Effects of Osmotic Stress on Growth, Photosynthesis, and Pigment Composition in the cyanobacterium Nostoc muscorum

Antim Choudhary

International Journal of Scientific Research in Science and Technology, 2025, vol. 12, issue 6, 969-972

Abstract: Aim : To investigate the effects of osmotic stress induced by sodium chloride (NaCl) on growth, photosynthetic efficiency, and pigment composition of the cyanobacterium Nostoc muscorum. Methodology : Exponentially growing cultures of Nostoc muscorum were exposed to different concentrations of NaCl (0, 50, 100 and 150 mM). Growth was measured through optical density and specific growth rate. Photosynthetic oxygen evolution was determined using a Clark-type oxygen electrode. Chlorophyll-a, carotenoids and phycobiliproteins were estimated spectrophotometrically. Statistical analysis was performed using one-way ANOVA at p

Keywords: Nostoc muscorum; osmotic stress; salinity; photosynthesis; chlorophyll-a; phycobiliproteins; cyanobacteria (search for similar items in EconPapers)
Date: 2025
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