Meganema

Genus nameMeganema
SourcePublished
Alternative namesEikelboom type 021N-like
NCBI taxonomy ID356797

Taxonomy

KingdomBacteria
FamilyMeganemaceae
GenusMeganema

16S gene copy number1
GenomesYes1

 In situOther
Filamentous234
Hydrophobic cell surface2


Grey-scale brightfield micrograph of M. perideroedes Gr1T stained with safranin O. Scale bar represents 10 microns. - Source:1

Aerobic heterotroph
Nitrite reduction
Fatty acids
Sugars
Proteins/Amino acids

POSNEGVariableNot assessed

Description

Filamentous organisms that are most often observed in industrial plants, where they are implicated in bulking 2 3 4. Aerobic heterotrophs. Some may reduce nitrate and perhaps nitrite. In situ accumulation of acetate, propionate, glucose and amino acids 2. They can accumulate large amounts of PHA 2 3. An annotated ability for methylotrophy was not supported for axenic culture or for in situ strains 1. Their prevalence in industrial WWTPs, without the anaerobic tanks implemented in EBPR plants, indicates their ability to assimilate PHA likely provides advantage during intermittent periods of carbon starvation or under the unbalanced growth conditions (i.e. high COD to N:P ratio) that often characterize industrial waste streams 1.

Show full entry

Distribution plant/process configuration

Common in plants with carbon removal and nitrification treating industrial wastewater; rare in plants with nutrient removal 2 3 4.

FISH probes

Meg1028 + Meg983 4

Metabolism

 In situOther
Autotroph/Mixotroph2
AOB1
NOB1
Anammox1
Aerobic Heterotroph234
PAO231
GAO23
Nitrite Reduction231
Sulphate Reduction1
Fermentation234
Acetogen
Methanogen1
Fatty Acids23
Sugars231
Proteins/Amino Acids23

Abundance Information

 10 % percentileMedian90 % percentile
Influent000.1
Activated Sludge00.10.3
Digester-Mesophilic000.1
Digester-Thermophilic000.1

Predominant InActivated sludge

References

[1] McIlroy, Lapidus, Thomsen, Han, Haynes, Lobos, et al. - High quality draft genome sequence of Meganema perideroedes str. Gr1(T) and a proposal for its reclassification to the family Meganemaceae fam. nov. - Stand Genomic Sci 10(): 23. doi:10.1186/s40793-015-0013-1

[2] Kragelund, Nielsen, Thomsen, Nielsen - Ecophysiology of the filamentous Alphaproteobacterium Meganema perideroedes in activated sludge. - FEMS Microbiol. Ecol. 54(1): 111-22. doi:10.1016/j.femsec.2005.03.002

[3] Kragelund, Kong, van der Waarde, Thelen, Eikelboom, Tandoi, et al. - Ecophysiology of different filamentous Alphaproteobacteria in industrial wastewater treatment plants. - Microbiology (Reading, Engl.) 152(Pt 10): 3003-12. doi:10.1099/mic.0.29249-0

[4] Thomsen, Blackall, de Muro, Nielsen, Nielsen - Meganema perideroedes gen. nov., sp. nov., a filamentous alphaproteobacterium from activated sludge. - Int. J. Syst. Evol. Microbiol. 56(Pt 8): 1865-8. doi:10.1099/ijs.0.02916-0

Hide details

comments powered by Disqus

The online MiDAS field guide is licensed under a Creative Commons Attribution-ShareAlike 4.0 International License.

 

The MiDAS taxonomy is a manual curation of the Silva database and is redistributed for non-commercial use only.

 

Citing MiDAS: McIlroy S.J., Saunders A.M., Albertsen M., Nierychlo M., McIlroy B., Hansen A.A., Karst S.M., Nielsen J.L., Nielsen P.H. (2015) MiDAS: the field guide to the microbes of activated sludge. Database, Vol. 2015

Contact us at mail@midasfieldguide.org