Abstract
The present study demonstrates the plant growth promoting (PGP) potential of a bacterial isolate CDP-13 isolated from 'Capparis decidua' plant, and its ability to protect plants from the deleterious effect of biotic and abiotic stressors. Based on 16S rRNA gene sequence analysis, the isolate was identified as Serratia marcescens. Among the PGP traits, the isolate was found to be positive for ACC deaminase activity, phosphate solubilization, production of siderophore, indole acetic acid production, nitrogen fixation, and ammonia production. CDP-13 showed growth at an increased salt (NaCl) concentration of up to 6%, indicating its potential to survive and associate with plants growing in saline soil. The inoculation of S. marcescens enhanced the growth of wheat plant under salinity stress (150-200 mM). It significantly reduced inhibition of plant growth (15 to 85%) caused by salt stressors. Application of CDP-13 also modulated concentration (20 to 75%) of different osmoprotectants (proline, malondialdehyde, total soluble sugar, total protein content, and indole acetic acid) in plants suggesting its role in enabling plants to tolerate salt stressors. In addition, bacterial inoculation also reduced the disease severity caused by fungal infection, which illustrated its ability to confer induced systemic resistance (ISR) in host plants. Treatment of wheat plants with the test organism caused alteration in anti-oxidative enzymes activities (Superoxide dismutase, Catalase, and Peroxidase) under various salinity levels, and therefore minimizes the salinity-induced oxidative damages to the plants. Colonization efficiency of strain CDP-13 was confirmed by CFU count, epi-fluorescence microscopy, and ERIC-PCR-based DNA fingerprinting approach. Hence, the study indicates that bacterium CDP-13 enhances plant growth, and has potential for the amelioration of salinity stress in wheat plants. Likewise, the results also provide insights into biotechnological approaches to using PGPR as an alternative to chemicals and pesticides.
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Claims 6
Claim · model-written summary
Serratia marcescens inoculation enhanced wheat growth under salinity stress.
- Taxon
- wheat
Triticum aestivume0 - Treatment
- inoculation of S. marcescense0
- Interactor
- S. marcescens
Serratia marcescense0symbiont - Outcome
- growth of wheat plante0
- Direction
- enhancede0
- Qualifier
- salinity stress (150-200 mM)e0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Wheat (Triticum aestivum L.)”
e0“The inoculation of S. marcescens enhanced the growth of wheat plant under salinity stress (150-200 mM).”
Claim · model-written summary
CDP-13 significantly reduced salt-induced inhibition of plant growth by 15 to 85%.
- Taxon
- WheatTriticum aestivumt0
- Outcome
- inhibition of plant growthe0
- Direction
- reducede0
- Value
- 15 to 85%e0
Not reportedTreatmentComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Wheat (Triticum aestivum L.)”
e0“It significantly reduced inhibition of plant growth (15 to 85%) caused by salt stressors.”
Claim · model-written summary
CDP-13 application modulated osmoprotectant concentrations in plants by 20 to 75%.
- Taxon
- WheatTriticum aestivumt0
- Treatment
- Application of CDP-13e0
- Outcome
- concentratione0
- Value
- 20 to 75%e0
- Qualifier
- different osmoprotectants (proline, malondialdehyde, total soluble sugar, total protein content, and indole acetic acid)e0
Not reportedComparatorDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Wheat (Triticum aestivum L.)”
e0“Application of CDP-13 also modulated concentration (20 to 75%) of different osmoprotectants (proline, malondialdehyde, total soluble sugar, total protein content, and indole acetic acid) in plants”
Claim · model-written summary
Bacterial inoculation reduced fungal disease severity in host plants.
- Taxon
- WheatTriticum aestivumt0
- Treatment
- bacterial inoculatione0
- Interactor
- fungale0pathogen
- Outcome
- disease severity caused by fungal infectione0
- Direction
- reducede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Wheat (Triticum aestivum L.)”
e0“bacterial inoculation also reduced the disease severity caused by fungal infection”
Claim · model-written summary
Treatment with the bacterium altered antioxidant enzyme activities under salinity.
- Taxon
- wheatTriticum aestivume0
- Treatment
- Treatment of wheat plants with the test organisme0
- Outcome
- anti-oxidative enzymes activitiese0
- Qualifier
- under various salinity levelse0
Not reportedComparatorDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Wheat (Triticum aestivum L.)”
e0“Treatment of wheat plants with the test organism caused alteration in anti-oxidative enzymes activities (Superoxide dismutase, Catalase, and Peroxidase) under various salinity levels”
Claim · model-written summary
Colonization by CDP-13 was confirmed using three assays.
- Taxon
- WheatTriticum aestivumt0
- Interactor
- strain CDP-13e0symbiont
- Outcome
- Colonization efficiency of strain CDP-13e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Wheat (Triticum aestivum L.)”
e0“Colonization efficiency of strain CDP-13 was confirmed by CFU count, epi-fluorescence microscopy, and ERIC-PCR-based DNA fingerprinting approach.”
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