Plant Growth Promoting Bacteria

Plant Growth Promoting Bacteria


Great review article about plant growth promoting bacteria. The link, citation, and author are below. The author believes, as I do, that in the not to distant future, plant growth promoting bacteria, PGPB, will begin to replace chemicals used in agriculture, horticulture,

plant growth promoting bacteria

Plant Growth Promoting Bacteria

environmental cleanup strategies, and even in home gardening. This change will not be a one size fits all solution, and no doubt some new technologies and application strategies will need to be employed.

Some of the key points:

  • In healthy soils, there are 108 to 10bacteria per gram but in stressed soils this number greatly decreases to as low as 104 bacteria per gram.
  • A number of different bacterial species are currently used in agriculture; however plant growth promoting bacteria are only used on a small fraction of available crops.
  • Bacteria are used for:
    • Nitrogen fixation
    • Phosphate Solubilization
    • Sequestering Iron
    • Producing Phytohormones
    • Producing Gibberellins,  Cytokinins,  Indoleacetic Acid, and Etylene
  • Bacteria affect plants in indirect ways like through competitive exclusion, and modulating the effects of stress.

The conclusion of the article is that the use of bacteria in agriculture has come of age. Taking advantage of microbe-plant interactions will be the future of agriculture. Additional studies will be needed, however, the commercial use of plant growth promoting bacteria will be more prevalent in the coming years.



Volume 2012 (2012), Article ID 963401, 15 pages
Review Article

Plant Growth-Promoting Bacteria: Mechanisms and Applications

Bernard R. Glick


Custom Biologicals, Inc.  manufactures a number of microbial products with plant growth promoting bacteria (PBPG). These biofertilizers contain both beneficial soil bacteria and beneficial Trichoderma fungi. Distributor inquires, both domestic and international are always welcome. Private formulations and protected areas are available. Contact Custom at (561) 797-3008 or via email at


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