Scenedesmus regularis SVIR. (Chlorophyta, Chlorophyceae), its taxonomy and salt stress response
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Abstract
Scenedesmus regularis SVIR., is a well-defined species. Its ecology and salt-influenced cell shape was compared with that of S. pectinatus MEYEN, which is clearly distinguishable. Both species grow best at low concentration of NaCI and they also only develop their typical cell shapes at a low NaCI concentration. At higher NaCI concentration both species have reduced growth and S. regularis resembles S. incrassatulus BOHL., while the strains of S. pectinatus develop to some degree a S. regularis-like cell shape. Eight-celled coenobia are reported for the first time for S. regularis and these have irregularly arranged cells. Under the SEM both species show longitudinal ridges. The species is reported as new for Yugoslavia, South Africa, Dominica and the USA.