Spine Patterns in Several Clones of a Scenedesmus

Abstract
Scenedesmus culture N 56 was able to produce several coenobial types in culture. Seventeen clones were established from the parent strain; individual coenobial types were examined under the microscope, diagrammed, and them isolated. Wall ornamentation was then studied in all these Scenedesmus cultures. Clones were studied in duplicate flasks in standard laboratory media for one month. Variability in distribution of wall ornamentation was noted in all cases; no clone proved to be a "stable" culture. These observations were confirmed in studies of coenobia incubated in sterile vessels in nature.

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