EFFECT OF SALINITY ON NITRATE REDUCTASE AND GLUTAMINE SYNTHETASE ENZYMES IN CYANOBACTERIA NOSTOC LINCKIA AND HAPALOSIPHON SPP.
DOI:
https://doi.org/10.22159/ijls.2025.v13.48535Keywords:
Halotolerant, Cyanobacteria, Nostoc linckia, Hapalosiphon spp. nitrate reductase, glutamine synthetaseAbstract
Effect of salinity (NaCl, 500 MM) on growth, nitrate reductase (NR), and glutamine synthase (GS) activities, and studied of the NaCl- tolerant of Cyanobacteria Nostoc linckia and Hapalosiphone spp. The past decade has seen substantial breakthroughs in understanding the biochemistry, molecular biology, and regulation of NR and GS in higher plants and blue–green algae. The objective of this study was to examine the expression and activity of NR and glutamate synthase in response to sodium chloride in halotolerant Cyanobacteria N. linckia and Hapalosiphon spp. Salinity is known to cause not only ionic and osmotic stress but also oxidative stress [1]. When a plant is exposed to high salinity, its significant procedures such as photosynthesis, protein synthesis energy, and lipid metabolisms are affected. Tijan and Ismail [2] observed that significant changes in particle and water homeostasis caused by high concentrations of salts lead to damage at the molecular level, captured growth, and even death. Environmental factors such as temperature, UV light, irradiance, drought season, and saltiness are known to influence enzymes in both Cyanobacteria and higher plants. The results of our study highlight the differential effects between the amount of sodium chloride salts on NR and GS activities in “Usar” soil Cyanobacteria N. linckia and Hapalosiphon spp.
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