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Klebsiella have been utilised to inoculate a wide span of agricultural land with the goal of

augmenting plant productivity (Steele et al., 1983).

Table 1.2 Mechanisms Of Action For Plant Growth Promotion by PGPR

PGPR PGPR mechanism Crops References
Azotobacter N2 fixation Wheat, barley, oats, ( Wani et al., 2013)

rice, tobacco,

sunflower, maize,

coffee and coconuts
Bacillus Auxin synthesis Potato (Ahmed et al., 2010)

Bacillus Cytokinin synthesis Cucumber (Han et al., 2006; Joo

Gibberelin synthesis K et al., 2005; Sokolova
Pepper
solubilization et al.,

plant stress Pepper, cucumber 2011)

resistance Peanuts, maize

Bacillus Antibiotic Alfalfa (Silo-Suh et al.,

production 1994)

Burkholderia N2 fixation Rice (Govindarajan et al.,

2008; Kao et al.,

2003)

Burkholderia Improved plant Sweet leaf (Istina et al., 2015;

gladioli growth Rahi et al., 2010)

Auxin synthesis Oil palm

P solubilization
GluconoacetobactN2 fixation Sugarcane (Muñoz-Rojas et al.,

o

2003)

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