Advances in Biotechnology


Plant Growth-Promoting Bacteria: Mechanisms and Applications


Department of Biology, University of Waterloo, 200 University Avenue South, Waterloo, ON, N2L 3G1, Canada

Received 29 July 2012; Accepted 13 September 2012

Academic Editors: T. Ano, G. Comi, and M. Shoda

Copyright © 2012 Bernard R. Glick. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.


The worldwide increases in both environmental damage and human population pressure have the unfortunate consequence that global food production may soon become insufficient to feed all of the world's people. It is therefore essential that agricultural productivity be significantly increased within the next few decades. To this end, agricultural practice is moving toward a more sustainable and environmentally friendly approach. This includes both the increasing use of transgenic plants and plant growth-promoting bacteria as a part of mainstream agricultural practice. Here, a number of the mechanisms utilized by plant growth-promoting bacteria are discussed and considered. It is envisioned that in the not too distant future, plant growth-promoting bacteria (PGPB) will begin to replace the use of chemicals in agriculture, horticulture, silviculture, and environmental cleanup strategies. While there may not be one simple strategy that can effectively promote the growth of all plants under all conditions, some of the strategies that are discussed already show great promise.

PGPB: Biodiversity and Multifunctional Attributes for Sustainable Agriculture