Summary
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1.
Zoosporogenesis and zoospore structure of Lagenidium callinectes, parasitic on ova of the blue crab, Callinectes sapidus, are studied by electron microscopy.
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2.
The cytoplasmic thread connecting discharging cytoplasmic units appears as a simple constricted area of cytoplasm, containing much membranous material, and bound by only the plasma membrane.
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3.
Cleavage of discharged cytoplasm may be grouped into four stages and occurs by the coalescence of cleavage vacuoles.
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4.
During cleavage, microtubules contained within packets formed from the endoplasmic reticulum attach extracellularly to the anterior flagellum.
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The zoospores are rather “unspecialized” with the two flagella arising from a raised area of the diagonal groove.
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6.
Rootlets interconnect the basal bodies and project anteriorly and posteriorly along the plasma membrane of the spore.
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7.
Microtubules project away from the basal bodies and appear to ensheath the beaked nucleus.
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Portions of this report appeared in a thesis submitted by H. V. Amerson to East Carolina University in partial fulfillment of the requirements for the M. A. degree in Biology.
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Bland, C.E., Amerson, H.V. Electron microscopy of zoosporogenesis in the marine phycomycete, Lagenidium callinectes Couch. Archiv. Mikrobiol. 94, 47–64 (1973). https://doi.org/10.1007/BF00414077
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DOI: https://doi.org/10.1007/BF00414077