Temat: alga - Prolib Integro

Skocz do pozycji: 1.

Tytuł:: Density dependent growth of the red algae Furcellaria lumbricalis and Coccotylus trancatus in the West Estonian Archipelago Sea, Northern Baltic Sea
Autorzy:: Kotta, J.
Paalme, T.
Kersen, P.
Martin, G.
Herkul, K.
Moller, T.
Tematy:: Baltic Sea
Furcellaria lumbricalis
red alga
alga growth
Coccotylus truncatus; Pokaż więcej
Wydawca:: Polska Akademia Nauk. Instytut Oceanologii PAN
Powiązania:: https://bibliotekanauki.pl/articles/48839.pdf Link otwiera się w nowym oknie
Opis:: In an in situ experiment we evaluated the growth of the red algae Furcellaria lumbricalis and Coccotylus truncatus in the Archipelago Sea. The results showed that the growth rates of both species were similar but that growth decreased with increasing algal coverage. The effects were more pronounced for C. truncatus than for F. lumbricalis. Economic analyses aiming to establish sustainable harvesting limits for F. lumbricalis in the study area should take account of the density dependent growth of these red algae.
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 2.

Tytuł:: Helicosporidia: a genomic snapshot of an early transition to parasitism
Autorzy:: Sun, Y.
Pombert, J.-F.
Tematy:: Helicosporidium
green alga
alga
comparative genomics
entomopathogen
parasitism
parasite
invertebrate; Pokaż więcej
Wydawca:: Polskie Towarzystwo Botaniczne
Powiązania:: https://bibliotekanauki.pl/articles/58197.pdf Link otwiera się w nowym oknie
Opis:: Helicosporidia are gut parasites of invertebrates. These achlorophyllous, non-photosynthetic green algae are the first reported to infect insects. Helicosporidia are members of the green algal class Trebouxiophyceae and are further related to the photosynthetic and non-photosynthetic genera Auxenochlorella and Prototheca, respectively, the latter of which can also turn to parasitism under opportunistic conditions. Molecular analyses suggest that Helicosporidia diverged from other photosynthetic trebouxiophytes less than 200 million years ago and that its adaptation to parasitism is therefore recent. In this minireview, we summarize the current knowledge of helicosporidian genomics. Unlike many well-known parasitic lineages, the Helicosporidium sp. organelle and nuclear genomes have lost surprisingly little in terms of coding content aside from photosynthesis-related genes. While the small size of its nuclear genome compared to other sequenced trebouxiophycean representatives suggests that Helicosporidium is going through a streamlining process, this scenario cannot be ascertained at this stage. Genome expansions and contractions have occurred independently multiple times in the green algae, and the small size of the Helicosporidium genome may reflect a lack of expansion from a lean ancestor state rather than a tendency towards reduction.
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 3.

Tytuł:: Hildenbrandia rivularis [Rhodophyta] in Central Poland
Autorzy:: Zelazna-Wieczorek, J
Ziulkiewicz, M.
Tematy:: hydrochemical condition
red alga
Central Poland
Hildenbrandia rivularis
Rhodophyta
spring
freshwater red alga; Pokaż więcej
Wydawca:: Polskie Towarzystwo Botaniczne
Powiązania:: https://bibliotekanauki.pl/articles/56624.pdf Link otwiera się w nowym oknie
Opis:: Freshwater red algae Hildenbrandia rivularis has been noted for the first time in central Poland near the Lodz agglomeration. Until now, this alga was recorded only in mountain and Polish Lowland areas. The wide range of habitat conditions influencing the occurrence for this protected species has been determined in the spring niche. The possible threat to habitat where H. rivularis occurs, is connected with construction and exploitation of the A2 highway
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 4.

Tytuł:: Photosynthetic activity of acidophilic red alga Cyanidioschyzon merolae under various light intensity and quality during growth
Autorzy:: Baclawska, I.
Parys, E.
Krupnik, T.
Kargul, J.
Romanowska, E.
Tematy:: conference
photosynthetic activity
red alga
Cyanidioschyzon merolae
eukaryotic alga
chloroplast
mitochondrion
photosystem
thylakoid; Pokaż więcej
Wydawca:: Polska Akademia Nauk. Czytelnia Czasopism PAN
Powiązania:: https://bibliotekanauki.pl/articles/80774.pdf Link otwiera się w nowym oknie
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 5.

Tytuł:: Chlorophyll fluorimetry as a method for studying light absorption by photosynthetic pigments in marine algae
Autorzy:: Matorin, D.N.
Antal, T.K.
Ostrowska, M.
Rubin, A.B.
Ficek, D.
Majchrowski, R.
Tematy:: alga
chlorophyll a concentration
photosynthetic pigment
fluorescence
marine alga
phytoplankton
light absorption
chlorophyll fluorimenty; Pokaż więcej
Wydawca:: Polska Akademia Nauk. Instytut Oceanologii PAN
Powiązania:: https://bibliotekanauki.pl/articles/48459.pdf Link otwiera się w nowym oknie
Opis:: Using laboratory cultures of algae and natural phytoplankton populations from Nhatrang Bay (South China Sea), the relationship between the chlorophyll fluorescence F0, the chlorophyll a concentration Ca and light absorption capacities of algae cells was studied. It is shown that the ratio F0/Ca depends mainly on the species composition of the algae population; hence, the concentration Ca can be measured with the fluorescence method with acceptable accuracy only when the species composition of algae populations varies over a rather narrow range. The fluorescence F0 can, however, be a good index of the total absorption capacities of different phytoplankton species, because the intensity of F0 depends on the sum total of light absorbed by all photosynthetic pigments in a plant cell. Thus, the fluorescence F0 measures not only the concentration of chlorophyll a, but that of all photosynthetic pigment concentrations.
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 6.

Tytuł:: Seasonal dynamics of phytoplankton in the inner Neva Estuary in the 1980s and 1990s
Autorzy:: Nikulina, V.N.
Tematy:: species composition
biomass
Neva River
alga
blue-green alga
Oscillatoria
phytoplankton
Neva Estuary
seasonal dynamics; Pokaż więcej
Wydawca:: Polska Akademia Nauk. Instytut Oceanologii PAN
Powiązania:: https://bibliotekanauki.pl/articles/47983.pdf Link otwiera się w nowym oknie
Opis:: The phytoplankton in the inner Neva Estuary is described from data obtained from 1996 to 2000.T he seasonal dynamics of the phytoplankton biomass are characterized by a bimodal curve with a summer maximum.T he average seasonal biomass was approximately 3 mg l−1, the maximum biomass was 8–11 mg l−1. The species composition and quantitative parameters were compared to those observed in the 1980s.A notable, nearly 1.5–2 fold, increase in the biomass in the summer–autumn period and the predominance of Oscillatoria species among the blue-green algae were observed.A decline in the nutrient load in the water body at the end of the 1990s appeared to be insufficient to bring about a decrease in the proportion of Oscillatoria algae in the total species composition or a decline in the biomass of the entire phytoplankton community. In 2000 a certain change in the structural composition of the phytoplankton complex was noted.S pecies that had been predominant in the 1980s and had lost their advantage in the early 1990s, regained their earlier status.
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 7.

Tytuł:: Basicladia chelonum [Collins] W.E.Hoffmann et Tilden [Chlorophyta, Cladophorophyceae] fron Cuba [Caribbean]: new observation of the ultrastructure of its vegetative cells
Autorzy:: Mrozinska, T
Czerwik-Marcinkowska, J.
Webb-Janich, M.
Tematy:: Caribbean Region
taxonomy
alga
ultrastructure
Basicladia chelonum
Cuba
Chlorophyta
green alga
vegetative cell
turtle
Cladophorophyceae; Pokaż więcej
Wydawca:: Polskie Towarzystwo Botaniczne
Powiązania:: https://bibliotekanauki.pl/articles/57776.pdf Link otwiera się w nowym oknie
Opis:: Basicladia chelonum (Collins) W.E. Hoffmann and Tilden (1930) principally known from North America and Hawaii was recently (2004) found in Cuba (Caribbean) from artificial pool growing on shells of musk turtles (Trachemys decussata Gray). Specimens collected in Cuba were subjected to detailed examinations also using a transmission electron microscope. On one hand, these studies confirmed many features of this species previously described by earlier authors in the specimens from Texas. On the other hand, the present studies revealed structures unknown so far (pyrenoid structure), which allowed for new analysis of this species. These investigations also have shown that Basicladia chelonum exhibits close similarity to the genus Cladophora and other representatives of the class Cladophorophyceae. The similarities include : siphonocladous level of organization of thallus, numerous chloroplasts forming a network and other structures. Conversely, the pyrenoid in vegetative cells of Basicladia chelonum distinguishes it markedly from representatives of the genus Cladophora, which have bilenticular pyrenoids divided into two hemispheres by a single thylakoids and each hemisphere is covered by a bowlshaped starch grain (Van Hoek et al. 1995). Since in Cladophora the ultrastructure of the pyrenoid is highly constant and characteristic, this contrasts with the genus Basicladia and, therefore, more firmly establishes position of the latter as an independent unit within Cladophorophyceae.
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 8.

Tytuł:: A contemplation on the secondary origin of green algal and plant plastids
Autorzy:: Kim, E.
Maruyama, S.
Tematy:: Archaeplastida
Chloroplastida
glaucophyte
green alga
plant plastid
plastid
primary plastid
red alga
secondary plastid
Viridiplantae; Pokaż więcej
Wydawca:: Polskie Towarzystwo Botaniczne
Powiązania:: https://bibliotekanauki.pl/articles/59379.pdf Link otwiera się w nowym oknie
Opis:: A single origin of plastids and the monophyly of three “primary” plastid-containing groups – the Chloroplastida (or Viridiplantae; green algae+land plants), Rhodophyta, and Glaucophyta – are widely accepted, mainstream hypotheses that form the basis for many comparative evolutionary studies. This “Archaeplastida” hypothesis, however, thus far has not been unambiguously confirmed by phylogenetic studies based on nucleocytoplasmic markers. In view of this as well as other lines of evidence, we suggest the testing of an alternate hypothesis that plastids of the Chloroplastida are of secondary origin. The new hypothesis is in agreement with, or perhaps better explains, existing data, including both the plastidal and nucleocytoplasmic characteristics of the Chloroplastida in comparison to those of other groups.
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 9.

Tytuł:: Epilithic algae from caves of the Krakowsko-Czestochowska Upland [Southern Poland]
Autorzy:: Czerwik-Marcinkowska, J
Mrozinska, T.
Tematy:: alga
Polska
ultrastructure
Bacillariophyceae
Chrysophyta
epilithic species
Chlorophyta
Xanthophyceae
Eustigmatophyceae
Dinophyta
epilithic alga
Krakow-Czestochowa Upland
cave; Pokaż więcej
Wydawca:: Polskie Towarzystwo Botaniczne
Powiązania:: https://bibliotekanauki.pl/articles/57809.pdf Link otwiera się w nowym oknie
Opis:: This paper describes the first study of algae assemblages in 20 caves in the Krakowsko-Częstochowska Upland (Southern Poland), in the period between 2005-2006. The investigations showed mostly on epilithic algae and their subaeric habitats (rock faces within caves and walls at cave entrances). The morphological and cytological variability of algae were studied in fresh samples, in cultures grown on agar plates and in SPURR preparations. A total of 43 algae species was identified, mostly epilithic species and tolerant of low light intensities. The largest group was formed by representatives of the division Chlorophyta (24 species), and then the division Chrysophyta (Heterokontophyta) - 17 species, with 9 species belonging to the class Bacillariophyceae, 7 species - Xanthophyceae and 1 species representing the class Eustigmatophyceae. Dinophyta (2 species) constituted the last and the smallest group. Among the collected algae, the following species deserve special attention: Thelesphaera alpina, Bracteacoccus minor, Trachychloron simplex, Tetracystis intermedia and T. cf. isobilateralis. The last species was not earlier found in Europe. Identification of species was greatly aided by examination of cell ultrastructure, which provided an array of further features, increasing chances of correct species identification. Furthermore, the studies focused that algae, although usually remaining under dominance of cyanobacteria, excellently differentiate this special area and even enrich it.
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 10.

Tytuł:: Algi – przyszłość z morza
Algae – future from the sea
Autorzy:: Kępska, D
Olejnik, Ł.
Tematy:: algi
agar
alginian
biopaliwa
alga
alginate
biodiesel; Pokaż więcej
Wydawca:: Stowarzyszenie Inżynierów i Techników Przemysłu Chemicznego. Zakład Wydawniczy CHEMPRESS-SITPChem
Powiązania:: https://bibliotekanauki.pl/articles/141854.pdf Link otwiera się w nowym oknie
Opis:: Algi są organizmami fotosyntetyzującymi, prokariotycznymi albo eukariotycznymi. Ich komórki zawierają aminokwasy, witaminy, składniki mineralne, NNKT, aosainę,polifenole, kwasy o silnym działaniu nawilżającym i pobudzające krążenie krwi polisacharydy, a także β- karoten i karotenoidy. Ze względu na swój bogaty skład chemiczny, biomasa glonów znalazła zastosowanie w przemyśle spożywczym, farmaceutycznym i kosmetycznym. Preparaty z alg, stosowane jako suplementy diety i składniki środków upiększających, cechuje wysoka czystość chemiczna i efektywność działania. Do najlepiej poznanych polisacharydów alg należą: agar oraz alginian. Ponadto, prowadzone są badania dotyczące zastosowania alg jako źródła alternatywnej energii w postaci biopaliw, a także w procesie oczyszczania ścieków.
Algae are photosynthetic prokaryotic or eukaryotic organisms. Their cells contain amino acids, vitamins, minerals, essential fatty acids, aosain, polyphenols, a potent moisturizing acids, polysaccharides, which are stimulating blood circulation, β-carotene and carotenoids. With such a rich chemical composition, biomass of algae has been used in food, pharmaceutical and cosmetic industries. Preparations of algae used as dietary supplements and beauty measures are characterized by high chemical purity and effectiveness. The best known algal polysaccharides are: agar and alginate. In addition, there is a research conducted on the use of algae as an alternative source of energy in the form of biofuels as well as in waste water treatment.
Dostawca treści:: Biblioteka Nauki

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