IJAIR NAAS Score : 3.99 ,ISSN : 2319-1473
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Phenotypic and Genotypic Characterization of Phosphate Solubilizing Bacteria and Their Efficiency on the Growth of Maize (Zea mays)
- Amit Pande; Prashant Pandey; Simmi Mehra; Mritunjay Singh; Suresh Kaushik
- Phosphate solubilizing bacteria (PSB) has ability to convert insoluble form of phosphorous to an available form. Applications of PSB as inoculants increase the phosphorus uptake by plant in the agriculture field. In this study, isolation and identification of PSB were carried out in Indian agriculture field (Nainital region, Uttarakhand). A total of 8 phosphate solublizing bacterial colonies were isolated on the Pikovskaya’s (PKV) agar medium, containing insoluble tri-calcium phosphate (TCP). The colonies showed clear halo zones around the bacterial growth were considered as phosphate solubilizers. Out of 8 bacterial isolates, 3 isolates showed high phosphate solubilization index (PSI) ranged from 4.88 ±0.69 to 4.48 ±0.30, lower pH ranging 3.08 ±0.08 to 3.82 ±0.12 and high phosphate solubilization varied from 305.49 ±10 μg/ml to 277.72 ±1.45 μg/ml, were selected for further characterization. Based on the 16S rRNA gene sequence analysis A4 isolate and H6 isolate were closely related to Alcaligenes aquatilis (99%), and C1 isolate was closely related to Burkholderia cepacia (99%). In addition, pot examination also showed the greatest efficiency in promotion of maize growth compared to uninoculated plant. Isolated PSB were able to produce different organic acids (such as gluconic acids, formic acid, and citric acid) in the culture supernatant and may consider as the principle mechanism for phosphate solubilization. This study clearly indicates that A4, C1 and H6 isolate may use as a biofertilizers in ecological agricultural systems instead of synthetic chemicals and may help to sustain environmental health and soil productivity
- Select Volume / Issue:
- Year:
- 2017
- Type of Publication:
- Article
- Keywords:
- Phosphorus; Phosphate Solubilizing Bacteria; Phosphate Solubilization Index; Tri-Calcium Phosphate; Pikovskayas
- Journal:
- IJAIR
- Volume:
- 5
- Number:
- 6
- Pages:
- 929-938
- Month:
- May
- ISSN:
- 2319-1473
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