Isolation and Characterization of Plant Growth Promoting Rhizobacteria Associated with Saccharum officinarum L.

Abstract

Plant growth promoting rhizobacteria is free living soil microorganisms that directly or indirectly exert beneficial effects on plants. Hundred strains were characterized morphologically and biochemically. Primary screening was carried out for all hundred isolates for IAA, phosphate solubilization, siderophore and nitrogen fixation. Eight isolates F181, F271, F323, F372, F373, F531, ELB1 and ESB4 from different sites and sugarcane cultivars have showed potential for all PGPR activities and were further investigated quantitatively. The isolates could exhibit more than two or three PGP traits, which may promote plant growth directly or indirectly or synergistically. The results shown, F372 achieved the highest phosphate solubilization of 15 mg L -1, and F271 was the most promising IAA producer with 63 mg L -1. Furthermore, most of the PGPR isolates shown antifungal properties like HCN chitinase and protease production. The present study, therefore, suggests that the use of selected PGPR isolates as inoculants might be beneficial for sugarcane cultivation.

Molecular identification and biocontrol activity of sugarcane rhizosphere bacteria against red rot pathogen Colletotrichum falcatum

“…Although many studies on the PGP activities of the sugarcane rhizobacteria have been reported till date, only a few of them have reported both PGP and biocontrol. In recent years, different rhizobacteria including members of the genus Acinetobacter and Klebsiella have been reported from the sugarcane to possess PGP properties [16,[30], [31], [32]].…”

Potential Novel Plant Growth Promoting Rhizobacteria for Bio-Organic Fertilizer Production in the Oil Palm (Elaeis guineensis Jacq.) in Malaysia

“…Vessey [41] found phosphate-solubilizing rhizobacteria to be one of the finest alternatives to inorganic phosphate fertilizers for improving plant productivity and development since phosphorus has been identified as one of the most critical nutrients for plant growth [69]. According to Modi and Patel [70], the best isolates Bacillus sp., Pantoea sp., Klebsiella sp., Stenotrophomonas sp. and Burkholderia sp.…”

“…Vessey [41] found phosphate-solubilizing rhizobacteria to be one of the finest alternatives to inorganic phosphate fertilizers for improving plant productivity and development since phosphorus has been identified as one of the most critical nutrients for plant growth [69]. According to Modi and Patel [70], the best isolates as phosphate solubilizers were F372 (15 mg/L), which was associated with Saccharum officinarum, followed by ESB4 (14 mg/L). Bhardwaj et al [71] obtained similar consistent phosphate solubilization findings in both agar and broth assays.…”

Characterization of Some Plant Growth-Promoting Rhizobacteria Isolated From Sugar Beet Rhizosphere

“…In the same way, microorganisms capable of producing a clear zone due to Phosphate solubilization in the surrounding Pikovskaya medium were selected as potential phosphate solubilizers [41]. Moreover, the results of [42] stated the ability of eight out of 61 rhizobacterial isolates to solubilize phosphate.…”