Screening of Groundnut Plant Associated Rhizobacteria for Multiple Plant Beneficial Plant Growth Promoting Traits

Abstract

Screening for plant growth-promoting attributes Phosphate solubilization: Actively dividing test isolates was screened to solubilize phosphate by employing Pikovskaya's (PVK) agar medium [21] without and with bromophenol blue dye (0.01-0.001 mg/l) [22]. Qualitative phosphate solubilizing efficiency (% SE) was calculated using the following formula [23]: Solubilizing efficiency (% SE)=Z-C/C × 100 Z=Total solubilization diameter (cm) C=Colony diameter (cm) Auxin hormone production: Isolates were screened for their qualitative and quantitative ability to produce the auxin hormone by adopting the method of Loper and Scroth, [24]. All isolates was grown