ORIGINAL ARTICLE
A comparative study of native growth-promoting rhizobacteria and commercial biofertilizer on maize (Zea mays L.) and wheat (Triticum aestivum L.) development in a saline environment
1
Department of Microbiology, School of Bioengineering and Biosciences, Lovely Professional University, Phagwara, India
A - Research concept and design; B - Collection and/or assembly of data; C - Data analysis and interpretation; D - Writing the article; E - Critical revision of the article; F - Final approval of article
Submission date: 2021-09-06
Acceptance date: 2021-11-17
Online publication date: 2022-03-04
Corresponding author
Arun Karnwal
Department of Microbiology, School of Bioengineering and Biosciences, Lovely Professional University, Phagwara, India
Department of Microbiology, School of Bioengineering and Biosciences, Lovely Professional University, Phagwara, India
Journal of Plant Protection Research 2022;62(1):49-57
HIGHLIGHTS
- Salinity stress tolerance in staple crops enhanced using native PGPRs
- Comparative analysis in the development pattern of staple crops using native rhizobacteria and commercial biofertilizer
- Effect of commercially available biofertilizer over the growth of experimental crops
KEYWORDS
TOPICS
ABSTRACT
Salinity is one of the most significant constraints to crop production in dry parts of the
world. This research emphasizes the beneficial effects of plant growth-promoting rhizobacterial
isolates (PGPR) on the physiological responses of maize and wheat in a saline
(NaCl) environment. Soil samples for the study were collected from a maize field in Baddi,
Himachal Pradesh, India. Isolated bacterial strains were screened for salt (NaCl) tolerance
and plant growth-promoting characters (i.e., indole acetic acid (IAA) production,
siderophore production, amino cyclopropane-1-carboxylic acid (ACC) deaminase activity,
hydrogen cyanide (HCN) production, and mineral phosphate solubilization). Screened
bacterial isolates were further tested in pot experiments to examine their effects on wheat
and maize growth. The treatments included five levels of bacterial inoculation (P0: control,
P1: ACC deaminase positive + siderophore producer + NaCl tolerant bacteria, P2: mineral
phosphate solubilizer + HCN producer + NaCl tolerant bacteria, P3: IAA producer + ACC
deaminase positive + NaCl tolerant bacteria, P4: bacterial consortium, P5: Phosphomax
commercial biofertilizer) and salt stress at 6 dS/m. Research findings found that exposure
to a bacterial consortium led to the highest growth parameter in maize, including shoot
length, root length, shoot and root dry weight followed by P2, P3, and P5 treatments at
6 dS/m salinity levels. However, P2 showed the best results for wheat at the same salinity
levels, followed by P3, P4 and P5 treatments. P1 treatment did not show a significant result
compared to control at 6dS/m salt level for both crops. The maximum proline content in
maize and wheat was observed in P4 (23.28 μmol · g−1) and P2 (15.52 μmol · g−1) treatments,
respectively, followed by P5 with Phosphomax biofertilizer. Therefore, the study proposed
the application of growth-promoting bacterial isolates as efficient biofertilizers in the Baddi
region of Himachal Pradesh, India.
ACKNOWLEDGEMENTS
The authors wish to thank the Bhojia Institute of Life Sciences, Budh, Baddi, H.P., India, for technical support to complete this study.
RESPONSIBLE EDITOR
Huan Zhang
CONFLICT OF INTEREST
The authors have declared that no conflict of interests exist.
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| ISSN: | 1427-4345 |
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