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Modulation in Biofertilization and Biofortification of Wheat Crop by Inoculation of Zinc-Solubilizing Rhizobacteria

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Title Modulation in Biofertilization and Biofortification of Wheat Crop by Inoculation of Zinc-Solubilizing Rhizobacteria
Not Available
 
Creator Ramesh Chandra Yadav1,2, Sushil K. Sharma2 * † , Ajit Varma1 , Mahendra Vikram Singh Rajawat2 , Mohammad Shavez Khan2 , Pawan K. Sharma2 , Deepti Malviya2 , Udai B. Singh2 *, Jai P. Rai3 and Anil K. Saxena2
 
Subject rhizobacteria, wheat, zinc phosphate, biofortification, zinc-solubilizing rhizobacteria
 
Description Not Available
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
Not Available
 
Date 2024-06-24T16:52:11Z
2024-06-24T16:52:11Z
2022-01-01
 
Type Research Paper
 
Identifier Not Available
Not Available
http://krishi.icar.gov.in/jspui/handle/123456789/83757
 
Language English
 
Relation Not Available;
 
Publisher Not Available