Prochlorothrix

Generic name: PROCHLOROTHRIX Burger-Wiersma, Stall et Mur, 1989

Synonyms:

Diagnosis:
Etymology:

Castenholz (2001): Pro' chlor, o.thrix. Gr. pref. protos first (primordial); Gr. adj. chloros green; Gr. n. thrix hair or thread; M.L. fern. n. Prochlorothrix primordial green hair.

Type species: Prochlorothrix hollandica Burger-Wiersma, Stall et Mur, 1989

Descriptions:
Castenholz (2001): Prochlorothrix is a filamentous organism that divides exclusively by binary fission in one plane and has slight to prominent constrictions at the cross-walls. Cells are longer (3-10 μm) than broad (0.5-1.5 μm in diameter). However, under salt stress (i.e., 25 mM NaCl) cells may
enlarge to reach 15 μm in length and 3 μm in width. Thylakoids arranged in layers parallel to the long axis at the periphery of the cytoplasm. Phycobilisomes absent. Motility absent; polar gas vacuoles present; sheaths absent or poorly developed; apical cells undifferentiated (rounded). LacksN2-fixing ability. Phycobiliproteins (i.e., CPE, C-PC,
and APC) absent; chlorophyll a and chlorophyll b present. Zeaxanthin and β-carotene are the major carotenoids.

Genotype differences, molecular data:

Reproduction strategies, life cycles, cell division:

Ultrastructure:

Taxonomic position, higher hierarchy:
Synechococcophycideae,Pseudanabaenales, Pseudanabaenaceae

Ecology, ecophysiology, ecological
significance:

Physiology and biochemistry:
Castenholz (2001): Isolation by micromanipulation (Castenholz, 1988a); FPG medium (see Burger-Wiersma et al., 1989) or BG-llo containing 2 mM NaNOs (Schyns et al., 1997). Optimal growth temperature 20-30°C; pH optimum 8.4.

Distribution, endemism, problematic citations:

Reference strain:
PCC 9006 (CCAP 1490/1)

Infrageneric scheme, species concept:

List of species:
Prochlorothrix hollandica Burger-Wiersma, Stall et Mur, 1989

Keys:

List of stains:

Drawings:

Application technology:

Literature:

	2.1 taxonomy: Burger-Wiersma, Stall & Mur 1989, Urbach et al. 1992
	2.2 cytomorphology:
	2.3 16S rRNA sequencing: Urbach et al. 1992, Wilmotte & Herdman 2001
	2.4 biology and life cycles: Castenholz 1988, Schyns et al. 1997
	2.5 ecology:

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