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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">10.29235/1029-8940-2022-67-2-181-189</article-id><article-id custom-type="elpub" pub-id-type="custom">vestib-807</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>Влияние эпибрассинолида и его эфиров с серной кислотой на морфометрические параметры подсолнечника Helianthus annuus L. сорта Гелиос</article-title><trans-title-group xml:lang="en"><trans-title>The effect of epibrassinolide and its sulfuric acid esters on the morphometric parameters of sunflower Helianthus annuus L. (cv. Helios)</trans-title></trans-title-group></title-group><contrib-group><contrib contrib-type="author" corresp="yes"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0002-5740-7341</contrib-id><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Хомюк</surname><given-names>Я. В.</given-names></name><name name-style="western" xml:lang="en"><surname>Khamiuk</surname><given-names>Ya. V.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Хомюк Яна Валерьевна ‒ аспирант.</p><p>Бульвар Космонавтов, 21, 224016, Брест</p></bio><bio xml:lang="en"><p>Yana V. Khamiuk ‒ Postgraduate student.</p><p>21, Kosmonavtov Boulevard, 224016, Brest</p></bio><email xlink:type="simple">archibasovayana@gmail.com</email><xref ref-type="aff" rid="aff-1"/></contrib><contrib contrib-type="author" corresp="yes"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0002-9657-0790</contrib-id><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Литвиновская</surname><given-names>Р. П.</given-names></name><name name-style="western" xml:lang="en"><surname>Litvinovskaya</surname><given-names>R. P.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Литвиновская Раиса Павловна ‒ докторр химических наук, главный научный сотрудник.</p><p>Ул. Купревича, 5/2, 220141, Минск</p></bio><bio xml:lang="en"><p>Raisa P. Litvinovskaya ‒ D. Sc. (Chem.), Chief Researcher.</p><p>5/2, Kuprevich Str., 220141, Minsk</p></bio><email xlink:type="simple">archibasovayana@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/0000-0003-4722-2930</contrib-id><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Колбас</surname><given-names>А. П.</given-names></name><name name-style="western" xml:lang="en"><surname>Kolbas</surname><given-names>A. P.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Колбас Александр Петрович ‒ кандидат биологических наук, доцент, начальник Центра экологии.</p><p>Бульвар Космонавтов, 21, 224016, Брест</p></bio><bio xml:lang="en"><p>Aliaksandr P. Kolbas ‒ Ph. D. (Biol.), Associate Professor, director of Ecology center.</p><p>21, Kosmonavtov Boulevard, 224016, Brest</p></bio><email xlink:type="simple">kolbas77@mail.ru</email><xref ref-type="aff" rid="aff-1"/></contrib></contrib-group><aff-alternatives id="aff-1"><aff xml:lang="ru"><institution>Брестский государственный университет имени А.С. Пушкина</institution></aff><aff xml:lang="en"><institution>Brest State A. Pushkin University</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, National Academy of Sciences of Belarus</institution></aff></aff-alternatives><pub-date pub-type="collection"><year>2022</year></pub-date><pub-date pub-type="epub"><day>04</day><month>05</month><year>2022</year></pub-date><volume>67</volume><issue>2</issue><fpage>181</fpage><lpage>189</lpage><permissions><copyright-statement>Copyright &amp;#x00A9; Хомюк Я.В., Литвиновская Р.П., Колбас А.П., 2022</copyright-statement><copyright-year>2022</copyright-year><copyright-holder xml:lang="ru">Хомюк Я.В., Литвиновская Р.П., Колбас А.П.</copyright-holder><copyright-holder xml:lang="en">Khamiuk Y.V., Litvinovskaya R.P., Kolbas A.P.</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/807">https://vestibio.belnauka.by/jour/article/view/807</self-uri><abstract><p>Проведено поэтапное исследование биологической активности 24-эпибрассинолида (ЭБ) и его натриевых солей эфиров с серной кислотой (натрий 2-, 3-, 22и 23-моносульфаты и динатрий 2,3-дисульфат ЭБ) в опытах по влиянию на ростовые параметры и урожайность подсолнечника однолетнего Helianthus annuus L. (сорт Гелиос) в зависимости от условий выращивания. В опытах на беспочвенной среде действие сульфатов ЭБ на рост и развитие растений в концентрации 10–11–10–9 М оказалось незначительным (за исключением динатрий 2,3-дисульфата ЭБ), в большей степени активность изученных соединений проявилась в лабораторном опыте в почвенной культуре. Наибольшее влияние на рост и развитие отмечено в условиях полевых опытов. Показано, что наиболее эффективным и универсальным эфиром по исследуемым параметрам для двух типов обработки (замачивание семян и опрыскивание растений) является динатрий 2,3-дисульфат ЭБ.</p></abstract><trans-abstract xml:lang="en"><p>A step-by-step study of the biological activity of 24-epibrassinolide (EB) and its sodium salts of esters with sulfuric acid (sodium 2-, 3-, 22and 23-monosulfates and disodium 2.3-disulfate EB) was carried out in experiments on the effect on the growth parameters and crop yield of annual sunflower Helianthus annuus L. (Helios variety) depending on growing conditions. In experiments on a groundless medium, the effect of epibrassinolide sulfuric acid esters on primary plant growth at concentrations of 10–11–10–9 М turned out to be insignificant (with the exception of disodium 2.3–disulfate EB), to a greater extent the activity of the studied compounds was marked in laboratory experiment in soil culture. The greatest effect on growth and development plant was noted in field experiments. It is shown that the most effective and universal compound according to the studied parameters for two types of treatment (soaking seeds and spraying plants) is disodium 2.3-disulfate EB.</p></trans-abstract><kwd-group xml:lang="ru"><kwd>Helianthus annuus L.</kwd><kwd>брассиностероиды</kwd><kwd>24-эпибрассинолид</kwd><kwd>эфиры ЭБ с серной кислотой</kwd><kwd>ростстимулирующая активность</kwd><kwd>урожайность</kwd></kwd-group><kwd-group xml:lang="en"><kwd>Helianthus annuus L.</kwd><kwd>brassinosteroids</kwd><kwd>24-epibrassinolide</kwd><kwd>esters of EB with sulfuric acid</kwd><kwd>growth stimulating activity</kwd><kwd>crop yield</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">Brassinosteroids: A Class of Plant Hormones / ed. : S. Hayat, A. Ahmad. – Dordrecht : Springer, 2011. – 462 p.</mixed-citation><mixed-citation xml:lang="en">Hayat S., Ahmad A. (eds.). 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