Nisaea (genus)
Encyclopedia
Nisaea is a genus in the phylum Proteobacteria
Proteobacteria
The Proteobacteria are a major group of bacteria. They include a wide variety of pathogens, such as Escherichia, Salmonella, Vibrio, Helicobacter, and many other notable genera....

 (Bacteria
Bacteria
Bacteria are a large domain of prokaryotic microorganisms. Typically a few micrometres in length, bacteria have a wide range of shapes, ranging from spheres to rods and spirals...

), which contains two species, namely N. denitrificans and N. nitritireducens, which were described in 2008.

Description

Like all Proteobacteria the two species stain Gram-negative
Gram-negative
Gram-negative bacteria are bacteria that do not retain crystal violet dye in the Gram staining protocol. In a Gram stain test, a counterstain is added after the crystal violet, coloring all Gram-negative bacteria with a red or pink color...

. They were isolated from coastal, surface waters of the north-western Mediterranean Sea
Mediterranean Sea
The Mediterranean Sea is a sea connected to the Atlantic Ocean surrounded by the Mediterranean region and almost completely enclosed by land: on the north by Anatolia and Europe, on the south by North Africa, and on the east by the Levant...

, specifically on February 2004 at the SOLA station located in the bay of Banyuls-sur-Mer
Banyuls-sur-Mer
Banyuls-sur-Mer is a commune in the Pyrénées-Orientales department in southern France.-Geography:Banyuls-sur-Mer is neighbored by Cerbère, Port-Vendres, Argelès-sur-Mer and Collioure. The region is known for its wines, such as the sweet wine Banyuls. An aquatic museum with aquarium is located in...

 (42 2.99 N 3 0.89 E) at a depth of 3 metres.
The cells are motile pleomorphic rods that are 2.9 μm long and 0.9 μm wide. When grown on marine agar medium, they form cream colonies (i.e. no pigmentation). Apart from standard genetic differences for species (98% 16S, 55% DNA-DNA), the two species differ in that Nisaea denitrificans can fully denitrify whereas Nisaea nitritireducens cannot only reduce nitrite.

Etymology

The name Nisaea derives from:
Latin
Latin
Latin is an Italic language originally spoken in Latium and Ancient Rome. It, along with most European languages, is a descendant of the ancient Proto-Indo-European language. Although it is considered a dead language, a number of scholars and members of the Christian clergy speak it fluently, and...

 feminine gender
Grammatical gender
Grammatical gender is defined linguistically as a system of classes of nouns which trigger specific types of inflections in associated words, such as adjectives, verbs and others. For a system of noun classes to be a gender system, every noun must belong to one of the classes and there should be...

 noun Nisaea, nymph of the sea, referring to the marine origin (Mediterranean sea). Nicaea
Nicaea (mythology)
In Greek mythology, Nicaea was a nymph , the daughter of the river-god Sangarius and Cybele. She was beloved by a shepherd, Hymnus, and killed him, but Eros took vengeance upon her, and Dionysus, who first intoxicated her, made her mother of Telete, whereupon she attempted to hang herself; yet she...

 is in fact a sea nymph and daughter of the river-god Sangarius
Sangarius
The genus Sangarius is in the shield bug family Acanthosomatidae....

 and Cybele
Cybele
Cybele , was a Phrygian form of the Earth Mother or Great Mother. As with Greek Gaia , her Minoan equivalent Rhea and some aspects of Demeter, Cybele embodies the fertile Earth...

.
Whereas the specific epithets, refer to:
  • denitrificans: New Latin
    New Latin
    The term New Latin, or Neo-Latin, is used to describe the Latin language used in original works created between c. 1500 and c. 1900. Among other uses, Latin during this period was employed in scholarly and scientific publications...

     participle adjective denitrificans (from New Latin
    New Latin
    The term New Latin, or Neo-Latin, is used to describe the Latin language used in original works created between c. 1500 and c. 1900. Among other uses, Latin during this period was employed in scholarly and scientific publications...

     v. denitrifico), denitrifying.
  • nitritireducens: New Latin
    New Latin
    The term New Latin, or Neo-Latin, is used to describe the Latin language used in original works created between c. 1500 and c. 1900. Among other uses, Latin during this period was employed in scholarly and scientific publications...

     noun nitris -itis, nitrite; Latin
    Latin
    Latin is an Italic language originally spoken in Latium and Ancient Rome. It, along with most European languages, is a descendant of the ancient Proto-Indo-European language. Although it is considered a dead language, a number of scholars and members of the Christian clergy speak it fluently, and...

     participle adjective reducens, leading back, bringing back and (in chemistry) converting to a different oxidation state; New Latin
    New Latin
    The term New Latin, or Neo-Latin, is used to describe the Latin language used in original works created between c. 1500 and c. 1900. Among other uses, Latin during this period was employed in scholarly and scientific publications...

    participle adjective nitritireducens, reducing nitrite.
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