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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">vestib</journal-id><journal-title-group><journal-title xml:lang="ru">Известия Национальной  академии наук Беларуси. Серия биологических наук</journal-title><trans-title-group xml:lang="en"><trans-title>Proceedings of the National Academy of Sciences of Belarus, Biological Series</trans-title></trans-title-group></journal-title-group><issn pub-type="ppub">1029-8940</issn><issn pub-type="epub">2524-230X</issn><publisher><publisher-name>The Republican Unitary Enterprise Publishing House "Belaruskaya Navuka"</publisher-name></publisher></journal-meta><article-meta><article-id pub-id-type="doi">10.29235/1029-8940-2021-66-2-186-193</article-id><article-id custom-type="elpub" pub-id-type="custom">vestib-744</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>Статьи</subject></subj-group></article-categories><title-group><article-title>Фитогормональная активность брассиностероидов лактонной структуры в условиях химического стресса у растений</article-title><trans-title-group xml:lang="en"><trans-title>Phytohormonal activity of lactone-structure brassinosteroids under chemical stress in 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>Кем</surname><given-names>К. Р.</given-names></name><name name-style="western" xml:lang="en"><surname>Kem</surname><given-names>K. R.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Кем Карина Робертовна, науч. сотрудник</p><p>ул. Академическая, 27, 220072, г. Минск</p></bio><bio xml:lang="en"><p>Karina R. Kem, Researcher</p><p>27, Akademicheskaya Str., 220072, Minsk</p></bio><email xlink:type="simple">kem-666@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>Ламан</surname><given-names>Н. А.</given-names></name><name name-style="western" xml:lang="en"><surname>Laman</surname><given-names>N. A.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Ламан Николай Афанасьевич, академик, д-р биол. наук, заведующий лабораторией</p><p>ул. Академическая, 27, 220072, г. Минск</p></bio><bio xml:lang="en"><p>Nikolai A. Laman, Academician, D. Sc. (Biol.), Head of the Laboratory</p><p>27, Akademicheskaya Str., 220072, Minsk</p></bio><email xlink:type="simple">nikolai.laman@gmail.com</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>Копылова</surname><given-names>Н. А.</given-names></name><name name-style="western" xml:lang="en"><surname>Kopylova</surname><given-names>N. A.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Копылова Наталия Александровна, канд. биол. наук, ст. науч. сотрудник</p><p>ул. Академическая, 27, 220072, г. Минск</p></bio><bio xml:lang="en"><p>Natalia A. Kopylova, Ph. D. (Biol.), Senior Researcher</p><p>27, Akademicheskaya Str., 220072, Minsk</p></bio><email xlink:type="simple">natal.kopylova.68@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>Хрипач</surname><given-names>В. А.</given-names></name><name name-style="western" xml:lang="en"><surname>Khripach</surname><given-names>V. A.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Хрипач Владимир Александрович, академик, д-р хим. наук, заведующий лабораторией</p><p>ул. Академика Купревича, 5/2, 220141, г. Минск</p></bio><bio xml:lang="en"><p>Vladimir A. Khripach, Academician, D. Sc. (Chem.), Head of the Laboratory</p><p>5/2, Academician Kuprevich Str., 220141, Minsk</p></bio><email xlink:type="simple">khripach@iboch.by</email><xref ref-type="aff" rid="aff-2"/></contrib></contrib-group><aff-alternatives id="aff-1"><aff xml:lang="ru"><institution>Институт экспериментальной ботаники имени В. Ф. Купревича НАН Беларуси</institution></aff><aff xml:lang="en"><institution>V. F. Kuprevich Institute of Experimental Botany of the National Academy of Sciences of Belarus</institution></aff></aff-alternatives><aff-alternatives id="aff-2"><aff xml:lang="ru"><institution>Институт биоорганической химии НАН Беларуси</institution></aff><aff xml:lang="en"><institution>Institute of Bioorganic Chemistry of the National Academy of&#13;
Sciences of Belarus</institution></aff></aff-alternatives><pub-date pub-type="collection"><year>2021</year></pub-date><pub-date pub-type="epub"><day>11</day><month>05</month><year>2021</year></pub-date><volume>66</volume><issue>2</issue><fpage>186</fpage><lpage>193</lpage><permissions><copyright-statement>Copyright &amp;#x00A9; Кем К.Р., Ламан Н.А., Копылова Н.А., Хрипач В.А., 2021</copyright-statement><copyright-year>2021</copyright-year><copyright-holder xml:lang="ru">Кем К.Р., Ламан Н.А., Копылова Н.А., Хрипач В.А.</copyright-holder><copyright-holder xml:lang="en">Kem K.R., Laman N.A., Kopylova N.A., Khripach V.A.</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://vestibio.belnauka.by/jour/article/view/744">https://vestibio.belnauka.by/jour/article/view/744</self-uri><abstract><p>Исследована зависимость «доза–эффект» в действии брассиностероидов (БС) лактонной структуры на корневую систему и надземную часть проростков льна-долгунца (Linum usitatissimum L.) и ярового ячменя (Hordeum vulgare L.) в условиях химического стресса. Установлена видовая специфичность ростовых реакций на обработку семян смесями БС и глифосата в ингибирующей дозе. Определены диапазоны концентраций, в которых фитогормональная активность БС выражена максимально. При этом отмечается усиление (на проростках ярового ячменя) либо ослабление (на проростках льна-долгунца) ингибирующего эффекта глифосата на корневую систему.</p></abstract><trans-abstract xml:lang="en"><p>The dependence of the action of lactone-structure brassinosteroids in composition with a growth-inhibiting dose of glyphosate on the root system and the aerial part of fiber flax (Linum usitatissimum L.) and spring barley (Hordeum vulgare L.) seedlings was determined. The species specificity of growth responses to seed incrustation by such mixtures was identified. The concentration ranges of brassinosteroids, in which their interaction with the herbicide is most pronounced, were detected. In this case, there is an increase (on spring barley seedlings) or weakening (on fiber flax seedlings) of the inhibitory effect of glyphosate on the root system.</p></trans-abstract><kwd-group xml:lang="ru"><kwd>глифосат</kwd><kwd>N-фосфонометилглицин</kwd><kwd>брассиностероиды</kwd><kwd>эпибрассинолид</kwd><kwd>брассинолид</kwd><kwd>гомобрассинолид</kwd><kwd>инкрустация</kwd><kwd>доза–эффект</kwd><kwd>ростовая реакция</kwd></kwd-group><kwd-group xml:lang="en"><kwd>glyphosate</kwd><kwd>N-phosphonomethylglycine</kwd><kwd>brassinosteroids</kwd><kwd>epibrassinolide</kwd><kwd>brassinolide</kwd><kwd>homobrassinolide</kwd><kwd>incrustation</kwd><kwd>dose-effect</kwd><kwd>growth-response</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">Khripach, V. A. Twenty years of brassinosteroids: steroidal plant hormones warrant better crops for the XXI century / V. A. Khripach, V. N. 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