Secondary Metabolites of Pseudomonas aurantiaca and Their Role in Plant Growth Promotion



Most of the fluorescent pseudomonads isolated from plant rhizosphere promote plant growth by direct and indirect mechanisms. These bacteria produce phytohormones and promote plant growth directly. In addition, they produce secondary metabolites which inhibit the growth of pathogenic bacteria and fungi and promote plant growth indirectly. Among fluorescent pseudomonads, Pseudomonas aurantiaca, a subspecies of Pseudomonas chlororaphis, is known to produce antibiotics with antifungal activity. Strains of P. aurantiaca have been isolated from sugarcane, soya bean, canola, soil, and municipal sludge in different parts of the world including North America, Europe, and Asia. These strains are reported to produce IAA, HCN, siderophores, phenazines, cyclic lipopeptides, pyoverdin, and quorum-sensing signaling compounds. Most of these strains have shown antifungal activity against several pathogenic strains of Fusarium, Pythium, Colletotrichum, Rhizoctonia, and Sclerotium sp. One of these P. aurantiaca strain SR1 has been proven as a plant growth promoter for several crops. In this manuscript, a review of all reported strains of P. aurantiaca and their growth-promoting abilities is presented. The main focus is on secondary metabolites and mechanism used by these metabolites to promote plant growth, with a suggestion that this bacteria can be used as a biofertilizer and a biocontrol agent in the near future.


High Performance Liquid Chromatography Secondary Metabolite Antifungal Activity Quorum Sense Plant Growth Promotion 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.



Author is grateful to Dr. Rahman Shah Zaib Saleem (Department of Chemistry, School of Science and Engineering (SSE), Lahore University of Management Sciences (LUMS), Lahore, Pakistan) for the drawing of structures of secondary metabolites presented in Fig. 14.2.


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© Springer India 2013

Authors and Affiliations

  1. 1.Department of Biological SciencesForman Christian College UniversityLahorePakistan

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