Plant growth promoting rhizobacteria (PGPR): A promising approach for plant disease management
2020
Shahnaz, Efath | Surma, Sana | Banday, Saba | Bhat, Z. A. | Muzaffar, Misbah
Plant growth promoting rhizobacteria (PGPR) are emerging as an important component of biological control of plant diseases. They affect the plant growth both directly, by promotion of growth and indirectly, by preventing or lessening the deleterious effects of phytopathogens. Research on PGPR over the last three decades has unraveled their efficacy in improving plant growth by increasing seed emergence, plant height and weight and ultimately crop yield. Simultaneously, these organisms have shown great antagonistic activity against several soil borne pathogens of economically important crops. PGPR as bio-control agents have certain advantages over conventional chemical control method as PGPR are non-toxic, naturally occurring and their application is sustainable. Another advantage of PGPR is that they possess a diverse range of modes of action including antibiosis, cell wall degrading enzymes, bio-surfactants, volatiles and also induces systemic resistance in plants. The efficiency of PGPR as biocontrol agent or microbial inoculants (biofertilizers) depends on the method of inoculation/application, physiological state, concentration, dosage, presence or absence of nutrients or adjuvants such as adhering or protective agents.
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