Effect of Chromium Oxide on the Growth Efficiency of Phormidium autumnale (Agardh)

By : S. Bagampriyal, B. Sadhana

Page No: 62-69

Abstract
Cyanobacteria are a diverse group of photosynthetic procaryotic organisms grow well in different environments. They have an ability to fix atmospheric nitrogen. It can grow in heavy metal polluted environment by adsorbing the metal ions from the surrounding aquatic system. The present study analyzed the effect of chromium oxide concentrations on the growth of Phormidium autumnale by estimating the photosynthetic efficiency and physiological tolerance of organisms. Phormidium autumnale was isolated from the paddy field soil of Sakkimangalam, Madurai district, Tamil Nadu by using Blue green algal medium. It was treated with various concentrations of chromium oxide from 0.1ppm to 1ppm and estimating the photosynthetic pigments: chlorophyll a, phycocyanin, phycoerythrin, allophycocyanins and total nitrogen, protein and ammonia excretion in the culture medium. This study reported that the various concentrations of such chromium ions enhanced the photosynthetic and physiological efficiency of Phormidium autumnale and was well grown at the low concentrations of chromium ions. It was confirmed by estimating its photosynthetic efficiency, nitrogen fixation, protein content and ammonia excretion by the algal cells at various concentrations of chromium oxide. Its higher concentration affected the Phormidium growth when compared to control. This organism showed metal tolerance against the lower concentrations of Chromium oxide. Thus, this work has suggested that the application of cyanobacteria: Phormidium species distribution in the paddy field soil pretentiously fixed atmospheric nitrogen and showed the tolerance effect against the various applications of agro-chemicals with heavy metals generally applied in crop fields. The novelty of the work stated that the Cyanobacteria Phormidium showed metal tolerance against the chromium oxide at lower concentrations in aquatic medium.

Authors:
S. Bagampriyal : Thiagarajar College, Madurai, Tamil Nadu, India.
B. Sadhana : P.G Department of Botany, Thiagarajar College, Madurai, Tamil Nadu, India.
 

DOI: https://doi.org/10.32381/JPSR.2024.40.01.8