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<article article-type="research-article" dtd-version="1.3" 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" xml:lang="ru"><front><journal-meta><journal-id journal-id-type="publisher-id">vestnik-bio-msu</journal-id><journal-title-group><journal-title xml:lang="ru">Вестник Московского университета. Серия 16. Биология</journal-title><trans-title-group xml:lang="en"><trans-title>Vestnik Moskovskogo universiteta. Seriya 16. Biologiya</trans-title></trans-title-group></journal-title-group><issn pub-type="ppub">0137-0952</issn><publisher><publisher-name>Lomonosov Moscow State University,  School of Biology</publisher-name></publisher></journal-meta><article-meta><article-id pub-id-type="doi">10.55959/MSU0137-0952-16-78-3-6</article-id><article-id custom-type="elpub" pub-id-type="custom">vestnik-bio-msu-1260</article-id><article-categories><subj-group subj-group-type="heading"><subject>Research Article</subject></subj-group><subj-group subj-group-type="section-heading" xml:lang="ru"><subject>ОРИГИНАЛЬНОЕ ИССЛЕДОВАНИЕ</subject></subj-group><subj-group subj-group-type="section-heading" xml:lang="en"><subject>RESEARCH ARTICLE</subject></subj-group></article-categories><title-group><article-title>Первичные процессы фотосинтеза Thalassiosira weissflogii при воздействии ципрофлоксацина</article-title><trans-title-group xml:lang="en"><trans-title>Primary photosynthetic processes of Thalassiosira weissflogii under the effect of ciprofloxacin</trans-title></trans-title-group></title-group><contrib-group><contrib contrib-type="author" corresp="yes"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0002-7344-0256</contrib-id><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Тодоренко</surname><given-names>Д. А.</given-names></name><name name-style="western" xml:lang="en"><surname>Todorenko</surname><given-names>D. A.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Тодоренко Дарья Алексеевна – канд. биол. наук, науч. сотр. кафедры биофизики биологического факультета. Тел.: 8-495-939-35-03</p><p>119234, г. Москва, Ленинские горы, д. 1, стр. 12</p></bio><bio xml:lang="en"><p>Department of Biophysics, Faculty of Biology</p><p>1–12 Leninskie gory, Moscow, 119234</p></bio><email xlink:type="simple">todorenko@mail.bio.msu.ru</email><xref ref-type="aff" rid="aff-1"/></contrib><contrib contrib-type="author" corresp="yes"><contrib-id contrib-id-type="orcid">https://orcid.org/0009-0001-0451-8718</contrib-id><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Сидоченко</surname><given-names>Н. Д.</given-names></name><name name-style="western" xml:lang="en"><surname>Sidochenko</surname><given-names>N. D.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Сидоченко Никита Дмитриевич – студент. Тел.: 8-495-952-89-01</p><p>117198, г. Москва, ул. Миклухо-Маклая, д. 6</p></bio><bio xml:lang="en"><p>6 Miklukho-Maklaya st., Moscow, 117198</p></bio><email xlink:type="simple">ssddnikita@gmail.com</email><xref ref-type="aff" rid="aff-2"/></contrib><contrib contrib-type="author" corresp="yes"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0001-9737-4516</contrib-id><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Байжуманов</surname><given-names>А. А.</given-names></name><name name-style="western" xml:lang="en"><surname>Baizhumanov</surname><given-names>A. A.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Байжуманов Адиль Ануарович – канд. биол. наук, ст. науч. сотрудник кафедры биофизики биологического факультета. Тел.: 8-495-939-35-03</p><p>119234, г. Москва, Ленинские горы, д. 1, стр. 12</p></bio><bio xml:lang="en"><p>Department of Biophysics, Faculty of Biology</p><p>1–12 Leninskie gory, Moscow, 119234</p></bio><email xlink:type="simple">adilbayzhumanov@biophys.msu.ru</email><xref ref-type="aff" rid="aff-1"/></contrib><contrib contrib-type="author" corresp="yes"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0002-0511-7983</contrib-id><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Братковская</surname><given-names>Л. Б.</given-names></name><name name-style="western" xml:lang="en"><surname>Bratkovskaya</surname><given-names>L. B.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Братковская Любовь Борисовна – канд. биол. наук, вед. науч. сотр. кафедры общей экологии и гидробиологии биологического факультета. Тел.: 8-495-939-25-18</p><p>119234, г. Москва, Ленинские горы, д. 1, стр. 12</p></bio><bio xml:lang="en"><p>Department of General Ecology and Hydrobiology, Faculty of Biology</p><p>1–12 Leninskie gory, Moscow, 119234</p></bio><email xlink:type="simple">profkom-bio@mail.ru</email><xref ref-type="aff" rid="aff-1"/></contrib><contrib contrib-type="author" corresp="yes"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0002-6164-5625</contrib-id><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Маторин</surname><given-names>Д. Н.</given-names></name><name name-style="western" xml:lang="en"><surname>Matorin</surname><given-names>D. N.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Маторин Дмитрий Николаевич – докт. биол. наук, проф., вед. науч. сотр. кафедры биофизики биологического факультета. Тел.: 8-495-939-35-03</p><p>119234, г. Москва, Ленинские горы, д. 1, стр. 12</p></bio><bio xml:lang="en"><p>Department of Biophysics, Faculty of Biology</p><p>1–12 Leninskie gory, Moscow, 119234</p></bio><email xlink:type="simple">dnmatorin@mail.ru</email><xref ref-type="aff" rid="aff-1"/></contrib></contrib-group><aff-alternatives id="aff-1"><aff xml:lang="ru"><institution>Московский государственный университет имени М.В. Ломоносова</institution><country>Россия</country></aff><aff xml:lang="en"><institution>Lomonosov Moscow State University</institution><country>Russian Federation</country></aff></aff-alternatives><aff-alternatives id="aff-2"><aff xml:lang="ru"><institution>Российский университет дружбы народов</institution><country>Россия</country></aff><aff xml:lang="en"><institution>Peoples’ Friendship University of Russia</institution><country>Russian Federation</country></aff></aff-alternatives><pub-date pub-type="collection"><year>2023</year></pub-date><pub-date pub-type="epub"><day>20</day><month>11</month><year>2023</year></pub-date><volume>78</volume><issue>3</issue><fpage>186</fpage><lpage>194</lpage><permissions><copyright-statement>Copyright &amp;#x00A9; Тодоренко Д.А., Сидоченко Н.Д., Байжуманов А.А., Братковская Л.Б., Маторин Д.Н., 2023</copyright-statement><copyright-year>2023</copyright-year><copyright-holder xml:lang="ru">Тодоренко Д.А., Сидоченко Н.Д., Байжуманов А.А., Братковская Л.Б., Маторин Д.Н.</copyright-holder><copyright-holder xml:lang="en">Todorenko D.A., Sidochenko N.D., Baizhumanov A.A., Bratkovskaya L.B., Matorin D.N.</copyright-holder><license xml:lang="ru" license-type="creative-commons-attribution" xlink:href="https://creativecommons.org/licenses/by/4.0/" xlink:type="simple"><license-p>Данная работа распространяется под лицензией Creative Commons Attribution 4.0.</license-p></license><license xml:lang="en" license-type="creative-commons-attribution" xlink:href="https://creativecommons.org/licenses/by/4.0/" xlink:type="simple"><license-p>This work is licensed under a Creative Commons Attribution 4.0 License.</license-p></license></permissions><self-uri xlink:href="https://vestnik-bio-msu.elpub.ru/jour/article/view/1260">https://vestnik-bio-msu.elpub.ru/jour/article/view/1260</self-uri><abstract><p>Фторхинолоновые антибиотики, такие как ципрофлоксацин, активно использовались в медицинской практике, в том числе в пандемию COVID-19, для подавления побочных бактериальных инфекций. Широкое применение и неправильная утилизация приводят к появлению антибиотиков в окружающей среде, что может оказывать воздействие на природные водные организмы, включая фитопланктон. Воздействие фторхинолоновых антибиотиков на процессы фотосинтеза диатомовых микроводорослей, которые являются основными продуцентами в морских экосистемах, мало изучено. В работе исследовано воздействие антибиотика ципрофлоксацина на первичные процессы фотосинтеза морской диатомовой микроводоросли Thalassiosira weissflogii. Показано, что ципрофлоксацин воздействует на работу фотосистемы II (ФСII), препятствуя передаче поглощенной энергии от возбужденных молекул хлорофилла антенны к реакционному центру (РЦ) ФСII (φDo). При воздействии ципрофлоксацина выявлено снижение эффективности донирования электрона к Р680+ (FV / FO), ингибирование квантового выхода ФСII (FV / FM), снижение доли активных РЦ (ABS / RC) и увеличение диссипации поглощенной энергии на РЦ (DIo / RC). Показано, что механизм действия ципрофлоксацина связан с повреждением РЦ ФСII. Ципрофлоксацин усиливает светочувствительность микроводорослей и вызывает увеличение количества продуктов перекисного окисления липидов. Предлагается использование параметров флуоресценции хлорофилла для анализа воздействия антибиотиков на микроводоросли.</p></abstract><trans-abstract xml:lang="en"><p>Fluoroquinolone antibiotics such as ciprofloxacin have been actively used in medical practice, including the COVID-19 pandemic, to suppress adverse bacterial infections. Widespread application and improper disposal have resulted in the ubiquity of antibiotics in the environment, which can affect aquatic life, including phytoplankton. The effect of fluoroquinolone antibiotics on the photosynthetic processes of marine diatoms, which are the main producers in marine ecosystems, has been little studied. In this work the effect of the antibiotic ciprofloxacin on the primary photosynthetic processes in the marine diatom Thalassiosira weissflogii was studied. It has been shown that ciprofloxacin affects the functioning of PSII, preventing the transfer of absorbed energy from the excited antenna chlorophyll molecules to the PSII RC (φDo). Under the influence of ciprofloxacin, a decrease in the efficiency of electron donation to P680+ (FV / FO), inhibition of the quantum yield of PSII (FV / FM), a decrease in the proportion of active RCs (ABS / RC), and an increase in the dissipation of absorbed energy in RCs (DIo / RC) were revealed. It has been shown that the mechanism of action of ciprofloxacin is associated with damage of PSII RC. Ciprofloxacin enhances the photosensitivity of microalgae and causes an increase in lipid peroxidation products. It is proposed to apply the parameters of chlorophyll fluorescence analyzing the effect of antibiotics on microalgae.</p></trans-abstract><kwd-group xml:lang="ru"><kwd>морские диатомовые микроводоросли</kwd><kwd>кривые OJIP</kwd><kwd>фторхинолоновые антибиотики</kwd><kwd>фотосистема II</kwd><kwd>флуоресценция хлорофилла</kwd><kwd>фотоингибирование</kwd></kwd-group><kwd-group xml:lang="en"><kwd>marine diatoms</kwd><kwd>OJIP curves</kwd><kwd>fluoroquinolone antibiotics</kwd><kwd>photosystem II</kwd><kwd>chlorophyll fluorescence</kwd><kwd>photoinhibition</kwd></kwd-group><funding-group><funding-statement xml:lang="ru">Исследование выполнено при финансовой поддержке Российского научного фонда (проект № 22-11-00009).</funding-statement><funding-statement xml:lang="en">The research was funded by Russian Science Foundation, project number 22-11-00009.</funding-statement></funding-group></article-meta></front><back><ref-list><title>References</title><ref id="cit1"><label>1</label><citation-alternatives><mixed-citation xml:lang="ru">Van Doorslaer X., Dewulf J., Van Langenhove H., Demeestere K. 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