Salt-induced exopolysaccharide production in azotobacter chroococcum strains under nacl and NA₂SO₄ stress conditions

Soliyeva, M.A., Rasulov, B.A.

Қўқон ДПИ. Илмий хабарлар · 2026-yil

Annotatsiya

Salinity is one of the major environmental factors limiting the growth and metabolic activity of beneficial soil microorganisms. The present study investigated the effects of NaCl and Na₂SO₄ on biomass accumulation and exopolysaccharide (EPS) production by Azotobacter chroococcum strains XH2018 and XH2020. The strains were cultivated in Ashby medium supplemented with 0.5%, 1.0%, and 2.0% concentrations of NaCl or Na₂SO₄. Biomass and EPS production were determined after cultivation under shaking conditions. The results showed that both strains were able to grow under salt stress; however, their responses varied depending on the salt type and concentration. Strain XH2020 generally produced higher biomass than strain XH2018 under most experimental conditions. The highest biomass values were recorded at 2% NaCl and 0.5% Na₂SO₄, reaching 6.2 g/L in strain XH2020. Salt stress also significantly influenced EPS biosynthesis. Under NaCl treatment, moderate increases in EPS production were observed in both strains. In contrast, Na₂SO₄ strongly stimulated EPS synthesis, particularly in strain XH2020. The highest EPS yield (15.0 g/L) was obtained at 2% Na₂SO₄, whereas the maximum EPS production by strain XH2018 was 4.4 g/L under the same conditions. These findings indicate that sulfate-induced salt stress enhances EPS production more effectively than NaCl and that strain XH2020 possesses superior adaptive mechanisms for coping with saline environments. The high EPS-producing capacity of strain XH2020 under Na₂SO₄ stress highlights its potential for agricultural and biotechnological applications in saline environments.

Maqola ma’lumotlari
MualliflarSoliyeva, M.A., Rasulov, B.A.
JurnalҚўқон ДПИ. Илмий хабарлар
NashriyotҚўқон давлат педагогика институти
ISSN3030-3958
Nashr sanasi2026-09-05
Jild8
Son6
Betlar580-586
TilIngliz
Ilmiy sohaPsixologiya
DOI10.70728/a.series.tab.v08.i06.079
Indeksga qo‘shilgan2026-09-06

DOI: 10.70728/a.series.tab.v08.i06.079 · Maqolaning asl sahifasi

Kalit so‘zlar

Azotobacter chroococcum, exopolysaccharides, EPS, salinity stress, NaCl, sodium sulfate, biomass production, alginate.

Ilmiy soha

Psixologiya

Iqtibos keltirish

APASoliyeva, M.A., & Rasulov, B.A. (2026). SALT-INDUCED EXOPOLYSACCHARIDE PRODUCTION IN AZOTOBACTER CHROOCOCCUM STRAINS UNDER NACL AND NA₂SO₄ STRESS CONDITIONS. Қўқон ДПИ. Илмий хабарлар, 8(6), 580-586. https://doi.org/10.70728/a.series.tab.v08.i06.079
GOST (OAK)Soliyeva, M.A., Rasulov, B.A. SALT-INDUCED EXOPOLYSACCHARIDE PRODUCTION IN AZOTOBACTER CHROOCOCCUM STRAINS UNDER NACL AND NA₂SO₄ STRESS CONDITIONS // Қўқон ДПИ. Илмий хабарлар. – 2026. – T. 8, № 6. – P. 580-586. – DOI: 10.70728/a.series.tab.v08.i06.079.
MLASoliyeva, M.A., and Rasulov, B.A. “SALT-INDUCED EXOPOLYSACCHARIDE PRODUCTION IN AZOTOBACTER CHROOCOCCUM STRAINS UNDER NACL AND NA₂SO₄ STRESS CONDITIONS.” Қўқон ДПИ. Илмий хабарлар, 8(6), 580-586, 2026. https://doi.org/10.70728/a.series.tab.v08.i06.079
ChicagoSoliyeva, M.A., and Rasulov, B.A. “SALT-INDUCED EXOPOLYSACCHARIDE PRODUCTION IN AZOTOBACTER CHROOCOCCUM STRAINS UNDER NACL AND NA₂SO₄ STRESS CONDITIONS.” Қўқон ДПИ. Илмий хабарлар, 8(6), 580-586 (2026). https://doi.org/10.70728/a.series.tab.v08.i06.079
HarvardSoliyeva, M.A., and Rasulov, B.A (2026) ‘SALT-INDUCED EXOPOLYSACCHARIDE PRODUCTION IN AZOTOBACTER CHROOCOCCUM STRAINS UNDER NACL AND NA₂SO₄ STRESS CONDITIONS’, Қўқон ДПИ. Илмий хабарлар, 8(6), 580-586. https://doi.org/10.70728/a.series.tab.v08.i06.079
BibTeX
@article{soliyevama2026,
  title = {SALT-INDUCED EXOPOLYSACCHARIDE PRODUCTION IN AZOTOBACTER CHROOCOCCUM STRAINS UNDER NACL AND NA₂SO₄ STRESS CONDITIONS},
  author = {Soliyeva, M.A. and Rasulov, B.A.},
  journal = {Қўқон ДПИ. Илмий хабарлар},
  year = {2026},
  volume = {8},
  number = {6},
  pages = {580-586},
  doi = {10.70728/a.series.tab.v08.i06.079},
  url = {https://doi.org/10.70728/a.series.tab.v08.i06.079}
}

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