Related Experiment Video
Updated: Jun 29, 2026

Development of a Cabbage Protoplast System for Studying Hypoxia Tolerance in Brassica
Published on: September 20, 2024
Chromium (VI) tolerance in two halotolerant strains of Nostoc
Bala Kiran1, Nisha Rani, Anubha Kaushik
1Department of Environmental Science and Engineering, Guru Jambheshwar University of Science and Technology, Hisar, India.
Abstract:
The present study reports on chromium (VI) tolerance of two cyanobacterial strains Nostoc linckia and Nostoc spongiaeforme isolated from salt affected soils using uni-algal and bi-algal systems. Besides distinct halophilism, the two strains exhibited remarkable tolerance to chromium (VI) and revealed 1.2 to 2.8 times more chlorophyll in the presence of the metal. While phycobilins and carotenoids also increased in Nostoc linckia with total dissolved salts (TDS) as well as metal, a decline was observed in Nostoc spongiaeforme in the presence of Cr (VI). Relative algal biomass (as % of control) showed significantly higher values (123-239) in Nostoc linckia in the presence of salt, metal and combination of the two. In Nostoc spongiaeforme it declined in the presence of metal (72-81) but increased in the presence of salts (143-249) and also in the binary systems (121-440). The bi-algal consortium showed relatively less tolerance to salt and metal stress. Nostoc linckia (20 day culture) showed upto 40% chromium removal whereas Nostoc spongiaeforme showed up to 12% removal, indicating greater suitability of the former for use in bioremediation studies.
More Related Videos
Related Concept Videos
Halogenation of Alkenes
Consider the bromination of cyclopentene. Molecular bromine is polarized in the proximity of the π electrons of cyclopentene. An electrophilic bromine atom adds across the double bond, forming a cyclic bromonium ion intermediate.
Responses to Salt Stress
Metabolism of Chemolithotrophs
Microbial Nutrition
Bacterial Phylum Cyanobacteria
Anoxygenic Phototrophic Bacteria

