Results 121 to 130 of about 2,021 (158)

Phytosterol biosynthesis and production by diatoms (Bacillariophyceae)

Phytochemistry, 2019
Diatoms are abundant unicellular marine photosynthetic algae that have genetically diversified their physiology and metabolism while adapting to numerous environments. The metabolic repertoire of diatoms presents opportunities to characterise the biosynthesis and production of new and potentially valuable microalgal compounds, including sterols ...
Ana Cristina, Jaramillo-Madrid, Justin, Ashworth, Michele, Fabris, Peter J, Ralph   +3 more
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Pedogamy in Neidium (Bacillariophyceae)

Folia Microbiologica, 2008
Single (unpaired) vegetative cells of freshwater pennate diatom Neidium cf. ampliatum differentiated into gametangia and produced a single zygote (auxospore) via a pedogamic process. The gametic nuclei fused after auxospore expansion had begun. The auxospore expanded in parallel to the apical axis of the gametangium.
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Pseudostephanodiscus gen. n. (Bacillariophyceae)

Archiv für Protistenkunde, 1988
Summary The new genus differs from the genus Stephanodiscus in having in the external layer of the valve irregularly disposed rough chinks instead of radially arranged files of areoles, and a narrow dentate frill on the abvalvar mantle edge of the valve. The only species Pseudostephanodiscus perforatus ( Genk. et Kuzm. ) Siem.
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Morphogenetic processes inAttheya decora (Bacillariophyceae, Biddulphiineae)

Plant Systematics and Evolution, 1980
The valva of the diatomAttheya decora is formed within a silica deposition vesicle which enlarges centrifugally by the fusion of small vesicles. The silica deposition vesicle can already be seen when the spindle has not yet disappeared completely. Valva formation seems to begin with the shaping of an organic matrix within a silica deposition vesicle ...
E. Schnepf, G. Deichgr�ber, G. Drebes
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?? ?????????? Bacillariophyceae ?????????????????? ???????????????? ???????? ?????????????????? ???????? (????????????)

2014
???????????? ?????????????????? ?????? ???????????????????? ?????????????????? ???????????? ?????? ??????, ???????????? 06-1-??11-036.
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Carotenoid Distribution Patterns in Bacillariophyceae (Diatoms)

Biochemical Systematics and Ecology, 1988
The distribution of carotenoids in 10 species of diatoms was determined qualitatively and quantitatively. Monoacetylenic carotenoids (diatoxanthin and diadinoxanthin, 12–43% of total), allenic carotenoids (fucoxanthin and fucoxanthinol, 49–81% of total), monoepoxides (diadinoxanthin, fucoxanthin and fucoxanthinol, 79–91% of total) and β,β-carotene (3–8%
Frank Pennington, Robert R.L. Guillard, Synnøve Liaaen-Jensen   +2 more
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Cladistic analysis of plicated Thalassiosira (Bacillariophyceae)

Phycologia, 2001
Abstract Nineteen Thalassiosira species informally referred to as the plicated Thalassiosira were examined in a cladistic analysis. The species range in age from 17 Ma to modern, representing the earliest known members of the group and its most recent members.
Matthew L. Julius, Yoshihiro Tanimura
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Four new European Achnanthidium species (Bacillariophyceae)

Algological Studies, 2011
Four new Achnanthidium species belonging to the species complex around A. minutissimum (Kutz.) Czarn. are described from different localities in Europe. Achnanthidium hoffmannii Van de VijVer, eCtor, a. Mertens et jarlMan nov. spec. was found in several oligotrophic, circumneutral rivers in Sweden.
Bart Van de Vijver, Amelie Jarlman, Horst Lange-Bertalot, Adrienne Mertens, Myriam de Haan, Luc Ector   +5 more
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The Achnanthidium minutissimum complex (Bacillariophyceae) in southern Poland

Algological Studies, 2011
Representatives of the Achnanthidium minutissimum (Kutz.) Czarn. complex are common and widespread diatoms in Poland. The following species were included in this study: Achnanthidium affine (Grunow) Czarn., A. caledonicum (LanGe-Bert.) LanGeBert., A. eutrophilum (LanGe-Bert.) LanGe-Bert., A. exile (Kutz.) HeiB., A. jackii raBenH., A. lineare w.
Wojtal, A.Z., Ector, L., Van de Vijver, Bart, Morales, E.A., Blanco, S., Piatek, J., Smieja, A.   +6 more
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A comparative study of Reimeria species (Bacillariophyceae)

Nova Hedwigia, 2010
Abstract: A study of five Reimeria taxa was performed based on light microscopy (LM) and scanning electron microscopy (SEM). The new species Reimeria fontinalis Levkov sp. nov. from Lake Ohrid (Macedonia) was compared to similar taxa, R. sinuata (W.Gregory) Kociolek & Stoermer and R. ovata (Hustedt) Levkov & Ector stat. nov.
Zlatko Levkov, Luc Ector
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