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Biotechnology Letters

, Volume 31, Issue 2, pp 277–281 | Cite as

Gibberellin production and phosphate solubilization by newly isolated strain of Acinetobacter calcoaceticus and its effect on plant growth

  • Sang-Mo Kang
  • Gil-Jae Joo
  • Muhammad Hamayun
  • Chae-In Na
  • Dong-Hyun Shin
  • Hak Youn Kim
  • Jin-Kyu Hong
  • In-Jung Lee
Original Research Paper

Abstract

Plant growth-promoting rhizobacteria with gibberellins (GA)-producing potential were isolated from soil and screened for plant growth promotion. A new strain, Acinetobacter calcoaceticus SE370, produced extracellular GA and also had phosphate solubilising potential. It produced 10 different gibberellins, including the bioactive GA1, GA3 and GA4 which were at, respectively, 0.45, 6.2 and 2.8 ng/100 ml. The isolate solubilised tricalcium phosphate and lowered pH of the medium during the process. Culture filtrates of the organism after growth on broth promoted growth of cucumber, Chinese cabbage and crown daisy.

Keywords

Acinetobactercalcoaceticus Gibberellin production Phosphate-solubilization Plant growth promotion 

Notes

Acknowledgments

This research project was supported by the Korea Research Foundation Grant (KRF-2004-005-F00062).

Supplementary material

10529_2008_9867_MOESM1_ESM.doc (26 kb)
MOESM1 (DOC 27 kb)

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Copyright information

© Springer Science+Business Media B.V. 2008

Authors and Affiliations

  • Sang-Mo Kang
    • 1
  • Gil-Jae Joo
    • 2
  • Muhammad Hamayun
    • 1
  • Chae-In Na
    • 1
  • Dong-Hyun Shin
    • 1
  • Hak Youn Kim
    • 3
  • Jin-Kyu Hong
    • 4
  • In-Jung Lee
    • 1
  1. 1.Division of Plant Biosciences, College of Agriculture and Life SciencesKyungpook National UniversityDaeguSouth Korea
  2. 2.Institute of Agricultural Science and TechnologyKyungpook National UniversityDaeguSouth Korea
  3. 3.Department of Environmental Conservation and Disaster Prevention, College of EnvironmentKeimyung UniversityDaeguSouth Korea
  4. 4.Hankook EM Industry Co., LtdDaeguSouth Korea

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