Sexual reproduction of the Black Sea diatom Climaconeis scalaris (Brébisson) E.J. Cox
Abstract
In laboratory conditions, the process of sexual reproduction of the Black Sea diatom Climaconeis scalaris (Brebisson) E.J. Cox, 1982 was initiated and studied. A crossing system of this species allows both homo- and heterotallic reproduction. The sexual process is allogamous. During active gliding of diploid mother gametangial cells relative to each other, mucilage was excreted, forming a mucilage track. Each gametangium in a pair produced two elongated cylindrical with rounded ends haploid gametes, which were largely morphologically and behaviorally isogamous. The division of the protoplast of the gametangial cell occurred in the transapical plane without rearrangement of gametes. Growing auxospores were located parallel to the parent frustules. Data on changes in the cell size, number of chloroplasts, as well as the position of cardinal points in the life cycle of the investigated species were obtained.
About the Authors
O. I. Davidovich
. Vyazemsky Karadag Scientific Station — natural reserve of the Russian Academy of Sciences, Branch of the A.O. Kovalevsky Institute of Biology of the Southern Seas, Russian Academy of Sciences
Russian Federation
Russian Federation
Science str. 24, Kurortnoe, Feodosia, 298188
N. A. Davidovich
T.I. Vyazemsky Karadag Scientific Station — natural reserve of the Russian Academy of Sciences, Branch of the A.O. Kovalevsky Institute of Biology of the Southern Seas, Russian Academy of Sciences; Institute of Marine and Environmental Sciences, University of Szczecin
Russian Federation
Russian Federation
Science str. 24, Kurortnoe, Feodosia, 298188; Mickiewicza 16a, Szczecin, 70-383
R. Gastineau
Institute of Marine and Environmental Sciences, University of Szczecin
Poland
Poland
Gastineau Romain — Ph.D..
Mickiewicza 16a, Szczecin, 70-383, tel.: +48-91-444-1000
A. Witkowski
Institute of Marine and Environmental Sciences, University of Szczecin
Poland
Poland
Witkowski Andrzej
Mickiewicza 16a, Szczecin, 70-383, tel.: +48-91-444-1000
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Review
For citations:
Davidovich O.I., Davidovich N.A., Gastineau R., Witkowski A. Sexual reproduction of the Black Sea diatom Climaconeis scalaris (Brébisson) E.J. Cox. Vestnik Moskovskogo universiteta. Seriya 16. Biologiya. 2019;74(4):254-261. (In Russ.)
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