Plant growth promotion of barley (Hordeum vulgare L.) by potassium solubilizing bacteria with multifarious plant growth promoting attributes

Authors

DOI:

https://doi.org/10.14719/pst.1377

Keywords:

biodiversity, sustainable agriculture, bio-inoculant

Abstract

Potassium (K) is the foremost macronutrients for growth of plant, soil health and fertility. The huge application of NPK chemical fertilizers negatively impacts the economy and is a threat to environmental sustainability. The rapid depletion of K mineral in soil is due to the application of agrochemicals agricultural fields for the production of crops in India. In present investigation, K-solubilizing microbes (KSM) were isolated and enumerated from cereal crops growing in Sirmour Himachal Pradesh. A total 125 bacteria were isolated and screened for K- solubilization on Aleksandrov agar plates and found that 31 bacterial strains exhibited K-solubilization. These 31 K-solubilizing strains of bacteria were additionally screened for other plant growth promoting (PGP) potential including solubilization of minerals, production of siderophores, ammonia, hydrogen cyanide and indole acetic acids. The performance of an efficient K-solubilizer was evaluated for plant growth promoting ability in pot assay under in vitro conditions. The strain EU-LWNA-25 positively influenced shoot length, fresh weight, carotenoids and total sugar content than the full dose, half dose and control. The strain enhancing physiological and growth parameters was identified by BLASTn analysis as Pseudomonas gessardii EU-LWNA-25. K-solubilizing plant growth promoting bacteria could be suitable bioinoculants for Rabi seasonal crops and overcomes the challenges of sustainable agriculture in K-deficient soil.

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Author Biography

Ajar Nath Yadav, Microbial Biotechnology Lab, Department of Biotechnology, Dr. KS Gill Akal College of Agriculture, Eternal University, Himachal Pradesh, India

Ajar Nath Yadav is an Associate Professor and Assistant Controller of Examinations at Eternal University, Baru Sahib, Himachal Pradesh, India. He has 8 years of teaching and 12 years of research experiences in the field of microbial biotechnology, microbial diversity and plant-microbe-interactions. He obtained his doctorate degree in Science (Microbial Biotechnology) in 2016, jointly from Indian Agricultural Research Institute, New Delhi and Birla Institute of Technology, Mesra, Ranchi, India; M.Sc. (Biotechnology), in 2009 from Bundelkhand University and B.Sc. (BCZ) in 2006 from University of Allahabad, India. Dr. Yadav has 158 publications with h-index 56, i10-index 154, and 8412 citations (Google Scholar –on 06/06/2021). Dr. Yadav published 112 research communications. Dr. Yadav has got 12 Best Paper Presentation Awards, and one Young Scientist Award (NASI-Swarna Jayanti Purskar). Dr. Yadav received the “Outstanding Teacher Award” in the 6th Annual Convocation 2018 by Eternal University, Baru Sahib, Himachal Pradesh. Dr. Yadav has a long-standing interest in teaching at the UG, PG, and Ph.D. level and is involved in taking courses in agriculture microbiology, bacteriology, biosystematics and biodiversity, bioprocess engineering and technology, environmental biotechnology, environmental microbiology, industrial microbiology, microbial biotechnology and techniques in microbiology and biotechnology. Dr. Yadav is currently handling two projects one funded by Department of Environments, Science & Technology (DEST), Shimla and one by HP Council for Science, Technology & Environment (HIMCOSTE). Presently he is guiding 05 scholars for PhD degree and 01 for M.Sc. dissertations. In his credit ~6700 microbes (Archaea, bacteria and fungi) isolated from diverse sources and ~550 potential and efficient microbes deposited at culture collection National Bureau of Agriculturally Important Microorganisms (NBAIM), Mau, India. He has deposited 2386 nucleotide sequences and 03 whole genome sequences (Bacillus thuringiensis AKS47, Arthrobacter agilis L77 and Halolamina pelagica CDK2) and 02 transcriptome to NCBI GenBank databases: in public domain. The niche-specific microbes from extreme environments were reported as specific bio-inoculants (Biofertilizers) for crops growing in normal and diverse abiotic stress conditions. Dr. Yadav and group have developed technology for screening of archaea for phosphorus solubilization for the first time. He is Editor/associate editor/reviewer of different international and national journals. He has the lifetime membership of Association of microbiologist in India, Indian Science Congress Council, India and National Academy of Sciences, India.

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Published

31-12-2021

How to Cite

1.
Kaur T, Devi R, Kour D, Yadav A, Yadav AN. Plant growth promotion of barley (Hordeum vulgare L.) by potassium solubilizing bacteria with multifarious plant growth promoting attributes. Plant Sci. Today [Internet]. 2021 Dec. 31 [cited 2024 Nov. 21];8(sp1):17-24. Available from: https://horizonepublishing.com/journals/index.php/PST/article/view/1377

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Section

Special Issue: Soil and Phytomicrobiomes for Plant Growth and Soil Fertility

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