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Your search keyword '"Adrianov, A. V."' showing total 164 results
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164 results on '"Adrianov, A. V."'

13. A massive bloom of Karenia species (Dinophyceae) off the Kamchatka coast, Russia, in the fall of 2020

Author

Orlova, Tatiana Y., primary, Aleksanin, Anatoly I., additional, Lepskaya, Ekaterina V., additional, Efimova, Kseniya V., additional, Selina, Marina S., additional, Morozova, Tatiana V., additional, Stonik, Inna V., additional, Kachur, Vasily A., additional, Karpenko, Alexander A., additional, Vinnikov, Kirill A., additional, Adrianov, Andrey V., additional, and Iwataki, Mitsunori, additional

Published
2022
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19. Echinoderes xiphophorus sp. nov. – the first deep-water representative of Echinoderidae in the Sea of Japan (Kinorhyncha: Cyclorhagida)

Author

Adrianov, Andrey V. and Maiorova, Anastassya S.

Subjects
Echinorhagata, Kinorhyncha, Echinoderidae, ddc:590, Cyclorhagida, Animalia, Biodiversity, Taxonomy
Abstract

A new species of echinoderid kinorhynchs, Echinoderes xiphophorus sp. nov. collected from oxidized brown silt at the deepest depression in the Sea of Japan, North-West Pacific, is described and illustrated using light and electron microscopy. This new representative of the most speciose kinorhynch genus is characterized by the unique set of spines and tubes and can easily be distinguished from most of its congeners. The second trunk segment bears three pairs of tubes in subdorsal, midlateral and ventrolateral position in both sexes; one pair of tubes on trunk segment 5 in lateroventral position and on trunk segment 8 in sublateral position; aciculate lateroventral spines on trunk segments 6–9; aciculate middorsal spines on trunk segments 4, 6, 8. This species is well recognized by very long tergal extensions of the posteriormost segment, some of the longest within the family Echinoderidae. Males of Echinoderes xiphophorus sp. nov. are well distinguished from all the congeners by extremely long sword-like appendages dorsally to three pairs of penile spines. The species constitutes the first deep-sea representative of the Echinoderidae in the Sea of Japan and the deepest representative of the Kinorhyncha in this sea.

Published
2021

39. Germ plasm-related structures in marine medaka gametogenesis; novel sites of Vasa localization and the unique mechanism of germ plasm granule arising

Author

Reunov, Arkadiy A., primary, Au, Doris W. T., additional, Alexandrova, Yana N., additional, Chiang, Michael W. L., additional, Wan, Miles T., additional, Yakovlev, Konstantin V., additional, Reunova, Yulia A., additional, Komkova, Alina V., additional, Cheung, Napo K. M., additional, Peterson, Drew R., additional, and Adrianov, Andrey V., additional

Published
2019
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40. Studies of the ecosystems associated with hydrothermal vents and cold seeps in the Bering sea (82nd cruise of RV Akademik M.A. Lavrentyev)

Author

Galkin, S. V., primary, Mordukhovich, V. V., additional, Krylova, E. M., additional, Denisov, V. A., additional, Malutin, A. N., additional, Mikhailik, P. E., additional, Polonik, N. S., additional, Sanamyan, N. P., additional, Shilov, V. A., additional, Ivin, V. V., additional, and Adrianov, A. V., additional

Published
2019
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48. Germ plasm-related structures in marine medaka gametogenesis; novel sites of Vasa localization and the unique mechanism of germ plasm granule arising.

Author

Reunov, Arkadiy A., Au, Doris W. T., Alexandrova, Yana N., Chiang, Michael W. L., Wan, Miles T., Yakovlev, Konstantin V., Reunova, Yulia A., Komkova, Alina V., Cheung, Napo K. M., Peterson, Drew R., and Adrianov, Andrey V.

Subjects
OFFSHORE structures, GAMETOGENESIS, BACTERIA, CELL differentiation, OOGENESIS
Abstract

Summary: Germ plasm, a cytoplasmic factor of germline cell differentiation, is suggested to be a perspective tool for in vitro meiotic differentiation. To discriminate between the: (1) germ plasm-related structures (GPRS) involved in meiosis triggering; and (2) GPRS involved in the germ plasm storage phase, we investigated gametogenesis in the marine medaka Oryzias melastigma. The GPRS of the mitosis-to-meiosis period are similar in males and females. In both sexes, five events typically occur: (1) turning of the primary Vasa-positive germ plasm granules into the Vasa-positive intermitochondrial cement (IMC); (2) aggregation of some mitochondria by IMC followed by arising of mitochondrial clusters; (3) intramitochondrial localization of IMC-originated Vasa; followed by (4) mitochondrial cluster degradation; and (5) intranuclear localization of Vasa followed by this protein entering the nuclei (gonial cells) and synaptonemal complexes (zygotene–pachytene meiotic cells). In post-zygotene/pachytene gametogenesis, the GPRS are sex specific; the Vasa-positive chromatoid bodies are found during spermatogenesis, but oogenesis is characterized by secondary arising of Vasa-positive germ plasm granules followed by secondary formation and degradation of mitochondrial clusters. A complex type of germ plasm generation, 'the follicle cell assigned germ plasm formation', was found in late oogenesis. The mechanisms discovered are recommended to be taken into account for possible reconstruction of those under in vitro conditions. [ABSTRACT FROM AUTHOR]

Published
2020
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