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Protostelium okumukumu Spiegel and Shadwick
Life   Amoebozoa   Eumycetozoa   Protosteliaceae   Protostelium


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Overview
Grows well on wMY agar (0.02 g malt extract, 0.02 g yeast extract, 0.75 g K2HPO4, and 15 g agar/L distilled water) at 20-24 C with the yeast Cryptococcus laurentii or Rhodotorula mucilaginosa as a food source. Sporocarps 15-25 µm tall with bipartite stalk. Basal portion of stalk rigid, straight 14-20 µm long. Apical portion of stalk subspherical, 2.5-3 µm in diam. Junction between stalk base and apical apex and spore born at an angle to the stalk swings back and forth in air currents. Spores, single, uninucleate, spherical (7.2) 9.5-10.5 µm in diam. Spores forcefully discharged with spore and apical swelling disappearing from the stalk base which remains standing. Spores germinating as uninucleate, nonflagellated amoebae typical of the genus Protostelium, sensu Spiegel et al (1994). Amoebae containing light orange lipid droplets Prespore cells lozenge-shaped (ellipsoid). Amoebae may reversibly encyst producing walled, spherical cysts of same size as spores.

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Acknowledgements
The Eumycetozoan Project -- working to understand the ecology, sytematics and evolution of myxomycetes, dictostelids and protostelids -- the true slime molds.

Sponsored by grants from the National Science Foundation.


Feedback
Please send any corrections and comments about this page to John Shadwick
Department of Biological Sciences, University of Arkansas, Fayetteville, AR 72701, USA
email: jshadwi@uark.edu
phone: USA-479-575-7393.


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Updated: 2024-03-28 13:32:05 gmt
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