of Applied Biosciences, College of Agriculture and Life Sciences, Kyungpook National University Email author 

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Abstract

We isolated 864 bacteria from 553 soil samples and bioassayed them on cucumber and crown daisy for plant growth promotion. A new bacterial strain, Burkholderia sp. KCTC 11096BP gave maximum growth promotion and was selected for further investigations. The culture filtrate of this bacterium was thus analyzed for the presence of gibberellins and we found physiologically active gibberellins were found (GA1, 0.23 ng/100 ml; GA3, 5.11 ng/100 ml and GA4, 2.65 ng/100 ml) along with physiologically inactive GA9, GA12, GA15, GA20, and GA24. The bacterial isolate also solubilised tricalcium phosphate and lowered the pH of the medium during the process. The isolate was identified as a new strain of Burkholderia through phylogenetic analysis of 16S rDNA sequence. Gibberellin production capacity of genus Burkholderia is reported for the first time in current study.

Keywords

Burkholderia gibberellins phosphate solubilization plant growth phylogenetic analysis