Peculiarities of ecology and distribution of unicellular soil alga Eustigmatos magnus (J.B. Petersen) Hibberd () in Southern Ural (Russia)

2008 ◽  
Vol 10 (2) ◽  
pp. 105-116 ◽  
Author(s):  
L. M. Safiulina ◽  
R. R. Kabirov
Keyword(s):  
Soil Alga

TRANSPORT OF AMINO ACIDS BY THE SOIL ALGA STICHOCOCCUS BACILLARIS

1982 ◽  
Vol 18 (4) ◽  
pp. 441-446 ◽  
Author(s):  
Richard W. Carthew ◽  
Johan A. Hellebust
Keyword(s):  
Amino Acids ◽  
Soil Alga ◽  
Stichococcus Bacillaris

CONTROL OF UNICELL FORMATION IN A SOIL SCENEDESMUS

1967 ◽  
Vol 45 (9) ◽  
pp. 1657-1664 ◽  
Author(s):  
Francis R. Trainor ◽  
Frances G. Roskosky
Keyword(s):  
Cell Surface ◽  
Tris Buffer ◽  
Standard Laboratory ◽  
Ammonium Ions ◽  
Soil Alga

Scenedesmus culture 16, a pleomorphic soil alga, produced colonies resembling S. quadricauda, S. longus, S. abundans, S. bijugatus, and S. acutiformis when grown in stationary flasks in three standard laboratory media. The unicell population was always low under such conditions.When transferred daily in several media containing ammonium ions and buffered at pH 8.5 or above, a unicell population was formed; no coenobia were present. The unicells had delicate spines randomly placed over the cell surface and resembled the genus Franceia. Co-action of other ions in the medium with the ammonium could not be demonstrated. Stored media with Tris buffer showed a steady decline in pH.

On the Influence of Light and of Glucose on the Growth of a Soil Alga

1928 ◽  
Vol os-42 (2) ◽  
pp. 317-345 ◽  
Author(s):  
B. MURIEL BRISTOL ROACH
Keyword(s):  
Soil Alga

Effects of Salt Stress on Carbohydrate Metabolism in Desert Soil Alga Microcoleus vaginatus Gom.

2006 ◽  
Vol 48 (8) ◽  
pp. 914-919 ◽  
Author(s):  
Lan-Zhou Chen ◽  
Dun-Hai Li ◽  
Li-Rong Song ◽  
Chun-Xiang Hu ◽  
Gao-Hong Wang ◽  
...  
Keyword(s):  
Salt Stress ◽  
Carbohydrate Metabolism ◽  
Desert Soil ◽  
Soil Alga ◽  
Microcoleus Vaginatus

scholarly journals Algal Lipid Bodies: Stress Induction, Purification, and Biochemical Characterization in Wild-Type and Starchless Chlamydomonas reinhardtii

2009 ◽  
Vol 8 (12) ◽  
pp. 1856-1868 ◽  
Author(s):  
Zi Teng Wang ◽  
Nico Ullrich ◽  
Sunjoo Joo ◽  
Sabine Waffenschmidt ◽  
Ursula Goodenough
Keyword(s):  
Fatty Acids ◽  
Chlamydomonas Reinhardtii ◽  
Unsaturated Fatty Acids ◽  
Biochemical Characterization ◽  
Genetic Manipulation ◽  
Lipid Bodies ◽  
Wild Type ◽  
Soil Alga ◽  
Algal Lipid ◽  
Low Levels

ABSTRACT When the unicellular green soil alga Chlamydomonas reinhardtii is deprived of nitrogen after entering stationary phase in liquid culture, the cells produce abundant cytoplasmic lipid bodies (LBs), as well as abundant starch, via a pathway that accompanies a regulated autophagy program. After 48 h of N starvation in the presence of acetate, the wild-type LB content has increased 15-fold. When starch biosynthesis is blocked in the sta6 mutant, the LB content increases 30-fold, demonstrating that genetic manipulation can enhance LB production. The use of cell wall-less strains permitted development of a rapid “popped-cell” microscopic assay to quantitate the LB content per cell and permitted gentle cell breakage and LB isolation. The highly purified LBs contain 90% triacylglycerol (TAG) and 10% free fatty acids (FFA). The fatty acids associated with the TAGs are ∼50% saturated (C16 and C18) fatty acids and ∼50% unsaturated fatty acids, half of which are in the form of oleic acid (C18:1). The FFA are ∼50% C16 and ∼50% C18. The LB-derived TAG yield from a liter of sta6 cells at 107 cells/ml after starvation for 48 h is calculated to approach 400 mg. The LB fraction also contains low levels of charged glycerolipids, with the same profile as whole-cell charged glycerolipids, that presumably form LB membranes; chloroplast-specific neutral glycerolipids (galactolipids) are absent. Very low levels of protein are also present, but all matrix-assisted laser desorption ionization-identified species are apparent contaminants. Nitrogen stress-induced LB production in C. reinhardtii has the hallmarks of a discrete pathway that should be amenable to additional genetic and culture condition manipulation.

Effect of polychlorinated biphenyl compounds on growth of Great Lakes phytoplankton

1975 ◽  
Vol 53 (7) ◽  
pp. 653-659 ◽  
Author(s):  
Valanne Glooschenko ◽  
Walter Glooschenko
Keyword(s):  
Great Lakes ◽  
Polychlorinated Biphenyl ◽  
Quality Criteria ◽  
Terrestrial Ecosystems ◽  
Industrial Applications ◽  
Cytoplasmic Vacuole ◽  
Soil Alga ◽  
Aroclor 1242 ◽  
Morphology Changes ◽  
Algal Cultures

Polychlorinated biphenyls (PCBs) have been used for a variety of industrial applications since 1929 and their presence is now widespread in aquatic and terrestrial ecosystems. In this study, three species of Great Lakes phytoplankton and one common soil alga exhibited growth inhibition when exposed to concentrations of PCB as low as 1 μg/litre while 50 μg/litre was toxic to all cultures. Photosynthesis, measured by Na214CO3 uptake was also depressed by PCB additions, but 14C uptake per cell was stimulated at times. Of the four PCB compounds tested, Aroclor 1016 appeared least toxic and Aroclor 1242 was the most toxic, while Aroclors 1221 and 1248 gave intermediate responses.Examination of cells by electron microscopy showed distortion of chloroplast lamellae and increased cytoplasmic vacuole formation in algal cultures treated with 50 μg/litre PCB. Gross cell morphology changes were also observed under the light microscope.Water quality criteria recommend that persistent organic chemicals which are toxic in concentrations of 5 μg/litre or less should not exceed environmental levels of more than 1/100th of this amount. Levels of PCBs in water from several areas of Lakes Erie and Ontario currently exceed these concentrations.

scholarly journals Growth, fatty, and amino acid profiles of the soil alga Vischeria sp. E71.10 (Eustigmatophyceae) under different cultivation conditions

2020 ◽  
Vol 65 (6) ◽  
pp. 1017-1023 ◽  
Author(s):  
Daniel Remias ◽  
Cecilia Nicoletti ◽  
Klaus Krennhuber ◽  
Bettina Möderndorfer ◽  
Linda Nedbalová ◽  
...  
Keyword(s):  
Amino Acids ◽  
Fatty Acid ◽  
Abiotic Factors ◽  
Fatty Acid Content ◽  
Dry Mass ◽  
Culture Conditions ◽  
Free Medium ◽  
Soil Alga ◽  
Its1 Rdna ◽  
Amino Acid Profiles

AbstractIn this study, a unicellular soil alga isolated from farmland in Germany was surveyed. The investigation of the hypervariable molecular markers ITS1 rDNA and ITS2 rDNA identified strain E71.10 as conspecific with Vischeria sp. SAG 51.91 (Eustigmatophyceae). The culture was tested for biomass generation and for the yield of fatty acids and amino acids. The survey included four different culture conditions (conventional, elevated CO2, nitrogen depletion, or sodium chloride stress) at room temperature. The best yield of dry biomass was achieved applying 1% CO2, whereas nitrogen-free medium resulted into least growth. The fatty acid content peaked in nitrogen-free medium at 59% per dry mass. Eicosapentaenoic acid was the most abundant fatty acid in all treatments (except for nitrogen free), accounting for 10.44 to 16.72 g/100 g dry mass. The highest content of amino acids (20%) was achieved under conventional conditions. The results show that abiotic factors strongly influence to which extent metabolites are intracellularly stored and they confirm also for this yet undescribed strain of Vischeria that Eustigmatophyceae are promising candidates for biotechnology.

Sign in / Sign up

Export Citation Format

Share Document