Effect of Chemical Fertilizer-adaptive Variants, Pseudomonas aeruginosa GRC₂and Azotobacter chroococcum AC₁, on Macrophomina phaseolina Causing Charcoal Rot of Brassica juncea

Rhizosphere competent Pseudomonas aeruginosa in the management of Heterodera cajani on sesame

“…However, their utilization efficiency remains low due to loss by volatization, denitrification, leaching and conversion into unavailable forms. Continuous use of chemical fertilizers subverts the soil ecology, disrupt environment, degrade soil fertility and consequently show harmful effects on human health (Ayala and Rao 2002;Joshi et al 2006). Therefore, effectiveness of potential biocontrol agents were also assessed at reduced dose of fertilizers in field trials.…”

Enhancing micronutrient uptake and yield of wheat through bacterial PGPR consortia

“…In intensive cropping systems, supplementing soil nutrients by use of chemical fertilizers is considered inevitable for obtaining optimum yield of crops; however, their utilization efficiency remains low, due to losses through volatilization, denitrification, leaching and conversion into unavailable forms (Sturz et al 2000). Intensive use of chemical fertilizers subverts the soil ecology, disrupts the environmental balance, degrades soil fertility, contaminates ground water and consequently leads to harmful effects on human health (Ayala and Rao 2002;Joshi et al 2006). Therefore, supplementation with biofertilizers can be a suitable and environmentally friendly alternative for enhancing crop yields, to sustain the inherent fertility of soils.…”

Growth enhancement ofSesamum indicumL. by rhizosphere-competentAzotobacter chroococcumAZO2 and its antagonistic activity againstMacrophomina phaseolina

“…These are Gram negative, motile, cyst former rods with acuminated ends. There are many known factors that contribute to the PGP activities of Azotobacter such as N 2 fixation, IAA production, phosphate solubilisation (Kumar and Narula 1999), siderophore production (Fekete et al 1989;Verma et al 2001), ACC deaminase activity, antagonism towards various plant pathogens (Joshi et al 2006) and lytic enzymes (Gupta et al 1999;Singh et al 2008). A bacterium can affect plant growth by one or more of these mechanisms and uses different abilities for growth promotion at various times during the life cycle of plants.…”

“…Many microorganisms have evolved high-affinity iron-acquisition systems. Components of a high-affinity system include the synthesis and release of siderophores into the extracellular environment to chelate and solubilise Fe þ3 and the synthesis and deployment of specific cytoplasmic membrane receptor proteins (Fekete et al 1989;Joshi et al 2006).…”