Isolation and characterization of phosphorus solubilizing bacteria, potassium releasing bacteria and sulphur oxidizing bacteria in maize (Zea mays L.) rhizosphere soils of Andhra Pradesh

Abstract

In this study, the Phosphorus Solubilizing Bacteria (PSB), Potassium Releasing Bacteria (KRB) and Sulphur Oxidizing Bacteria (SOB) strains were acquired from maize rhizosphere soils from Guntur, Kurnool and Viziangaram districs of Andhra Pradesh state. Those isolates were identified on different medias like, Pikovskaya’s agar, Aleksandrow’s agar and Thiosulphate agar medias followed by PSB, KRB and SOB isolates respectively. Those isolates were studied by their gram reaction, cultural, morphological, biochemical and PGPR characteristics.