Microbial potential for the anaerobic degradation of simple aromatic compounds in sediments of the Milwaukee Harbor, Green Bay and Lake Erie

1994 ◽  
Vol 13 (3) ◽  
pp. 461-471 ◽  
Author(s):  
Charles R. Myers ◽  
Laura J. Alatalo ◽  
Judith M. Myers
Keyword(s):  
Aromatic Compounds ◽  
Anaerobic Degradation ◽  
Lake Erie ◽  
Green Bay ◽  
Microbial Potential

Occurrence and diversity of the oxidative hydroxyhydroquinone pathway for the anaerobic degradation of aromatic compounds in nitrate‐reducing bacteria

2019 ◽  
Vol 11 (4) ◽  
pp. 525-537 ◽  
Author(s):  
Daniel Pacheco‐Sánchez ◽  
Ramón Rama‐Garda ◽  
Patricia Marín ◽  
Sophie‐Marie Martirani‐Von Abercron ◽  
Silvia Marqués
Keyword(s):  
Aromatic Compounds ◽  
Anaerobic Degradation ◽  
Reducing Bacteria ◽  
Nitrate Reducing Bacteria

Anaerobic degradation of homocyclic aromatic compounds via arylcarboxyl-coenzyme A esters: organisms, strategies and key enzymes

2013 ◽  
Vol 16 (3) ◽  
pp. 612-627 ◽  
Author(s):  
Matthias Boll ◽  
Claudia Löffler ◽  
Brandon E. L. Morris ◽  
Johannes W. Kung
Keyword(s):  
Aromatic Compounds ◽  
Anaerobic Degradation ◽  
Coenzyme A ◽  
Key Enzymes ◽  
Coenzyme A Esters

Walleye (Stizostedion vitreum vitreum) Fluctuations in the Great Lakes and Possible Causes, 1800–1975

1977 ◽  
Vol 34 (10) ◽  
pp. 1878-1889 ◽  
Author(s):  
J. C. Schneider ◽  
J. H. Leach
Keyword(s):  
Great Lakes ◽  
Lake Erie ◽  
Lake Superior ◽  
Lake Huron ◽  
Stizostedion Vitreum ◽  
Spawning Habitat ◽  
Green Bay ◽  
Western Lake ◽  
Foreign Species ◽  
Western Lake Erie

Changes in walleye (Stizostedion vitreum vitreum) stocks in the Great Lakes from 1800 to 1975 were linked to proliferation of foreign species of fish and culturally induced sources of stress — exploitation, nutrient loading, alteration of spawning habitat, and toxic materials. During the 1800s, three small spawning stocks (and probably many others) were damaged or destroyed because of either overfishing or elimination of spawning habitat through logging, pollution, or damming.During 1900–40, stocks in the Michigan waters of Lake Superior, southern Green Bay, the Thunder Bay River of Lake Huron, the North Channel of Lake Huron, and the New York waters of Lake Ontario declined gradually. Pollution, in general, and degradation of spawning habitat, in particular, probably caused three of the declines and overexploitation was suspected in two instances. In addition, the decline of three of these stocks occurred when rainbow smelt (Osmerus mordax) were increasing.During 1940–75, stocks in seven areas declined abruptly: Saginaw Bay (1944), northern Green Bay (1953), Muskegon River (mid-1950s), western Lake Erie (1955), Nipigon Bay (late 1950s), Bay of Quinte (1960), and Black Bay (mid-1960s). The decline of each stock was associated with a series of weak year-classes. The stocks were exposed to various sources of stress, including overexploitation, pollution, and interaction with foreign species, which, if not important in the decline, may be suppressing recovery. Only the western Lake Erie stock recovered, in part due to a reduction in exploitation and, possibly, because of the relatively low density of smelt and alewives (Alosa pseudoharengus) in the nursery areas.Relatively stable stocks persisted in five areas: Wisconsin waters of Lake Superior, Lake St. Clair — southern Lake Huron, eastern Lake Erie, northern Lake Huron, and parts of Georgian Bay. Pollution problems were relatively minor in these areas and exploitation was light during recent decades. Apparently these stocks were more capable of withstanding the additional stresses exerted by alien species. Key words: population fluctuations, Percidae, Stizostedion, Great Lakes walleye, history of fisheries, summary of stresses, harvests, management implications

scholarly journals Anaerobic Degradation of 4-Methylbenzoate by a Newly Isolated Denitrifying Bacterium, Strain pMbN1

2011 ◽  
Vol 78 (5) ◽  
pp. 1606-1610 ◽  
Author(s):  
Sven Lahme ◽  
Jens Harder ◽  
Ralf Rabus
Keyword(s):  
Aromatic Compounds ◽  
Anaerobic Degradation ◽  
Gene Sequence ◽  
Rrna Gene ◽  
Rrna Gene Sequence ◽  
Content Type ◽  
Denitrifying Bacterium ◽  
Reducing Conditions ◽  
Gene Sequence Analysis ◽  
Bacterium Strain

ABSTRACTA novel alphaproteobacterium isolated from freshwater sediments, strain pMbN1, degrades 4-methylbenzoate to CO2under nitrate-reducing conditions. While strain pMbN1 utilizes several benzoate derivatives and other polar aromatic compounds, it cannot degradep-xylene or other hydrocarbons. Based on 16S rRNA gene sequence analysis, strain pMbN1 is affiliated with the genusMagnetospirillum.

scholarly journals Anaerobic degradation of syringic acid by an adapted strain of Rhodopseudomonas palustris

2019 ◽  
Author(s):  
J. Zachary Oshlag ◽  
Yanjun Ma ◽  
Kaitlin Morse ◽  
Brian T. Burger ◽  
Rachelle A. Lemke ◽  
...  
Keyword(s):  
Aromatic Compounds ◽  
Anaerobic Degradation ◽  
Fossil Fuels ◽  
Plant Biomass ◽  
Rhodopseudomonas Palustris ◽  
Reducing Power ◽  
Sole Source ◽  
Syringic Acid ◽  
Detailed Knowledge ◽  
Acid Degradation

ABSTRACTWhile lignin represents a major fraction of the carbon in plant biomass, biological strategies to convert the components of this heterogenous polymer into products of industrial and biotechnological value are lacking. Syringic acid (3,5-dimethoxy-4-hydroxybenzoic acid) is a byproduct of lignin degradation, appearing in lignocellulosic hydrolysates, deconstructed lignin streams, and other agricultural products. Rhodopseudomonas palustris CGA009 is a known degrader of phenolic compounds under photoheterotrophic conditions, via the benzoyl-CoA degradation (BAD) pathway. However, R. palustris CGA009 is reported to be unable to metabolize meta-methoxylated phenolics such as syringic acid. We isolated a strain of R. palustris (strain SA008.1.07), adapted from CGA009, which can grow on syringic acid under photoheterotrophic conditions, utilizing it as a sole source of organic carbon and reducing power. An SA008.1.07 mutant with an inactive benzoyl-CoA reductase structural gene was able to grow on syringic acid, demonstrating that the metabolism of this aromatic compound is not through the BAD pathway. Comparative gene expression analyses of SA008.1.07 implicated the involvement of products of the vanARB operon (rpa3619-rpa3621), which has been described as catalyzing aerobic aromatic ring demethylation in other bacteria, in anaerobic syringic acid degradation. In addition, experiments with a vanARB deletion mutant demonstrated the involvement of the vanARB operon in anaerobic syringic acid degradation. These observations provide new insights into the anaerobic degradation of meta-methoxylated and other aromatics by R. palustris.IMPORTANCELignin is the most abundant aromatic polymer on Earth and a resource that could eventually substitute for fossil fuels as a source of aromatic compounds for industrial and biotechnological applications. Engineering microorganisms for production of aromatic-based biochemicals requires detailed knowledge of metabolic pathways for the degradation of aromatics that are present in lignin. Our isolation and analysis of a Rhodopseudomonas palustris strain capable of syringic acid degradation reveals a previously unknown metabolic route for aromatic degradation in R. palustris. This study highlights several key features of this pathway and sets the stage for a more complete understanding of the microbial metabolic repertoire to metabolize aromatic compounds from lignin and other renewable sources.

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