Begell House Inc.
International Journal on Algae
IJA
1521-9429
9
4
2007
Species concept and modern problems of systematics of algae
303-327
10.1615/InterJAlgae.v9.i4.10
G. M.
Palamar-Mordvintseva
N. G. Kholodny Institute of Botany, National Academy of Sciences of Ukraine, 2, Tereshchenkovskaya St., 01001 Kiev
P. M.
Tsarenko
Physical and Chemical Institute for Environment and Human Protection Ministry of Education
and Science & National Academy of Sciences of Ukraine Odesa, Ukraine; W. Szafer Institute of Botany Polish Academy of Sciences,
Kraków, Poland; M.G. Kholodny Institute of Botany National Academy of Sciences of Ukraine
Kyiv, Ukraine
A brief history of the species concept development in algology is given. Morphological, biological, and phylogenetic concepts of species are presented. The role of experimental and molecular-genetic studies in clarifying the species concept of eukaryotic algae of the chlorophyte line of evolution and modern problems of systematics of this group are discussed.
Revision of the genus Achnanthes Bory s. lato (Bacillariophyta). 1. Genera Achnanthes Bory s. str. and Achnanthidium Kützing s. str.
328-341
10.1615/InterJAlgae.v9.i4.20
L. N.
Bukhtiyarova
Institute of Evolutionary Ecology, NAS of Ukraine, 37 Lebedeva St., Kiev 03143, Ukraine
This review deals with taxonomic studies of the genus Achnanthes Bory. The diagnoses of the newly described genera separating from the genus Achnanthes Bory s. lato on the basis of SEM studies are given, as well as a list of taxonomic combinations within these genera. The first part of the review includes a discussion of new types of areolae: macroareolae and postmacroareolae, and a new feature − level of frustule heterovalvy, suggested for use in the description of diatom taxa. Improved descriptions of genera Achnanthes s. str. and Achnanthidium Kützing s. str. are presented.
The effect of red light on a photosynthetic apparatus under auto- and photo-heterotrophic growth of Spirulina platensis (Nordst.) Geitl. (Cyanophyta)
342-349
10.1615/InterJAlgae.v9.i4.30
Svetlana I.
Los'
N.G. Kholodny Institute of Botany, National Academy of Sciences of Ukraine, 2, Tereshchenkavskaya St., 01001 Kiev, Ukraine
R. N.
Fomishina
N.G. Kholodny Institute of Botany, National Academy of Sciences of Ukraine, 2, Tereshchenkavskaya St., 01010 Kiev, Ukraine
S. N.
Vasilchenko
N.G. Kholodny Institute of Botany, National Academy of Sciences of Ukraine, 2, Tereshchenkovskaya St., 01001 Kiev, Ukraine
T. O.
Zakharova
N.G. Kholodny Institute of Botany, National Academy of Sciences of Ukraine, 2, Tereshchenkovskaya St., 01001 Kiev, Ukraine
Alexandr A.
Sivash
N. G. Kholodny Institute of Botany, National Academy of Sciences of Ukraine, 2 Tereshchenkivska Str.. Kiev 01601, Ukraine
The effect of red light-emitting diodes (LED) (λmax = 630 nm, Δλ = 20 nm) on a photosynthetic apparatus and the growth of Spirulina platensis (Nordst.) Geitl. were studied under auto- and photo-heterotrophic conditions. It was shown that the addition of red light against the background of luminescent lamps illumination leads to a decrease in the pigment content, whereas the pigment relationship was unchanged. The involvement of glucose into the culture medium further decreases the content of all pigments and changes their relationship on both white and red lights. The red light was favorable for a considerable accumulation of biomass of the alga, the maximal value of which was observed under conditions of photo-heterotrophic growth (by 3.6 times). Based on biochemical and fluorescent indices, a conclusion is drawn that use of the red light by the photosynthetic apparatus of S. platensis is effective. The employment of monochromatic red LED makes it possible to change the spectral composition of artificial light sources, to investigate the specific peculiarities of adaptation of algal cultures to the light regime, and to provide electric energy saving.
Antibacterial activity and biomolecular composition of certain fresh water microalgae collected from River Godavari (India)
350-358
10.1615/InterJAlgae.v9.i4.40
M. Jaya Prakash
Goud
Microbial culture collection laboratory, Department of Microbiology, Kakatiya University, Warangal-506 009, A.P., India
D.
Seshikala
Microbial culture collection laboratory, Department of Microbiology, Kakatiya University, Warangal-506 009, A.P., India
M. A. Singara
Charya
Microbial culture collection laboratory, Department of Microbiology, Kakatiya University, Warangal-506 009, A.P., India
The microalgae are of significant attraction as natural source of bioactive molecules. Twenty-four different fresh water algal species were screened for their antibacterial activity and biomolecules. Bactericidal activity was tested against two gram+ve and four gram−ve bacteria. Maximum antibacterial activity was observed in methanol extracts and least in aqueous extracts. Maximum activity (14 mm) was observed in the extracts of Nostoc, Lyngbya, Mougeotia and Pithophora sp. Gram-positive bacteria were more susceptible than gram-negative bacteria. Thirteen algal species are associated with tannins and phenols, 11 species with steroids, 5 species with flavonoids and 8 species with saponins. Maximum chlorophyll a was recorded with Ulothrix (5.6 mg/g) and least in Tolypothrix (0.5 mg/g). Chlorophyll b was recorded maximum in Vaucheria (4.2 mg/g) and least in Cylindrospermum (0.6 mg/g). Maximum carotenoid content is recorded in Ulothrix (4.5 mg/g) and least in Tolypothrix and Oscillatoria (0.6 mg/g). Range of protein content is 4−20% with maximum yield in Cylindrospermum sp. (20%) and least in Hydrodictyon (4%). Carbohydrate content ranged from 14−35% with maximum yield in Mougeotia (35%) and least in Tolypothrix (14%). Their pharmacological activities and bioactive molecules can be highly exploited.
New representative of the genus Discostella Houck et Klee (Bacillariophyta) from the Eastern Baikal area (Russia)
359-364
10.1615/InterJAlgae.v9.i4.50
S. I.
Genkal
Papanin Institute for Biology of Inland Waters RAS, Settle Borok, Nekouz District, Yaroslavl Region 152742, Russia
N. A.
Bondarenko
Limnological Institute of Siberian Branch of Russian Academy of Sciences,
P.O. Box 4199, Irkutsk 664033, Russia
G. I.
Popovskaya
Limnological Institute Siberian Department of the Russian Academy of Sciences, 3, Ulan-Batorskaya St., 664033, Irkutsk, Russia
As a result of SEM studies of phytoplankton from Lake Nichatka (Eastern Baikal area) a new small-celled species from genus Discostella Houck et Klee (Bacillariophyta) was described. Its description and microphotographs are presented.
Macrophytobenthos of the Black Sea coast of the Kerch peninsular (Crimea, Ukraine)
365-383
10.1615/InterJAlgae.v9.i4.60
S. Ye.
Sadogurskiy
Nikitsky Botanical Gardens− National Sci. Center, Nikita, Yalta 98648, Crimea
The data on spatial distribution and qualitative and quantitative composition of macrophytobenthos are presented by the results of investigations carried out in 2004 at Cape Ak-Burun (Crimea: priority site Takyl; the Black Sea). Variations in values of indices along the coast and in the depths of the Black Sea are characterized. In all, 68 species of macroalgae were registered: Chlorophyta − 13 (19%), Phaeophyta − 19 (28%), and Rhodophyta − 42 (62%). The benthos vegetation biomass reaches 0.7 − 1 kg·m−2 in pseudolittoral (32 species of algae) and 1.5 − 7 kg·m−2 in sublittoral (64 species of algae). It is prudent to distinguish two subzones within the pseudolittoral zone. Algoflora is of a highly expressed oligosaprobic character. As to the quantity of species, the algae with short-vegetating periods are the dominants, as for biomass − the perennial algae predominate. The water area is recommended to be included into the Nature Reserve Fund.
The use of phytoplankton characteristics for estimation of the ecological state of the Tom' River (Russia) in flood-time
384-394
10.1615/InterJAlgae.v9.i4.70
E. Yu.
Mitrofanova
Institute for Water and Environmental Problems of Siberian Branch of RAS,
Barnaul 656038, Altai Krai, Russia
The composition, structure, and abundance of phytoplankton in the Tom' River, from the city of Novokuznetsk to the settlement of Krapivino, were investigated in flood-time (May 23-30, 2005). It has been established that under conditions of higher turbulence and muddiness of river waters, phytoplankton preserve the structure, quantitative characteristics and, as a result, the high potential of biological self-purification, despite the considerable anthropogenic influence on certain river areas.