Synergistic Effect of Serratia fonticola and Pseudomonas koreensis on Mitigating Salt Stress in Cucumis sativus L
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View abstract on PubMed
Summary
This summary is machine-generated.Plant growth-promoting rhizobacteria (PGPRs) like Serratia fonticola and Pseudomonas koreensis enhance cucumber growth under salt stress. Their synergistic application significantly boosts biomass, chlorophyll, and stress tolerance by regulating ion transporters.
Area Of Science
- Microbiology
- Plant Science
- Agronomy
Background
- Beneficial microbes, known as plant growth-promoting rhizobacteria (PGPRs), improve plant development, especially under stress.
- Serratia fonticola (S1T1) and Pseudomonas koreensis (S4T10) are salt-tolerant PGPRs with multiple beneficial traits.
- Salinity stress significantly impacts crop yield and quality, necessitating strategies for mitigation.
Purpose Of The Study
- To evaluate the synergistic effect of S1T1 and S4T10 on mitigating salinity stress in Cucumis sativus (cucumber).
- To assess the impact of these PGPRs on cucumber growth parameters, physiological attributes, and gene expression under salt stress.
Main Methods
- Cucumber plants were subjected to 200 mM salinity stress with inoculation of S1T1, S4T10, or both.
- Plant growth parameters (biomass, chlorophyll content), physiological indicators (water potential, abscisic acid, electrolytic leakage), antioxidant levels, and antioxidant enzyme activities were measured.
- The expression of key ion transporter genes (HKT1, NHX, SOS1) was analyzed.
Main Results
- Synergistic inoculation of S1T1 and S4T10 significantly increased fresh (28%) and dry (24%) biomass compared to uninoculated plants.
- PGPR treatment improved water potential (up to 38%) and reduced abscisic acid levels (up to 28%) and electrolytic leakage.
- A decrease in oxidative stress markers (malondialdehyde, hydrogen peroxide, superoxide anions) and an increase in antioxidant enzymes (catalase, superoxide dismutase) were observed.
- Upregulation of ion transporter genes HKT1 (1-2-fold), NHX (1-3-fold), and SOS1 (2-4-fold) was noted, enhancing NaCl stress tolerance.
Conclusions
- The synergistic application of Serratia fonticola and Pseudomonas koreensis effectively mitigates salinity stress in Cucumis sativus.
- These PGPRs enhance cucumber growth and physiological resilience by modulating oxidative stress and ion transport mechanisms.
- The study highlights the potential of multi-trait PGPRs for sustainable agriculture in saline environments.
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