Green Sulfur Bacteria

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green sulfur bacteria

[′grēn ¦səl·fər bak′tir·ē·ə]
(microbiology)
A physiologic group of green photosynthetic bacteria of the Chloraceae that are capable of using hydrogen sulfide (H2S) and other inorganic electron donors.

Green Sulfur Bacteria

 

(chlorobacteria), microorganisms of the group of sulfur bacteria that contain chlorophyll and assimilate carbon dioxide by means of solar energy. The bacteria massed together have a saturated green coloration. They carry on photosynthesis in anaerobic conditions without giving off oxygen; hydrogen sulfide is the hydrogen source, but sulfur is not stored in their cells. Green sulfur bacteria contain bacteriochlorophylls, which have maximum absorption of radiation with wavelengths of 450–800 nanometers (this distinguishes green sulfur bacteria from green algae and from purple sulfur bacteria), as well as photosynthetically active carotenoids. All green sulfur bacteria be-long to the family Chlorobacteriaceae. They are represented by the mobile, nonspore-carrying bacillus with a long, polar flagellum—Chlorobium limicola, which forms chains—and Pelodictyon clathratiforme, whose cells typically form a loose net. Green sulfur bacteria live in bodies of fresh and salt water, in which they facilitate the accumulation of organic substances and take part in the sulfur cycle.

A. A. IMSHENETSKII

References in periodicals archive ?
Phylogenetic analysis of the sequences using the EzBiocloud classifier identified 14 phyla present in the Crassostrea gigas larvae and spat samples (Acidobacteria, Actinobacteria, Bacteroidetes, Calditrichaeota, Chlamydiae, Chloroflexi, Chlorobi, Cyanobacteria, Firmicutes, Parcubacteria, Peregrinibacteria, Planctomycetes, Proteobacteria, and TM6).
Analisis metagenomicos de muestras de suelos contaminados con cianuro y derivados toxicos.--Los analisis metagenomicos de las muestras de suelos contaminados con cianuro mostraron 22 filos bacterianos identificados, predominando los filos Proteobacteria (12.91%), Firmicutes (11.32%), Bacteroidetes (10.16%), Actinobacteria (11.25%), Verrucomicrobia (8.20%) y con abundancias menores se encuentraron Chloroflexi (0.73%), Synergistetes (0.59%), Thermodesulfobacteria (0.49%), Chlorobi (0.33%), Fibrobacteres (0.001%) y Gemmatimonadetes (0.001%); ademas, se reportaron tambien secuencias bacterianas no clasificadas, las cuales representan el 14.48% del total (Tabla 4).
Vogl et al., "Complete genome of Ignavibacterium album, a metabolically versatile, flagellated, facultative anaerobe from the phylum Chlorobi," Frontiers in Microbiology, vol.
Twelve bacterial phyla were more abundant in the liquor fermentation process, including Acidobacteria, Bacteroidetes, Chlorobi, Chloroflexi, Proteobacteria, and Planctomycetes.
Chloroflexi and Bacteroidetes were second and third most abundant phylum, followed by Firmicutes, Chlorobi in Cekirge, Kemalpasa and Orhaneli hot springs samples.
Polyamine analysis within the eubacterial thirteen phyla Acidobacteria Actinobacteria Chlorobi Chloroflexi Chrysiogenetes Deferribacteres Fibrobacteres Firmicutes Fusobacteria Gemmatimonadetes Nitrospirae Planctomycetes and Verrucomicrobia.
There are some differences in the distribution of bacterial phyla detected in the two libraries, especially for minor groups such as the Lentisphaerae, Nitrospirae, and Thermotogae phyla, that were present only in sample 1.2 with percent values lower than 1%, and the Chlorobi, Verrucomicrobia, Deferribacteres, and Gemmatimonadetes phyla, that were detected in sample 2.1 with fractions ranging from 1% to 2%.
Lower Kane Cave samples were taken from microbial mats and consisted of epsilon-proteobacteria (67%), gamma-proteobacteria (12%), beta-proteobacteria (12%), delta-proteobacteria (1%), acidobacteria (6%), and bacteroides and chlorobi (2%).
There was a clone that clustered with Paenibacillus durus and had an identical amino acid sequence to an unidentified forest soil bacterium (GenBank accession number AY819600), and 3 clones that clustered with the Clostridium acetobutylicum group, which consisted of published sequences from the 5-proteobacteria, firmicutes, and chlorobi. No clones clustered with either cyanobacteria or the [gamma]-proteobacteria.
A total of 12 phyla (11 bacterial phyla and 1 archaeal phylum) were identified among the 18 samples (Figure 3), including Proteobacteria, Firmicutes, Cyanobacteria, Bacteroidetes, Planctomycetes, Thaumarchaeota (archaea), Acidobacteria, Actinobacteria, Verrucomicrobia, Chloroflexi, WS3, and Chlorobi. Only a small proportion of sequences (0.88-1.87%) retrieved from the three CWs could not be affiliated with known bacterial phyla.
The dominant phyla (relative abundance > 1%) across all samples were Firmicutes (55.19% [+ or -] 16.00%), Proteobacteria (26.11% [+ or -] 14.85%), Bacteroidetes (14.80% [+ or -] 2.36%), Actinobacteria (2.03% [+ or -] 1.45%), and Chlorobi (1.17% [+ or -] 0.79%).