Results 161 to 170 of about 6,552 (222)

Sterols of mediterranean chlorophyceae

Experientia, 1980
The distribution of sterols in 8 Mediterranean green algae has been investigated. C29 sterols are the major group in the species examined. 28-Isofucosterol seems to be typical for Ulotrichales, and the rare clerosterol for the genus Codium.
E. Fattorusso, S. Magno, L. Mayol
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DEGRADATIVE DISEASE IN ULVA RIGIDA (CHLOROPHYCEAE) ASSOCIATED WITH ACROCHAETE GENICULATA (CHLOROPHYCEAE)

Journal of Phycology, 1998
A destructive disease affecting tank‐cultivated Ulva rigida C. Agardh. was characterized by green spots, initially located at the base of the thalli, that spread through the host thallus and gradually caused perforations of the frond. The endophytic filamentous green alga Acrochaete geniculata (Gardner) O’Kelly was identified as the causative agent of ...
del Campo, E, Garcia-Blairsy Reina, Guillermo, Correa, JA   +2 more
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The taxonomy ofUlva(Chlorophyceae) in the Netherlands

British Phycological Journal, 1981
On the basis of 160 living samples from 26 different stations five Ulva species were distinguished, and described for the Netherlands coast, namely U. pseudocurvata nov. spec., U. curvata (Kutz.) De Toni, U. lactuca L., U. rigida C.Ag. and U. scandinavica Bliding.
Koeman, R.P.T., van den Hoek, Christiaan
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Physiological characteristics of Trebouxia (Chlorophyceae, Chlorococcales) and Pseudotrebouxia (Chlorophyceae, Chlorosarcinales)

Phycologia, 1977
Abstract The phycobionts of Trebouxia (Chlorococcales) and of Pseudotrebouxia (Chlorosarcinales) grow well on 1·5–1·0% agarized Bold's Basal Medium. Vitamins are not necessary for maintaining growth. Glucose enhances growth in liquid medium. Utilization of inorganic and organic sources of nitrogen varies between genera and among Isolates of the same ...
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The ultrastructure of Helicodictyon planctonicum (Chlorophyceae)

Phycologia, 1983
Abstract Helicodictyon planctonicum (Whitford) Whitford & Schumacher (Chlorophyta) is a rare freshwater alga usually assigned to the order Chaetophorales but also reported to show features resembling members of the order Chlorococcales. In order to help clarify its phylogenetic position, an ultra-structural study was performed.
Nancy K. Webster-Smith, George B. Chapman, Philip Sze   +2 more
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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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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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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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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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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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