PGPR Isolates from the Rhizosphere of Vegetable Crop Momordica charantia: Characterization and Application as Biofertilizer
Plant Growth Promoting Rhizobacteria (PGPR) are a group of naturally occurring soil bacteria that aggressively colonize plant roots and increase plant growth and yield (Wu et al. 2005) They prevent the colonization of deleterious rhizospheric microorganisms (DRMOs) at micro niches and can promote plant growth directly or indirectly. It is interesting to study the diverse bacterial taxa for their PGPR characteristics (Lucy et al. 2004) The numbers of PGPR species has increased due to studies on a wide range of plant species, advancement in bacterial taxonomy and progress in understanding the different mechanisms of action of PGPR. The increased number of PGPR for various crops and vegetables has been commercialize as a biofertilizer, recently includes Pseudomonas (Loper et al. 2007) Azospirillum (Cassan and Garcia Salamone, 2008) Bacillus (Jacobson et al. 2004) Stenotrophomonas (Ryan et al. 2009) Rhizobium (Long, 2001) Serratia (De Vleeschauwer and Hofte, 2007) Azotobacter, Klebsiella, Enterobacter, Alcaligens, Arthrobacter, Burkholderia (Joseph et al. 2007) and Streptomyces (Schrey and Tarkka. International Journal of Current Microbiology and Applied Sciences ISSN: 2319 7706 Volume 6 Number 3 (2017) pp. 1789 1802 Journal homepage: http:/www.ijcmas.com