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Related Experiment Video

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Experimental Protocol for Detecting Cyanobacteria in Liquid and Solid Samples with an Antibody Microarray Chip

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Allochromatium phaeobacterium sp. nov.

T N R Srinivas¹, P Anil Kumar, K Sucharitha

¹Bacterial Discovery Laboratory, Centre for Environment, Institute of Science and Technology, J. N. T. University, Kukatpally, Hyderabad 500 085, India.

International Journal of Systematic and Evolutionary Microbiology

|March 31, 2009

Summary

A novel purple sulfur bacterium, Allochromatium phaeobacterium sp. nov., was isolated from Indian brackish water. This phototrophic bacterium exhibits unique physiological traits and expands the Allochromatium genus within Gammaproteobacteria.

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Area of Science:

Microbiology
Bacteriology
Phototrophic bacteria

Background:

Purple sulfur bacteria are crucial in aquatic ecosystems.
The genus Allochromatium comprises diverse phototrophic species.
Isolation of novel bacteria aids in understanding microbial diversity.

Purpose of the Study:

To isolate and characterize a novel purple sulfur bacterium.
To determine the phylogenetic placement of the new isolate.
To propose a new species within the Allochromatium genus.

Main Methods:

Isolation of bacteria from brackish water.
Gram staining, motility tests, and salt tolerance determination.
Analysis of photosynthetic pigments and growth modes.
Phylogenetic analysis using 16S rRNA gene sequences.

Main Results:

A novel rod-shaped, phototrophic, purple sulfur bacterium (Strain JA144(T)) was isolated.
The bacterium is Gram-negative, motile, and tolerates up to 3% NaCl.
Phylogenetic analysis placed Strain JA144(T) within the Allochromatium genus.
High 16S rRNA gene sequence similarity to Allochromatium vinosum (96.7%) was observed.

Conclusions:

Strain JA144(T) represents a new species, Allochromatium phaeobacterium sp. nov.
The new species expands the known diversity of the Allochromatium genus.
This finding contributes to the understanding of phototrophic bacteria in marine environments.