Results 121 to 130 of about 2,947 (173)

SOME CHLOROPHYCEAE FROM CUBAN SOILS

American Journal of Botany, 1958
THE OCCURRENCE of numerous spherical zoosporeproducing chlo,rophycean organisms in soil, the distinctive morphological attributes of which are not immediately apparent upon inspection, has resulted in the description of many species imperfectly circumscribed.
Gina Arce, Harold C. Bold
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Polymorphism in gloeotaenium (Chlorococcales, Chlorophyceae)

Hydrobiologia, 1981
Morphological variations of Gloeotaenium loitlesbergarianum Hansgirg were studied both in cultures and in nature. In cultures, the alga exhibits considerable variation in the number of cells per colony, ranging from unicells to colonies with more than four cells. The characteristic band was also absent in cultures.
P. V. Devi Prasad, Y. B. K. Chowdary
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Trebouxia de Pulmaly (Chlorophyceae, Chlorococcales) and Pseudotrebouxia gen. nov. (Chlorophyceae, Chlorosarcinales)

Phycologia, 1975
Isolates listed as Trebouxia in the various culture collections throughout the world were obtained and cultured on an inorganically enriched, agarized medium under standard conditions of light and ...
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Conditional senescence in Chlamydomonas reinhardtii (Chlorophyceae)

Journal of Phycology, 2013
The mechanisms of microalgal senescence may play an important role in nutrient recycling and enhanced survival. However, the aging physiology of microalgae is an understudied phenomenon. To investigate the patterns of conditional senescence in Chlamydomonas reinhardtii P. A. Dangeard, we used a cell wall‐less strain, transformed with a reporter gene to
Penny L, Humby, Ellen C R, Snyder, Dion G, Durnford   +2 more
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Pleomorphism inScenedesmus quadricauda (Turp) Bréb. (Chlorophyceae)

Hydrobiological Bulletin, 1976
A clone ofScenedesmus quadricauda, isolated from Tjeukemeer, exhibits a high degree of morphological variation in synchronized cultures. Cells are synchronized by light-dark cycles. During the photoperiod they build up the capacity to divide. First division into 2- and 4-celled coenobia is induced, then during the second half of the photoperiod the ...
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PYRENOID ULTRASTRUCTURE IN ULOTHRIX (CHLOROPHYCEAE)

Acta Botanica Neerlandica, 1980
SUMMARY The ultrastructure of the pyrenoid in the gametophytic phase of the species of Ulothrix shows a large diversity. This was revealed by a study of the morphology of the pyrenoid matrix, the associated starch cap and the pattern of the intrapyrenoidal chloroplast strands. From these features, eight types of pyrenoid structure were recognized in
G. M. Lokhorst, W. Star
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Die GattungPodohedra (Chlorophyceae, Chlorococcales)

�sterreichische Botanische Zeitschrift, 1965
Die GattungPodohedra umfast mindestens vier Arten,P. distincta wird neu beschrieben, die Diagnosen der anderen Arten werden erganzt. Die taxonomischen Merkmale wurden an Kulturen uberpruft. Der Bau des Pyrenoids bietet ein brauchbares zusatzliches diagnostisches Merkmal.
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An ultrastructural comparison betweenSpermatozopsis andDunaliella (Chlorophyceae)

Plant Systematics and Evolution, 1984
The ultrastructure of the type species of the genusDunaliella, D. salina, has been reinvestigated in an attempt to clarify the relationships betweenDunaliella andSpermatozopsis. Dunaliella salina differs in the following ultrastructural characters fromSpermatozopsis (as exemplified byS.
Michael Melkonian, Hans Rudolf Preisig
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Zwei neue Sippen vonScotiella (Chlorophyceae)

�sterreichische Botanische Zeitschrift, 1964
Scotiella tuberculata var.verrucosa n. var. undScotiella spinosa n. sp. leben aerophytisch auf verwittertem Holz und befinden sich wahrend des Sommers im Dauerzellzustand; ihre aktive Lebenstatigkeit entfalten sie vermutlich wahrend der Schneeschmelze im Fruhjahr.
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ADAPTATION OF SELENASTRUM CAPRICORNUTUM (CHLOROPHYCEAE) TO COPPER

Environmental Toxicology and Chemistry, 1986
Abstract Selenastrum capricornutum Printz, growing in a chemically defined medium, was used as a model for studying adaptation of algae to a toxic metal (copper) ion. Cells exhibited lag-phase adaptation to 0.8 μM total Cu (10−12 M free ion concentration) after 20 generations of Cu exposure.
J.S. Kuwabara, H.V. Leland
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