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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">hydrophysics</journal-id><journal-title-group><journal-title xml:lang="ru">Фундаментальная и прикладная гидрофизика</journal-title><trans-title-group xml:lang="en"><trans-title>Fundamental and Applied Hydrophysics</trans-title></trans-title-group></journal-title-group><issn pub-type="ppub">2073-6673</issn><issn pub-type="epub">2782-5221</issn><publisher><publisher-name>St. Petersburg Research Center of the Russian Academy of Sciences</publisher-name></publisher></journal-meta><article-meta><article-id custom-type="elpub" pub-id-type="custom">hydrophysics-829</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>ТЕХНИЧЕСКАЯ ГИДРОФИЗИКА</subject></subj-group><subj-group subj-group-type="section-heading" xml:lang="en"><subject>TECHNICAL HYDROPHYSICS</subject></subj-group></article-categories><title-group><article-title>Новые оптические подходы в исследовании фотофизиологических характеристик цианобактерий in situ</article-title><trans-title-group xml:lang="en"><trans-title>New Optical Approaches in Studying Photophysiological Parameters of Cyanobacteria in situ</trans-title></trans-title-group></title-group><contrib-group><contrib contrib-type="author" corresp="yes"><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Кузьминов</surname><given-names>Ф. И.</given-names></name><name name-style="western" xml:lang="en"><surname>Kuzminov</surname><given-names>F. I.</given-names></name></name-alternatives><bio xml:lang="en"><p>New Brunswick</p><p>Moscow</p></bio><email xlink:type="simple">fedor.kouzminov@rutgers.edu</email><xref ref-type="aff" rid="aff-1"/></contrib><contrib contrib-type="author" corresp="yes"><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Ширшин</surname><given-names>Е. А.</given-names></name><name name-style="western" xml:lang="en"><surname>Shirshin</surname><given-names>E. A.</given-names></name></name-alternatives><bio xml:lang="en"><p>Moscow</p></bio><xref ref-type="aff" rid="aff-2"/></contrib><contrib contrib-type="author" corresp="yes"><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Горбунов</surname><given-names>М. Ю.</given-names></name><name name-style="western" xml:lang="en"><surname>Gorbunov</surname><given-names>M. Yu.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Нью Брансвик</p></bio><bio xml:lang="en"><p>New Brunswick</p></bio><xref ref-type="aff" rid="aff-3"/></contrib><contrib contrib-type="author" corresp="yes"><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Фадеев</surname><given-names>В. В.</given-names></name><name name-style="western" xml:lang="en"><surname>Fadeev</surname><given-names>V. V.</given-names></name></name-alternatives><bio xml:lang="en"><p>Moscow</p></bio><xref ref-type="aff" rid="aff-2"/></contrib></contrib-group><aff-alternatives id="aff-1"><aff xml:lang="ru"><institution>Отделение изучения морских и прибрежных зон, Университет Ратгерс; Московский государственный университет им. М. В. Ломоносова</institution><country>Россия</country></aff><aff xml:lang="en"><institution>Department of Marine and Coastal Sciences, Rutgers University; M. V. Lomonosov Moscow State University</institution><country>Russian Federation</country></aff></aff-alternatives><aff-alternatives id="aff-2"><aff xml:lang="ru"><institution>Московский государственный университет им. М. В. Ломоносова</institution><country>Россия</country></aff><aff xml:lang="en"><institution>M. V. Lomonosov Moscow State University</institution><country>Russian Federation</country></aff></aff-alternatives><aff-alternatives id="aff-3"><aff xml:lang="ru"><institution>Отделение изучения морских и прибрежных зон, Университет Ратгерс</institution><country>Соединённые Штаты Америки</country></aff><aff xml:lang="en"><institution>Department of Marine and Coastal Sciences, Rutgers University</institution><country>United States</country></aff></aff-alternatives><pub-date pub-type="collection"><year>2015</year></pub-date><pub-date pub-type="epub"><day>17</day><month>11</month><year>2022</year></pub-date><volume>8</volume><issue>1</issue><fpage>41</fpage><lpage>47</lpage><permissions><copyright-statement>Copyright &amp;#x00A9; Кузьминов Ф.И., Ширшин Е.А., Горбунов М.Ю., Фадеев В.В., 2022</copyright-statement><copyright-year>2022</copyright-year><copyright-holder xml:lang="ru">Кузьминов Ф.И., Ширшин Е.А., Горбунов М.Ю., Фадеев В.В.</copyright-holder><copyright-holder xml:lang="en">Kuzminov F.I., Shirshin E.A., Gorbunov M.Y., Fadeev V.V.</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://hydrophysics.spbrc.ru/jour/article/view/829">https://hydrophysics.spbrc.ru/jour/article/view/829</self-uri><abstract><p>Рассматриваются новые подходы к определению фотофизических и фотофизиологических параметров фотосинтетических организмов, которые могут быть использованы для определения их физиологического состояния in situ, количественной оценки эффективности фотосинтеза и первичной продукции. На примере исследования физиологического состояния цианобактерий демонстрируются возможности метода индукции и релаксации флуоресценции и метода нелинейной лазерной флуорометрии. Показаны возможности совместного использования этих методов при исследовании механизмов защиты от избыточного освещения (нефотохимического тушения). В частности, приведены результаты, которые демонстрируют, что хлорофиллсодержащий светособирающий комплекс цианобактерий не принимает непосредственного участия в механизме нефотохимического тушения. Данные по исследованию влияния спектральных характеристик внешнего освещения на физиологическое состояние цианобактерий свидетельствуют о том, что спектральные свойства и интенсивность освещения, при котором выращивались культуры цианобактерий, существенным образом влияют на количество и соотношения фикобилин- и хлорофиллсодержащих комплексов, а также на содержание пигментов в этих комплексах. Эти изменения проявляются в измеряемых фотофизиологических параметрах, что говорит о возможности оценки световых условий, при которых росли клетки цианобактерий in situ при помощи методов флуорометрии.</p></abstract><trans-abstract xml:lang="en"><p>In this work we examine new approaches for measurment of photophysical and photophysiological parameters of photosynthetic organisms that could be used to assess their physiological state, photosynthetic efficiency, and primary productivity. On the example of cyanobacteria, we demonstrate the potential of Fluorescence Induction and Relaxation technique (FIRe) and Non-linear Laser Fluorimetry (NLF) in assessing physiological state of phytoplankton. We apply these methods to study mechanism of high light tolerance (non-photochemical quenching). In particular, we show that chlorophyll-containing light harvesting complex of cyanobacteria does not directly participate in the mechanism of non-photochemical quenching. Studies on the effect of spectral properties on the physiological state of cyanobacteria demonstrate that light induced changes in the content, quantity and ratio of chlorophyll- and phycobilin-containing light harvesting complexes could be determined from measured photophysiological parameters. Thus, FIRe and NLF could be used to assess light growth conditions in situ.</p></trans-abstract><kwd-group xml:lang="ru"><kwd>цианобактерии</kwd><kwd>фотосинтез</kwd><kwd>флуорометрия</kwd><kwd>фотоадаптация.</kwd></kwd-group><kwd-group xml:lang="en"><kwd>cyanobacteria</kwd><kwd>photosynthesis</kwd><kwd>fluorimetry</kwd><kwd>photoadaptation</kwd></kwd-group><funding-group><funding-statement xml:lang="ru">Работа выполнена при поддержке Российского научного фонда (грант № 14-17-00451)</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">Shaw B. P., Sahu S. 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