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PHYLOGENY OF THE CONJUGATING GREEN ALGAE (ZYGNEMOPHYCEAE) BASED ON rbc  L SEQUENCES
Sequences of the gene encoding the large subunit of RUBISCO (rbcL) for 30 genera in the six currently recognized families of conjugating green algae (Desmidiaceae, Gonatozygaceae, Mesotaeniaceae,Expand
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A POLYPLOID SPECIES COMPLEX OF SPIROGYRA COMMUNIS (CHLOROPHYTA) OCCURRING IN NATURE 1
Investigations were conducted to determine whether ploidal changes found in laboratory cultures of Spirogyra also occur in nature. In an earlier study filament types identifiable as three differentExpand
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ENVIRONMENTAL FACTORS AFFECTING RESISTANCE TO DESICCATION IN THE DIATOM STAURONEIS ANCEPS
Several environmental parameters influence the ability of Stauroneis anceps Ehr. to survive periods of dehydration to equilibrium with atmospheric humidity. Cells grown in soil-water are better ableExpand
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DISTRIBUTION, MORPHOLOGICAL DIVERSITY AND EVIDENCE FOR POLYPLOIDY IN NORTH AMERICAN ZYGNEMATACEAE (CHLOROPHYTA) 1
Large‐scale collections of Zygnemataceae in the continental United States of America were made between March and August in 1982, 1983, and 1984. Collections were made on a 31000‐km transect throughExpand
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Advanced anisogamy in Chlamydomonas monadina (Chlorophyceae) with special reference to vacuolar activity during sexuality
Abstract A homothallic strain of Chlamydomonas monadina Stein, UTEX 760, produced cells of three sizes. The largest were always vegetative while the middle size and smallest cells could act asExpand
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Interpretation of zygospore wall structure and taxonomy of Spirogyra and Sirogonium (Zygnemataceae, chlorophyta)
Abstract Because of the importance of zygospore wall ultrastructure in identification of zygnematacean algae, chemical and enzymatic preparatory methods for scanning electron microscopy (SEM) wereExpand
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Diversity of Spirogyra (Chlorophyta) filament types on an altitudinal gradient
A seasonal survey of Spirogyra strains in an intermittent stream in southern Arizona, USA, was conducted from spring 1981 to winter 1982. The diversity and distribution of six morphologicallyExpand
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CULTIVATION OF A FILAMENTOUS ALGA IN QUANTITY ON AGAR PLATES 1, 2
A method for the cultivation of Zygnema in quantity on agar plates is described. Axenic filaments were chopped with razor blades, and 4 ml of the suspension of short filaments in nutrient medium wereExpand
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