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Microbial Biofertilizers for Salinity Stress Mitigation in Hydroponic Systems.

Prabhaharan Renganathan1, Lira A Gaysina1,2,3, Edgar Omar Rueda-Puente4

  • 1Department of Bioecology and Biological Education, M. Akmullah Bashkir State Pedagogical University, 450000 Ufa, Russia.

Current Issues in Molecular Biology
|January 30, 2026
PubMed
Summary
This summary is machine-generated.

Microbial biofertilizers enhance salinity resilience in hydroponic agriculture by regulating ion transport and nutrient uptake. This sustainable approach offers a promising alternative to traditional methods for improving crop yield under saline conditions.

Keywords:
ACC deaminaseencapsulation technologyexopolysaccharideshydroponicsionic homeostasisplant growth-promoting bacteria

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Area of Science:

  • Agricultural Science
  • Microbiology
  • Plant Physiology

Background:

  • Salinity accumulation is a major abiotic stress in hydroponic systems, increasing nutrient solution conductivity and negatively impacting crop yield.
  • Conventional methods like dilution and flushing are costly, increase water usage, and lead to nutrient discharge.
  • Hydroponic crops suffer from osmotic stress, disrupted nutrient balance, and reduced water uptake due to high salinity.

Purpose of the Study:

  • To review the drivers of salinity stress in hydroponics and explore microbial solutions.
  • To synthesize evidence on the efficacy of microbial biofertilizers in saline hydroponic environments.
  • To identify research gaps and future directions for microbial applications in hydroponics.

Main Methods:

  • Literature review synthesizing physiological, microbial, and system-level factors of salinity stress.
  • Analysis of existing research on microbial inoculation strategies for saline hydroponics.
  • Identification of challenges and opportunities in microbial delivery and application.

Main Results:

  • Microbial biofertilizers promote salinity resilience through ion transport regulation, osmolyte accumulation, and antioxidant enhancement.
  • Mechanisms include exopolysaccharide production, phytohormonal modulation, and siderophore-mediated nutrient mobilization.
  • Evidence supports microbial inoculation as a sustainable strategy for mitigating salinity stress in hydroponics.

Conclusions:

  • Microbial biofertilizers offer a sustainable alternative to traditional salinity management in hydroponics.
  • Further research is needed on formulation stability, disinfection compatibility, and commercial-scale validation.
  • Optimized delivery systems like encapsulation and consortium-based inoculation are key for successful microbial colonization in soilless systems.