Molecular characterization and screening of phosphate solubilising bacteria in acidic soils / (Record no. 4093)
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| 000 -LEADER | |
|---|---|
| fixed length control field | 03820nam a22002177a 4500 |
| 003 - CONTROL NUMBER IDENTIFIER | |
| control field | OSt |
| 005 - DATE AND TIME OF LATEST TRANSACTION | |
| control field | 20241202154226.0 |
| 008 - FIXED-LENGTH DATA ELEMENTS--GENERAL INFORMATION | |
| fixed length control field | 130822b xxu||||| |||| 00| 0 eng d |
| 040 ## - CATALOGING SOURCE | |
| Transcribing agency | CPGS |
| 082 ## - DEWEY DECIMAL CLASSIFICATION NUMBER | |
| Classification number | 631.42 |
| 100 ## - MAIN ENTRY--PERSONAL NAME | |
| Personal name | Yumnam Bijilaxmi Devi |
| 9 (RLIN) | 1187 |
| 245 ## - TITLE STATEMENT | |
| Title | Molecular characterization and screening of phosphate solubilising bacteria in acidic soils / |
| Statement of responsibility, etc | by Yumnam Bijilaxmi Devi |
| 260 ## - PUBLICATION, DISTRIBUTION, ETC. (IMPRINT) | |
| Place of publication, distribution, etc | Umiam : |
| Name of publisher, distributor, etc | CPGS, CAU |
| Date of publication, distribution, etc | c2012 |
| 300 ## - PHYSICAL DESCRIPTION | |
| Extent | [32], 95p.: |
| Other physical details | ill.some col.; |
| 440 ## - SERIES STATEMENT/ADDED ENTRY--TITLE | |
| Title | [Soil Science and Agricultural Chemistry, School of Natural Resource Management] |
| 9 (RLIN) | 1188 |
| 520 ## - SUMMARY, ETC. | |
| Summary, etc | Phosphorus (P) limitation in terrestrial ecosystems may be widespread. More than 81% soils of 26.22 million hectare in North East India are acidic and P deficient, which more often limits the crop productivity. A large portion (50-92%) of water soluble fractions of applied P losses either by runoff water or gets fixed as Fe and Al complexes in these soils. So, rhizosphere-based P management may be an effective approach to improve P-use efficiency and crop yield through exploitation of biological potential for efficient mobilization and acquisition of P by crops, and reducing the overreliance on application of chemical fertilizer P. With this background this present study assessed whether the incidence of phosphorus-solubilising bacteria (PSB) and their ability to solubilise insoluble phosphates vary among diverse rice fields of the northeastern hill states of India. Further PSB isolates were screened for multifaceted plant growth promoting traits and their ability to stimulate yield and P-uptake of rice (var. Shahsarang). Altogether 173 PSB isolates were obtained in Ca3(PO4)2 amended Pikovskaya’s agar and the ability of these isolates to dissolve Ca3(PO4)2 ranged from 0.2 to 1.2 µg Pi ml-1 h-1. Out of 173 isolates, 43.28% and 12.5% isolates dissolved Na-phytate (ranged from 0.1 to 0.68 g Pi ml-1 h-1) and FePO4 (ranged from 0.05 to 0.2 (g Pi ml-1 h-1), respectively. Among 60 selected PSB isolates, 40%, 83.3%, 100% and 68.3% isolates were positive for production of IAA like substances (0.52 to 17.4 g ml-1 h-1), N2-fixation in nitrogen free bromothymol broth, phosphatase activity (0.16 to 3.24 g PNP ml-1 h-1) in Na-phytate amended minimal broth and cellulase activity in terms of zone of solubilisation on carboxy-methyl -cellulose agar (1.0 to 16.0 mm), respectively. In anacidic inceptisols application of PSB isolates and rock phosphate (@ 30 kg P ha-1) stimulated rice grain yield and P-uptake in grain to the extent at par with that of application of single super phosphate (@ 60 kg P ha-1). The PSB isolates showed higher ability to solubilise FePO4 and Na-phytate stimulated rice grain yield and P-uptake to a greater extent. The 16S rRNA gene sequence based identity of 21 selected PSB isolates revealed that PSB isolates belonged to genera Enterobacter, Pseudomonas, Klebsiella, Cedecea, Arthrobacter, Burkholderia, Serratia, Bacillus, Chromobacterium and Ralstonia,. The most abundant genus was Enterobacter. In conclusion, acidic soils of North East India harbour potential phosphate solubilising bacteria and these bacteria possess multiple plant growth promoting traits. In this study, at least PSB isolates MZS4-017, ARS1-002 and RBS1-006 were found to be superior strains in terms of stimulating rice growth, yield and P-uptake. These strains are potential candidates for inclusion in integrated nutrient management, organic farming and compost enrichment programmes for improving P-use efficiency after validation through multi- locational field trials. |
| 650 ## - SUBJECT ADDED ENTRY--TOPICAL TERM | |
| Topical term or geographic name as entry element | Molecular characterization-Acidic soils |
| 9 (RLIN) | 1189 |
| 650 ## - SUBJECT ADDED ENTRY--TOPICAL TERM | |
| Topical term or geographic name as entry element | Phosphate solubilising bacteria-Acidic soils |
| 9 (RLIN) | 1190 |
| 700 ## - ADDED ENTRY--PERSONAL NAME | |
| Personal name | Dwipendra Thakuria |
| Relator term | Major Advisor |
| 9 (RLIN) | 1191 |
| 942 ## - ADDED ENTRY ELEMENTS (KOHA) | |
| Source of classification or shelving scheme | Dewey Decimal Classification |
| Koha item type | MSc Thesis |
| Withdrawn status | Lost status | Source of classification or shelving scheme | Damaged status | Not for loan | Collection code | Home library | Current library | Date acquired | Total Checkouts | Full call number | Barcode | Date last seen | Price effective from | Koha item type |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Dewey Decimal Classification | Natural Resource Management | CPGS | CPGS | 30/10/2012 | 631.42 YUM | TH093 | 24/01/2020 | 22/08/2013 | MSc Thesis |