1
|
Yadav RC, Sharma SK, Varma A, Rajawat MVS, Khan MS, Sharma PK, Malviya D, Singh UB, Rai JP, Saxena AK. Modulation in Biofertilization and Biofortification of Wheat Crop by Inoculation of Zinc-Solubilizing Rhizobacteria. FRONTIERS IN PLANT SCIENCE 2022; 13:777771. [PMID: 35283872 PMCID: PMC8914200 DOI: 10.3389/fpls.2022.777771] [Citation(s) in RCA: 8] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/15/2021] [Accepted: 01/10/2022] [Indexed: 06/01/2023]
Abstract
Zinc is an important micronutrient needed for the optimum growth and development of plants. Contrary to chemical zinc fertilizers, the use of zinc-solubilizing bacteria is an environmentally friendly option for zinc enrichment in edible parts of crops. This study was conducted with the objective of selecting potential zinc-solubilizing rhizobacteria from the rhizosphere of chickpea grown in soils of eastern Uttar Pradesh and further assessing their impact on the magnitude of zinc assimilation in wheat crops. Among 15 isolates, CRS-9, CRS-17, CRS-30, and CRS-38 produced net soluble zinc in broth to the tune of 6.1, 5.9, 5.63, and 5.6 μg ml-1, respectively, in zinc phosphate with the corresponding pH of 4.48, 5.31, 5.2, and 4.76. However, the bacterial strains CRS-17, CRS-30, CRS-38, and CRS-9 showed maximum zinc phosphate solubilization efficiency of 427.79, 317.39, 253.57, and 237.04%, respectively. The four bacterial isolates were identified as Bacillus glycinifermentans CRS-9, Microbacterium oxydans CRS-17, Paenarthrobacter nicotinovorans CRS-30, and Bacillus tequilensis CRS-38 on the basis of morphological and biochemical studies and 16S rRNA gene sequencing. Bacterial inoculants significantly colonized the roots of wheat plants and formed a biofilm in the root matrix. These strains significantly increased seed germination (%) and vigor indices in wheat grown under glasshouse conditions. After 30 days of sowing of wheat under microcosm conditions, eight zinc transporter (TaZIP) genes were expressed maximally in roots, with concomitant accumulation of higher zinc content in the bacterially treated plant compared to the absolute control. Out of the four strains tested, two bacteria, B. tequilensis CRS-38 and P. nicotinovorans CRS-30, improved seed germination (%), vigor indices (2-2.5 folds), plant biomass, grain yield (2.39 g plant-1), and biofortificated grains (54.25 μg g-1Zn) of wheat. To the best of our knowledge, this may be the first report on the presence of zinc solubilization trait in B. glycinifermentans CRS-9, M. oxydans CRS-17, and P. nicotinovorans CRS-30.
Collapse
Affiliation(s)
- Ramesh Chandra Yadav
- Amity Institute of Microbial Technology, Amity University, Noida, India
- Plant-Microbe Interaction and Rhizosphere Biology Lab, ICAR-National Bureau of Agriculturally Important Microorganisms, Kushmaur, India
| | - Sushil K. Sharma
- Plant-Microbe Interaction and Rhizosphere Biology Lab, ICAR-National Bureau of Agriculturally Important Microorganisms, Kushmaur, India
| | - Ajit Varma
- Amity Institute of Microbial Technology, Amity University, Noida, India
| | - Mahendra Vikram Singh Rajawat
- Plant-Microbe Interaction and Rhizosphere Biology Lab, ICAR-National Bureau of Agriculturally Important Microorganisms, Kushmaur, India
| | - Mohammad Shavez Khan
- Plant-Microbe Interaction and Rhizosphere Biology Lab, ICAR-National Bureau of Agriculturally Important Microorganisms, Kushmaur, India
| | - Pawan K. Sharma
- Plant-Microbe Interaction and Rhizosphere Biology Lab, ICAR-National Bureau of Agriculturally Important Microorganisms, Kushmaur, India
| | - Deepti Malviya
- Plant-Microbe Interaction and Rhizosphere Biology Lab, ICAR-National Bureau of Agriculturally Important Microorganisms, Kushmaur, India
| | - Udai B. Singh
- Plant-Microbe Interaction and Rhizosphere Biology Lab, ICAR-National Bureau of Agriculturally Important Microorganisms, Kushmaur, India
| | - Jai P. Rai
- Department of Mycology and Plant Pathology, Institute of Agricultural Sciences, Banaras Hindu University, Varanasi, India
| | - Anil K. Saxena
- Plant-Microbe Interaction and Rhizosphere Biology Lab, ICAR-National Bureau of Agriculturally Important Microorganisms, Kushmaur, India
| |
Collapse
|
2
|
Stadermann KB, Blom J, Borgmeier C, Sciberras N, Herbold S, Kipker M, Meurer G, Molck S, Petri D, Pelzer S, Schneider J. First complete genome sequence of Bacillus glycinifermentans B-27. J Biotechnol 2017; 257:187-191. [PMID: 28438580 DOI: 10.1016/j.jbiotec.2017.04.021] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/14/2016] [Revised: 04/18/2017] [Accepted: 04/18/2017] [Indexed: 01/20/2023]
Abstract
The first complete genome sequence of Bacillus glycinifermentans B-27 was determined by SMRT sequencing generating a genome sequence with a total length of 4,607,442 bases. Based on this sequence 4738 protein-coding sequences were predicted and used to identify gene clusters that are related to the production of secondary metabolites such as Lichenysin, Bacillibactin and Bacitracin. This genomic potential combined with the ability of B. glycinifermentans B-27 to grown in bile containing media might contribute to a future application of this strain as probiotic in productive livestock potentially inhibiting competing and pathogenic organisms.
Collapse
Affiliation(s)
- Kai Bernd Stadermann
- Evonik Nutrition and Care GmbH, Halle (Westf.), Germany; Genome Research, Faculty of Biology, Bielefeld University, Bielefeld, Germany; Bioinformatics Resource Facility, Centre for Biotechnology, Bielefeld University, Bielefeld, Germany
| | - Jochen Blom
- Bioinformatics and Systems Biology, Justus-Liebig-University Giessen, Giessen, Germany
| | | | | | | | - Maike Kipker
- Evonik Nutrition and Care GmbH, Halle (Westf.), Germany
| | | | - Stella Molck
- Evonik Nutrition and Care GmbH, Halle (Westf.), Germany
| | - Daniel Petri
- Evonik Nutrition and Care GmbH, Halle (Westf.), Germany
| | - Stefan Pelzer
- Evonik Nutrition and Care GmbH, Halle (Westf.), Germany
| | | |
Collapse
|