Enterobacter sp. strain Fs-11 adapted to diverse ecological conditions and promoted sunflower achene yield, nutrient uptake and oil contents
- Published
- Accepted
- Subject Areas
- Agricultural Science, Microbiology
- Keywords
- Enterobacter sp., Field evaluation, Fatty acids, Transmission electron microscopy, Growth studies, Agro-climatic locations
- Copyright
- © 2018 Shahid et al.
- Licence
- This is an open access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, reproduction and adaptation in any medium and for any purpose provided that it is properly attributed. For attribution, the original author(s), title, publication source (PeerJ Preprints) and either DOI or URL of the article must be cited.
- Cite this article
- 2018. Enterobacter sp. strain Fs-11 adapted to diverse ecological conditions and promoted sunflower achene yield, nutrient uptake and oil contents. PeerJ Preprints 6:e26524v1 https://doi.org/10.7287/peerj.preprints.26524v1
Abstract
Plant growth-promoting rhizobacteria (PGPR) are under extensive investigation, especially in developing countries, as supplements of chemical fertilizers due to cost-effective and eco-friendly nature. The competence and consistency of PGPR in heterogeneous soil medium and diverse ecological settings are still unclear. The current study presents in vitro and field evaluation of a physiologically and genetically characterized PGPR strain Enterobacter sp. Fs-11 (GenBank accession # GQ179978) in terms of its potential to thrive in rhizosphere and enhance sunflower crop yield and oil contents under diverse environmental conditions. Under in vitro conditions, strain Fs-11 was found to grow optimally at a range of temperature (15 to 40 °C) and pH values (6.5 to 8.5). Extracellular and intracellular localization of the strain Fs-11 in sunflower root cortical cells through transmission electron microscopy confirmed its epiphytic and endophytic root colonization pattern, respectively. In field experiments, conducted at three different agro-climatic locations, inoculation of strain Fs-11 at 50% reduced NP-fertilizer resulted in a significant (Fisher’s LSD; P≤0.05) increase in growth, achene yield, nutrient uptake and oil contents as compared to non-inoculated plants. Inoculation also responded significantly in terms of increase in mono and polyunsaturated fatty acids (oleic and linoleic acids, respectively) without rising saturated fatty acid (palmitic and stearic acid) contents. We concluded that Enterobacter sp. Fs-11 is a potential candidate for biofertilizer formulations to supplement chemical fertilizer requirements of sunflower crop under diverse climatic conditions.
Author Comment
This is a submission to PeerJ for review.