Begell House Inc.
International Journal on Algae
IJA
1521-9429
15
4
2013
Aspects of Structural Biology of Didymosphenia geminata (Lyngb.) M. Schmidt (Bacillariophyta)
291-310
10.1615/InterJAlgae.v15.i4.10
Izabela
Zgłobicka
Warsaw University of Technology
fouling diatoms
Didymosphenia geminata
cell wall
stalks
chemical composition.
Didymosphenia geminata (Lyngb.) M. Schmidt (Bacillariophyta) is a diatom, which was originally described from the Northern Hemisphere. Recently, a mass development of this species appeared in various, sometimes exotic, regions. D. geminata is a diatom, which produces stalks. Organic material of the stalks, attached to different types of substrates, may strongly affect the surrounding environment as well as animals, plants, and human life. This paper is intended to summarize the information on D. geminata. It is one of the most investigated diatom species in recent years. Nevertheless, little is known about the chemical composition of its cells, as well as its stalk material.
Terrestrial Algae from the Granite Outcrops of River Valleys of the Ukraine
311-330
10.1615/InterJAlgae.v15.i4.20
Tetyana I.
Mikhailyuk
M.G. Kholodny Institute of Botany,
National Academy of Sciences of Ukraine,
2 Tereschenkivska Str., Kyiv 01601, Ukraine
terrestrial algae
granite outcrops
river volleys
climatic zones
Teterev River
Ros' River
Yuzhnyi Bug River
Ukraine
The results of an investigation of algae inhabiting granite outcrops of river valleys located in three climatic zones of Ukraine: Polesye (Teterev River), Forest-Steppe (Ros' River), and Steppe (Yuzhnyi Bug River) are presented: 179 species belonging to six divisions of algae (Chlorophyta -108 species, Cyanoprokaryota - 30, Bacillariophyta - 16, Streptophyta - 16, Xanthophyta - 7, Eustigmatophyta - 2). Among these species eight are new species for Ukrainian flora, and about 30 species are rare and noteworthy records. Species composition of algae of studied locations is characterized by notable diversity of green (mainly trebuxiaphycean) and streptophycean algae. Green conjugating algae were diverse on outcrops of the Polesye; cyanoprokaryotes and diatoms are numerous on outcrops of the Forest-Steppe zone; cyanoprokaryotes are characteristic for outcrops of the Steppe zone. Dominant complexes common for all granite outcrops included genera Elliptochloris Tscherm.-Woess, Apatococcus F. Brand emend. Geitler, Desmococcus F. Brand emend. Vischer, Klebsormidium P.C. Silva et al., etc. Specificity to dominant complexes of outcrops of the Teterev River (Polesye) are given by representatives of Trentepohlia E. Martini and Mesotaenium Nageli, of the Ros' River (Steppe zone) - by Chlorogloea Wille, Gloeocapsa Kutz., Prasiolopsis Vischer, etc., of the Yuzhnyi Bug River (Forest-Steppe zone) - by Trentepohlia, Chlorogloea, Dilabifilum Tscherm.-Woess, etc. Two ecological groups of algae (epilithic and chasmoendolithic) are presented on granite outcrops of all investigated valleys: epiliths occurred in shaded places and near the water; chasmoendoliths were found on dry lighted slopes but sometimes also in the shade. Species composition and dominant complexes of algae from granite outcrops depend on conditions of the particular habitat as well as on the climatic zone. Comparison of data on algae from granite outcrops with other stone substrates of the Ukraine shows that species composition of algae is relatively similar on substrates with close chemical peculiarities; physical characters perhaps have less influence on algae.
Morphological Variability, Taxonomy, and Ecology of Species of the Complex Handmannia comta / H. radiosa (Bacillariophyta)
331-354
10.1615/InterJAlgae.v15.i4.30
S. I.
Genkal
Papanin Institute for Biology of Inland Waters RAS, Settle Borok, Nekouz District, Yaroslavl Region 152742, Russia
Bacillariophyta
Centrophyceae
complex Handmannia comta / H. radiosa
morphology
taxonomy
ecology.
The morphological study of 22 populations of the complex Handmannia comta (Ehrenb.) Kociolek et Khursevich / H. radiosa (Grunow) Kociolek et Khursevich from water bodies of different types, geographic location, and trophic status has shown a significant variability in the majority of quantitative (the valve diameter, size of central area, number of striae and marginal fultoportulae in 10 µm, number of satellite pores of central and marginal fultoportulae, number of thin costae in alveoli, number of rings of central fuloportulae, number of rimoportulae, number of punctuate rows in striae) and qualitative (the relief of central area, presence of granules on valve and branching costae among alveoli, arrangement of central processes and rimoportulae, size of alveoli, orientation of rimoportulae slit) morphological characteristics (19) and their overlapping. The obtained results have allowed the author to add to information on H. comta) of H. comta, refer H. radiosa and Cyclotella balatonis Pant. to its synonymy as well as specify the ecology and distribution of H. comta.
Occurrence of Spatoglossum Kutz. (Phaeophycota) at the Coast of Pakistan
355-377
10.1615/InterJAlgae.v15.i4.40
A.
Abbas
Department of Botany, Federal Urdu University of Arts, Science and Technology, Gulshan-e-Iqbal, Karachi-75300, Pakistan
M.
Shameel
Department of Botany, University of Karachi, Karachi-75270, Pakistan
Phaeophycota
Spatoglossum
taxonomy
anatomy
reproduction
Pakistan.
Five species of Spatoglossum were collected from the coastal areas of Karachi (Pakistan) during March 2007 and May 2010. They were investigated in detail for their morphology, anatomy and reproduction. Anatomically their thalli were studied in detail for the first time. Two newly reported species from the coast of Pakistan have also been described taxonomically.
Dynamics of Functional Epigenotypes of Dunaliella viridis Teodor. (Chlorophyta) in Enrichment and Quasi-Continuous Culture
378-394
10.1615/InterJAlgae.v15.i4.50
A.I.
Bozhkov
Research Institute of Biology, V.N. Karazin Kharkov National University, 4 Svobody Sq., Kharkov 61022, Ukraine
E.I.
Sysenko
Research Institute of Biology, V.N. Karazin Kharkov National University, 4, Svobody Sq., Kharkov 61022, Ukraine
N. G.
Menzyanova
Research Institute of Biology, V.N. Karazin Kharkov National University, 4 Svobody Sq., Kharkov 61022, Ukraine
V.Yu.
Kizilova
Research Institute of Biology, V.N. Karazin Kharkov National University, 4, Svobody Sq., Kharkov 61022, Ukraine
Dunaliella viridis
epigenotype
biomass composition
enrichment culturing
quasi-continuous cultivation
The dynamics of Dunaliella viridis (Chlorophyta) epigenotypes in enrichment and quasi-continuous modes of cultivation was studied. It was found that the pattern of nucleic acids, proteins, triacylglicerols, and β-carotene peculiar to certain epigenotypes depend on the conditions of cultivation of microalgae. Quasi-continuous cultivation of D. viridis allows increased biomass yield by 23%, but the specific productivity was three times less compared to the enrichment culture. It was found that the growth rate of the microalgae correlates with the accumulation of exopolysaccharides in the culture medium.
Table of contents
395-400
10.1615/InterJAlgae.v15.i4.60