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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">zhps</journal-id><journal-title-group><journal-title xml:lang="ru">Журнал прикладной спектроскопии</journal-title><trans-title-group xml:lang="en"><trans-title>Zhurnal Prikladnoii Spektroskopii</trans-title></trans-title-group></journal-title-group><issn pub-type="ppub">0514-7506</issn><publisher><publisher-name>B. I. Stepanov Institute of Physics of the National Academy of Sciences</publisher-name></publisher></journal-meta><article-meta><article-id custom-type="elpub" pub-id-type="custom">zhps-1478</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>СПЕКТРОСКОПИЯ В БИОЛОГИИ И МЕДИЦИНЕ</subject></subj-group><subj-group subj-group-type="section-heading" xml:lang="en"><subject>SPECTROSCOPY IN BIOLOGY AND MEDICINE</subject></subj-group></article-categories><title-group><article-title>Действие техногенных углеводородов на параметры переменной флуоресценции хлорофилла а в листьях саженцев листопадных растений</article-title><trans-title-group xml:lang="en"><trans-title>Effect of Technogenic Hydrocarbons on Chlorophyll a Variable Fluorescence Parameters in Leaves of Seedlings of Deciduous Plants</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>Тюлькова</surname><given-names>Е. Г.</given-names></name><name name-style="western" xml:lang="en"><surname>Tulkova</surname><given-names>E. G.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Гомель</p></bio><bio xml:lang="en"><p>Gomel</p></bio><email xlink:type="simple">tut-3@mail.ru</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>Савченко</surname><given-names>Г. Е.</given-names></name><name name-style="western" xml:lang="en"><surname>Savchenko</surname><given-names>G. E.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Минск</p></bio><bio xml:lang="en"><p>Minsk</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>Кабашникова</surname><given-names>Л. Ф.</given-names></name><name name-style="western" xml:lang="en"><surname>Kabashnikova</surname><given-names>L. F.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Минск</p></bio><bio xml:lang="en"><p>Minsk</p></bio><xref ref-type="aff" rid="aff-2"/></contrib></contrib-group><aff-alternatives id="aff-1"><aff xml:lang="ru"><institution>Гомельский государственный медицинский университет</institution></aff><aff xml:lang="en"><institution>Gomel State Medical University</institution></aff></aff-alternatives><aff-alternatives id="aff-2"><aff xml:lang="ru"><institution>Институт биофизики и клеточной инженерии НАН Беларуси</institution></aff><aff xml:lang="en"><institution>Institute of Biophysics and Cell Engineering of the National Academy of Sciences of Belarus</institution></aff></aff-alternatives><pub-date pub-type="collection"><year>2024</year></pub-date><pub-date pub-type="epub"><day>12</day><month>02</month><year>2024</year></pub-date><volume>91</volume><issue>1</issue><fpage>87</fpage><lpage>96</lpage><permissions><copyright-statement>Copyright &amp;#x00A9; Тюлькова Е.Г., Савченко Г.Е., Кабашникова Л.Ф., 2024</copyright-statement><copyright-year>2024</copyright-year><copyright-holder xml:lang="ru">Тюлькова Е.Г., Савченко Г.Е., Кабашникова Л.Ф.</copyright-holder><copyright-holder xml:lang="en">Tulkova E.G., Savchenko G.E., Kabashnikova L.F.</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://zhps.ejournal.by/jour/article/view/1478">https://zhps.ejournal.by/jour/article/view/1478</self-uri><abstract><p>Последействие техногенных углеводородов (бенз(а)пирена, бутилацетата и о-ксилола) на состояние стрессочувствительной фотосистемы II в листьях саженцев березы повислой, липы мелколистной, клена остролистного и тополя пирамидального оценено по совокупности параметров амплитудно-импульсной модулированной флуориметрии (РАМ). Показано, что степень ответа на токсикацию близка у токсикантов разной природы и зависит от стрессовой предыстории растений: саженцы березы, перенесшие природный стресс, слабее реагировали на химический. Наиболее выраженная реакция на токсикацию и быстрая адаптивность обнаружены в листьях тополя. Самым чувствительным параметром оказался коэффициент нефотохимического тушения флуоресценции qN, повышающийся после обработки углеводородами в 2—5 раз у саженцев разных видов. Безызлучательная диссипация энергии возбуждения является, вероятно, основным механизмом защиты фотосинтетических мембран в условиях химического стресса.</p></abstract><trans-abstract xml:lang="en"><p>Effects of technogenic hydrocarbons (benzоpyrene, butyl acetate and o-xylene) on the state of stress-sensitive photosystem II in the leaves of drooping birch seedlings, small-leaved linden, maple holly and poplar pyramidal were assessed by pulse-amplitude modulated fluorimetry (РАМ). The degree of response to toxication, though being similar for toxic agents of different nature, depended on the previous stress in plants. Indeed, birch seedlings that had undergone natural stress reacted weaker to chemical one. The leaves of poplar showed the highest response to toxicity combined with rapid adaptability. The most sensitive parameter was the coefficient of non-photochemical fluorescence quenching qN, which increased after treatment with hydrocarbons by 2-5 times in seedlings of different species. The nonradiative dissipation of excitation energy is probably the main mechanism for protecting photosynthetic membranes under chemical stress.</p></trans-abstract><kwd-group xml:lang="ru"><kwd>Betula pendula Roth.</kwd><kwd>Acer platanoides L.</kwd><kwd>Tilia cordata Mill.</kwd><kwd>Populus pyramidalis Roz.</kwd><kwd>бенз(а)пирен</kwd><kwd>бутилацетат</kwd><kwd>о-ксилол</kwd><kwd>параметры амплитудно-импульсной модулированной флуориметрии</kwd></kwd-group><kwd-group xml:lang="en"><kwd>Betula pendula Roth.</kwd><kwd>Acer platanoides L.</kwd><kwd>Tilia cordata Mill.</kwd><kwd>Populus pyramidalis Roz.</kwd><kwd>benzоpyrene</kwd><kwd>butyl acetate</kwd><kwd>o-xylene</kwd><kwd>parameters of amplitude-pulse modulated fluorimetry</kwd></kwd-group></article-meta></front><back><ref-list><title>References</title><ref id="cit1"><label>1</label><citation-alternatives><mixed-citation xml:lang="ru">H. Y. Lee, W. S. Chow, Y.-N. Hong. Physiol. 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