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<article xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:ali="http://www.niso.org/schemas/ali/1.0/" article-type="research-article" dtd-version="1.2" xml:lang="en"><front><journal-meta><journal-id journal-id-type="publisher-id">Ecological genetics</journal-id><journal-title-group><journal-title xml:lang="en">Ecological genetics</journal-title><trans-title-group xml:lang="ru"><trans-title>Экологическая генетика</trans-title></trans-title-group></journal-title-group><issn publication-format="print">1811-0932</issn><issn publication-format="electronic">2411-9202</issn><publisher><publisher-name xml:lang="en">Eco-Vector</publisher-name></publisher></journal-meta><article-meta><article-id pub-id-type="publisher-id">603873</article-id><article-id pub-id-type="doi">10.17816/ecogen603873</article-id><article-categories><subj-group subj-group-type="toc-heading" xml:lang="en"><subject>Ecosystems metagenomics</subject></subj-group><subj-group subj-group-type="toc-heading" xml:lang="ru"><subject>Метагеномика экосистем</subject></subj-group><subj-group subj-group-type="article-type"><subject>Research Article</subject></subj-group></article-categories><title-group><article-title xml:lang="en">Bacterial genera associated with nitrogen cycle in microbial communities of chernozems</article-title><trans-title-group xml:lang="ru"><trans-title>Бактериальные роды, связанные с циклом азота в микробных сообществах черноземов</trans-title></trans-title-group></title-group><contrib-group><contrib contrib-type="author"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0002-2960-0670</contrib-id><contrib-id contrib-id-type="scopus">57218822292</contrib-id><contrib-id contrib-id-type="researcherid">HJZ-5162-2023</contrib-id><contrib-id contrib-id-type="spin">6002-9327</contrib-id><name-alternatives><name xml:lang="en"><surname>Boyarshin</surname><given-names>Konstantin S.</given-names></name><name xml:lang="ru"><surname>Бояршин</surname><given-names>Константин Сергеевич</given-names></name></name-alternatives><address><country country="RU">Russian Federation</country></address><bio xml:lang="en"><p>Cand. Sci. (Biology)</p></bio><bio xml:lang="ru"><p>канд. биол. наук</p></bio><email>ulmus-04@yandex.ru</email><xref ref-type="aff" rid="aff1"/></contrib><contrib contrib-type="author"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0001-8329-4670</contrib-id><name-alternatives><name xml:lang="en"><surname>Adamova</surname><given-names>Valeria V.</given-names></name><name xml:lang="ru"><surname>Адамова</surname><given-names>Валерия Владиславовна</given-names></name></name-alternatives><address><country country="RU">Russian Federation</country></address><bio xml:lang="en"><p>Cand. Sci. (Biology)</p></bio><bio xml:lang="ru"><p>канд. биол. наук</p></bio><email>adamova@bsu.edu.ru</email><xref ref-type="aff" rid="aff1"/></contrib><contrib contrib-type="author"><contrib-id contrib-id-type="orcid">https://orcid.org/0009-0003-3460-8401</contrib-id><name-alternatives><name xml:lang="en"><surname>Zheng</surname><given-names>Wentao</given-names></name><name xml:lang="ru"><surname>Чжен</surname><given-names>Веньтао</given-names></name></name-alternatives><address><country country="RU">Russian Federation</country></address><email>zhengwentaoo@126.com</email><xref ref-type="aff" rid="aff1"/></contrib><contrib contrib-type="author"><name-alternatives><name xml:lang="en"><surname>Nikitinskaya</surname><given-names>Ekaterina V.</given-names></name><name xml:lang="ru"><surname>Никитинская</surname><given-names>Екатерина Вадимовна</given-names></name></name-alternatives><address><country country="RU">Russian Federation</country></address><email>nikitinskajacat@yandex.ru</email><xref ref-type="aff" rid="aff2"/></contrib><contrib contrib-type="author"><contrib-id contrib-id-type="orcid">https://orcid.org/0009-0007-5139-0394</contrib-id><name-alternatives><name xml:lang="en"><surname>Obukhova</surname><given-names>Olga Y.</given-names></name><name xml:lang="ru"><surname>Обухова</surname><given-names>Ольга Юрьевна</given-names></name></name-alternatives><address><country country="RU">Russian Federation</country></address><email>1064261@bsu.edu.ru</email><xref ref-type="aff" rid="aff1"/></contrib><contrib contrib-type="author"><contrib-id contrib-id-type="orcid">https://orcid.org/0009-0008-3849-3564</contrib-id><name-alternatives><name xml:lang="en"><surname>Kolkova</surname><given-names>Marina V.</given-names></name><name xml:lang="ru"><surname>Колкова</surname><given-names>Марина Вадимовна</given-names></name></name-alternatives><address><country country="RU">Russian Federation</country></address><email>mvk3105@mail.ru</email><xref ref-type="aff" rid="aff1"/></contrib><contrib contrib-type="author"><name-alternatives><name xml:lang="en"><surname>Bespalova</surname><given-names>Olga S.</given-names></name><name xml:lang="ru"><surname>Беспалова</surname><given-names>Ольга Сергеевна</given-names></name></name-alternatives><address><country country="RU">Russian Federation</country></address><email>olga9078@mail.ru</email><xref ref-type="aff" rid="aff1"/></contrib><contrib contrib-type="author"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0002-9509-5115</contrib-id><name-alternatives><name xml:lang="en"><surname>Klyueva</surname><given-names>Violetta V.</given-names></name><name xml:lang="ru"><surname>Клюева</surname><given-names>Виолетта Викторовна</given-names></name></name-alternatives><address><country country="RU">Russian Federation</country></address><email>klyueva@bsu.edu.ru</email><xref ref-type="aff" rid="aff1"/></contrib><contrib contrib-type="author"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0003-4474-0919</contrib-id><name-alternatives><name xml:lang="en"><surname>Degtyareva</surname><given-names>Kristina A.</given-names></name><name xml:lang="ru"><surname>Дегтярева</surname><given-names>Кристина Александровна</given-names></name></name-alternatives><address><country country="RU">Russian Federation</country></address><email>degtyareva@bsu.edu.ru</email><xref ref-type="aff" rid="aff1"/></contrib><contrib contrib-type="author"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0003-3189-8178</contrib-id><name-alternatives><name xml:lang="en"><surname>Nesteruk</surname><given-names>Lubov V.</given-names></name><name xml:lang="ru"><surname>Нестерук</surname><given-names>Любовь Викторовна</given-names></name></name-alternatives><address><country country="RU">Russian Federation</country></address><bio xml:lang="en"><p>Cand. Sci. (Biology)</p></bio><bio xml:lang="ru"><p>канд. биол. наук</p></bio><email>nesteruk@bsu.edu.ru</email><xref ref-type="aff" rid="aff1"/></contrib><contrib contrib-type="author"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0001-9180-1257</contrib-id><name-alternatives><name xml:lang="en"><surname>Kurkina</surname><given-names>Yulia N.</given-names></name><name xml:lang="ru"><surname>Куркина</surname><given-names>Юлия Николаевна</given-names></name></name-alternatives><address><country country="RU">Russian Federation</country></address><bio xml:lang="en"><p>Cand. Sci. (Biology)</p></bio><bio xml:lang="ru"><p>канд. биол. наук</p></bio><email>kurkina@bsu.edu.ru</email><xref ref-type="aff" rid="aff1"/></contrib><contrib contrib-type="author"><contrib-id contrib-id-type="orcid">https://orcid.org/0009-0006-7571-2493</contrib-id><name-alternatives><name xml:lang="en"><surname>Makanina</surname><given-names>Olesya A.</given-names></name><name xml:lang="ru"><surname>Маканина</surname><given-names>Олеся Александровна</given-names></name></name-alternatives><address><country country="RU">Russian Federation</country></address><bio xml:lang="en"><p>Cand. Sci. (Biology)</p></bio><bio xml:lang="ru"><p>канд. биол. наук</p></bio><email>makanina@bsu.edu.ru</email><xref ref-type="aff" rid="aff1"/></contrib><contrib contrib-type="author"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0002-6976-1452</contrib-id><contrib-id contrib-id-type="scopus">57190344709</contrib-id><name-alternatives><name xml:lang="en"><surname>Ivanova</surname><given-names>Elena S.</given-names></name><name xml:lang="ru"><surname>Иванова</surname><given-names>Елена Сергеевна</given-names></name></name-alternatives><address><country country="RU">Russian Federation</country></address><bio xml:lang="en"><p>Cand. Sci. (Biology)</p></bio><bio xml:lang="ru"><p>канд. биол. наук</p></bio><email>stepinaelena@yandex.ru</email><xref ref-type="aff" rid="aff2"/></contrib><contrib contrib-type="author"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0003-0068-6586</contrib-id><name-alternatives><name xml:lang="en"><surname>Batlutskaya</surname><given-names>Irina V.</given-names></name><name xml:lang="ru"><surname>Батлуцкая</surname><given-names>Ирина Витальевна</given-names></name></name-alternatives><address><country country="RU">Russian Federation</country></address><bio xml:lang="en"><p>Dr. Sci. (Biology)</p></bio><bio xml:lang="ru"><p>д-р биол. наук</p></bio><email>bat@bsu.edu.ru</email><xref ref-type="aff" rid="aff1"/></contrib></contrib-group><aff-alternatives id="aff1"><aff><institution xml:lang="en">Belgorod State University</institution></aff><aff><institution xml:lang="ru">Белгородский государственный национальный исследовательский университет</institution></aff></aff-alternatives><aff-alternatives id="aff2"><aff><institution xml:lang="en">Cherepovets State University</institution></aff><aff><institution xml:lang="ru">Череповецкий государственный университет</institution></aff></aff-alternatives><pub-date date-type="preprint" iso-8601-date="2024-03-27" publication-format="electronic"><day>27</day><month>03</month><year>2024</year></pub-date><pub-date date-type="pub" iso-8601-date="2024-07-17" publication-format="electronic"><day>17</day><month>07</month><year>2024</year></pub-date><volume>22</volume><issue>2</issue><issue-title xml:lang="en"/><issue-title xml:lang="ru"/><fpage>191</fpage><lpage>204</lpage><history><date date-type="received" iso-8601-date="2023-11-02"><day>02</day><month>11</month><year>2023</year></date><date date-type="accepted" iso-8601-date="2024-03-25"><day>25</day><month>03</month><year>2024</year></date></history><permissions><copyright-statement xml:lang="en">Copyright ©; 2024, Eco-Vector</copyright-statement><copyright-statement xml:lang="ru">Copyright ©; 2024, Эко-Вектор</copyright-statement><copyright-year>2024</copyright-year><copyright-holder xml:lang="en">Eco-Vector</copyright-holder><copyright-holder xml:lang="ru">Эко-Вектор</copyright-holder></permissions><self-uri xlink:href="https://journals.eco-vector.com/ecolgenet/article/view/603873">https://journals.eco-vector.com/ecolgenet/article/view/603873</self-uri><abstract xml:lang="en"><p><bold>BACKGROUND</bold>: Reactions associated with the geochemical nitrogen cycle occurring in the soil have a decisive effect on the level of nitrogen availability for green plants. Microorganisms that catalyze them are of interest from the point of view of developing mechanisms for managing soil fertility. In this paper, we focused on bacterial genera associated with nitrogen cycle processes in chernozem soils of the Belgorod Region of Russia.</p> <p><bold>AIM</bold>: To determine the list and quantitative ratios of bacterial genera whose representatives are able to participate in the fixation of atmospheric nitrogen, nitrification and denitrification in the chernozems of the forest-steppe zone of the European part of Russia.</p> <p><bold>MATERIALS AND METHODS</bold>: Samples of arable and non-arable chernozems of three subtypes were collected in June and August 2022. Microbiological profiling based on high-throughput sequencing of amplicons of V3 and V4 region of the 16S rRNA gene with subsequent computational processing of the results was used in the work.</p> <p><bold>RESULTS</bold>: 6 genera of nitrogen-fixing bacteria were found, as well as a group undifferentiated by means of the method used, including genus <italic>Rhizobium</italic>. 8 genera involved in the first and 5 genera involved in the second stage of nitrification were also found. 7 genera have been found whose representatives are capable of denitrification, without taking into account nitrogen-fixing bacteria, which are also capable of carrying out this process.</p> <p><bold>CONCLUSIONS</bold>: Among the bacteria capable of fixing atmospheric nitrogen in the chernozems of the Belgorod region, the genus <italic>Bradyrhizobium</italic> dominates. Among the nitrifiers performing the first stage of nitrification, Ellin6067 and MND1 from the family <italic>Nitrosomonadaceae</italic> predominate. The second stage of nitrification is carried out mainly by bacteria of the genus <italic>Nitrospira</italic>. Of the potential denitrifies, along with nitrogen-fixing genera possessing this ability, representatives of the genera <italic>Rubrobacter</italic> and <italic>Pseudomonas</italic> are the most numerous. The study does not claim to give a complete list of organisms that carry out key chemical transformations of nitrogen compounds in chernozems, however, it allows us to name their important participants.</p></abstract><trans-abstract xml:lang="ru"><p><bold>Актуальность</bold>. Реакции, связанные с геохимическим циклом азота, проходящие в почве, оказывают определяющее влияние на уровень обеспеченности азотом зеленых растений. Микроорганизмы, осуществляющие их катализ, представляют интерес с точки зрения разработки механизмов управления почвенным плодородием. В данной работе мы заострили внимание на бактериальных родах, связанных с процессами азотного цикла в черноземных почвах Белгородской области России.</p> <p><bold>Цель</bold> — определить перечень и количественные соотношения бактериальных родов, представители которых способны участвовать в фиксации атмосферного азота, нитрификации и денитрификации в черноземах лесостепной зоны европейской части России.</p> <p><bold>Материалы и методы</bold>. Пробы пахотных и непахотных черноземов трех подтипов были отобраны в июне и августе 2022 г. В работе применено микробиологическое профилирование на основе высокопроизводительного секвенирования ампликонов вариабельных участков гена 16S рРНК с последующей вычислительной обработкой результатов.</p> <p><bold>Результаты</bold>. Обнаружены 6 родов азотфиксирующих бактерий, а также недифференцируемая в рамках метода группа, включающая род <italic>Rhizobium</italic>. Обнаружены также 8 родов, участвующих в первой, и 5 родов — во второй стадии нитрификации. Найдены 7 родов, представители которых способны к денитрификации, без учета фиксаторов атмосферного азота, так же способных к осуществлению этого процесса.</p> <p><bold>Выводы</bold>. Среди бактерий, способных к фиксации атмосферного азота в черноземах Белгородской области доминирует род <italic>Bradyrhizobium</italic>. Среди нитрификаторов, осуществляющих первую стадию нитрификации, преобладают Ellin6067 и MND1 из семейства <italic>Nitrosomonadaceae</italic>. Вторая стадия нитрификации осуществляется главным образом бактериями рода <italic>Nitrospira</italic>. Из потенциальных денитрификаторов, наряду с обладающими этой способностью азотфиксирующими родами, многочисленны представители родов <italic>Rubrobacter</italic> и <italic>Pseudomonas</italic>. Исследование не претендует на полный перечень организмов, осуществляющих ключевые химические превращения соединений азота в черноземах, однако позволяет назвать их важных участников.</p></trans-abstract><kwd-group xml:lang="en"><kwd>microbiota</kwd><kwd>chernozems</kwd><kwd>diazotrophy</kwd><kwd>nitrification</kwd><kwd>denitrification</kwd></kwd-group><kwd-group xml:lang="ru"><kwd>микробиота</kwd><kwd>черноземы</kwd><kwd>диазотрофия</kwd><kwd>нитрификация</kwd><kwd>денитрификация</kwd></kwd-group><funding-group><award-group><funding-source><institution-wrap><institution xml:lang="ru">Российский научный фонд</institution></institution-wrap><institution-wrap><institution xml:lang="en">Russian Science Foundation</institution></institution-wrap></funding-source><award-id>22‐14‐20024</award-id></award-group><award-group><funding-source><institution-wrap><institution xml:lang="ru">Правительство Белгородской области</institution></institution-wrap><institution-wrap><institution xml:lang="en">The Government of the Belgorod Region</institution></institution-wrap></funding-source></award-group></funding-group></article-meta></front><body></body><back><ref-list><ref id="B1"><label>1.</label><citation-alternatives><mixed-citation xml:lang="en">Osipov AI. 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