Sorogena stoianovitchae Bradbury and Olive (ATCC® 50031)

Strain Designations: PNG 76-73  /  Depositor: RL Blanton  /  Biosafety Level: 1

Permits and Restrictions

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Strain Designations PNG 76-73
Contact Sales for a recommended strain of Colpoda sp.
Biosafety Level 1
Isolation Old aborted fruits and stalks of Ficus botryocarpa, Papua New Guinea, 1976
Product Format test tube
Storage Conditions Frozen: -70°C or colder
Freeze-Dried: 2°C to 8°C
Live Culture: See Protocols Section
Type Strain no
Contact Sales for a recommended strain of Colpoda sp. to be purchased with ATCC® 50031™.
Morphology, morphogenesis and systematic position
The structure and composition of stalk
Ultrastructure of aerial stalk formation
Medium Medium 1330: Sorogena medium
Growth Conditions
Temperature: 20°C to 25°C
Cryopreservation Reagents
Cryoprotective Solution
DMSO, 1.5 mL
Fresh growth medium w/o bacteria, 8.5 mL

Harvest and Preservation
  1. Mix the components in the order listed. When the medium is added to the DMSO the solution will warm up due to chemical heat.
  2. Harvest Sorogena and Colpoda cysts from a culture that has recently passed peak density by centrifugation at 1000 x g for 5 min.
  3. Adjust the concentration of cells to at least 2 x 104/mL in fresh medium.
  4. Mix the cell preparation and the cryoprotective solution in equal portions by adding the cryoprotective solution to the cell suspension in 3 equal aliquots at 2 min. intervals.
  5. Dispense in 0.5 mL aliquots into 1.0 - 2.0 mL sterile plastic screw-capped cryules (special plastic vials for cryopreservation).
  6. Place vials in a controlled rate freezing unit. From room temperature cool at -1°C/min to -40°C. If freezing unit can compensate for the heat of fusion, maintain rate at -1°C/min through heat of fusion. At -40°C plunge ampules into liquid nitrogen. Alternatively, place the vials in a Nalgene 1°C freezing apparatus.  Place the apparatus at -80°C for 1.5 to 2 hours and then plunge ampules into liquid nitrogen.  (The cooling rate in this apparatus is approximately -1°C/min.)  
  7. Ampules are stored in either the vapor or liquid phase of a nitrogen refrigerator.
  8. To establish a culture from the frozen state place the vial in a 35°C water bath. Immerse the vial to a level just above the surface of the frozen material. Do not agitate the vial. Immediately after thawing, do not leave in water bath, aseptically remove the contents of the ampule and transfer to a petri plate or T-25 tissue culture flask containing a bed of agar medium and 10-15 mL total liquid overlay (ATCC medium 1330).
  9. Optionally, aseptically transfer 0.2-0.5 mL from a growing culture of Colpoda sp. to the petri plate or T-25 flask (See section on Culture Maintenance).
  10. Incubate the culture at 20-25°C under a 14 hour light (~50 µEinsteins/m2/s irradiance)/10 hour dark cycle.  Active trophozoites (ciliates) of both Colpoda and Sorogena should be observed within 2-3 days.  Once the culture is established, follow the protocol for maintenance of culture.
Name of Depositor RL Blanton
Chain of Custody
ATCC <-- RL Blanton <-- LS Olive
Year of Origin 1976

Bardele CF, et al. Morphology, morphogenesis and systematic position of the sorocarp forming ciliate Sorogena stoianovitchae Bradbury & Olive, 1980. J. Protozool. 38: 7-17, 1991.

Blanton RL, et al. . J. Protozool. 30: 617-624, 1983.

Blanton RL, Olive LS. Stalk function during sorogenesis by the ciliated protozoan Sorogena stoianovitchae. Protoplasma 116: 136-144, 1983.

Blanton RL, Olive LS. Ultrastructure of aerial stalk formation by the ciliated protozoan Sorogena stoianovitchae. Protoplasma 116: 125-135, 1983.

Notice: Necessary PermitsPermits

These permits may be required for shipping this product:

  • Customers located in the state of Hawaii will need to contact the Hawaii Department of Agriculture to determine if an Import Permit is required. A copy of the permit or documentation that a permit is not required must be sent to ATCC in advance of shipment.
Basic Documentation