Planktotalea frisia is a species of Gram-negative, aerobic, motile, rod-shaped bacteria belonging to the phylum Proteobacteria, class Gammaproteobacteria. It is the type species of the genus Planktotalea and the family Planktotaleaceae, which were both first described in 2011 by Gärdes and colleagues.
Discovery and Etymology: The species was isolated from a surface water sample collected in the Wadden Sea (North Sea) near the German island of Sylt. The genus name Planktotalea is derived from the Greek "planktos" (wandering, plankton) and the Latin "talea" (rod), referring to its rod-like morphology and planktonic habitat. The specific epithet frisia is Latin for "Frisia," referencing the Frisian Islands where it was discovered.
Characteristics: Planktotalea frisia exhibits several distinctive characteristics:
- Morphology: Cells are typically rod-shaped, non-spore-forming, and motile by means of flagella.
- Gram Stain: Gram-negative.
- Metabolism: Obligately aerobic, meaning it requires oxygen for respiration.
- Pigmentation: Colonies are described as yellowish due to the production of carotenoid pigments.
- Growth Conditions: It is a marine bacterium, requiring sodium chloride (NaCl) for growth. Optimal growth occurs at temperatures between 20–25 °C and a pH range of 7.0–8.0. It can tolerate temperatures from 4–30 °C and a pH from 6.0–9.0.
Ecological Role: As a marine bacterium, Planktotalea frisia is presumed to play a role in nutrient cycling and organic matter decomposition within its specific North Sea planktonic environment, contributing to the complex microbial ecosystems of coastal waters.