Abstract
The use of plant growth promoting microbes (PGP) microbes in agriculture has increased due to negative impact of the chemical fertilizers. PGP microbes enhance the plant growth and productivity by diverse mechanisms such as the biological nitrogen fixation; solubilization of phosphorus, potassium and zinc; production of siderophores, plant growth regulators, hydrolytic enzymes, and various phytohormones. PGP microbes as bio-inoculants have been used as sources to improve plant nutrients in sustainable agriculture. The present study was designed to investigate the impact of single as well as the co-inoculation of a nitrogen fixer (Acinetobacter guillouiae EU-B2RT.R1) and a potassium solubilizer (Acinetobacter calcoaceticus EU- LRNA-72) in combination with chemical fertilizers for growth promotion of onion. Each strain used as bio-inoculants positively impacted shoot length, root length, biomass, phenolic, flavanoids, total soluble sugars and chlorophyll content of onion. Thus, nitrogen fixing and potassium solubilizing bacteria could be a promising and potential alternative for utilizing as source of fertilizers to horticultural system and to maintain greater nutrients availability in soil for agricultural sustainability.
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Abbreviations
- PGP Microbes:
-
Plant growth promoting microbes
- PGPR:
-
Plant growth promoting rhizobacteria
- VAM:
-
Vesicular Arbuscular Mycorrhiza
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Acknowledgements
The authors are grateful to the Department of Environment, Science & Technology (DEST), Shimla funded project “Development of Microbial Consortium as Bio-inoculants for Drought and Low Temperature Growing Crops for Organic Farming in Himachal Pradesh” for providing the facilities and financial support, to undertake the investigations.
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Kour, D., Kaur, T., Devi, R. et al. Co-inoculation of nitrogen fixing and potassium solubilizing Acinetobacter sp. for growth promotion of onion (Allium cepa). Biologia 78, 2635–2641 (2023). https://doi.org/10.1007/s11756-023-01412-8
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DOI: https://doi.org/10.1007/s11756-023-01412-8