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<article 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" xmlns:ali="http://www.niso.org/schemas/ali/1.0/" article-type="research-article" dtd-version="1.2" xml:lang="en"><front><journal-meta><journal-id journal-id-type="publisher-id">Ecological genetics</journal-id><journal-title-group><journal-title xml:lang="en">Ecological genetics</journal-title><trans-title-group xml:lang="ru"><trans-title>Экологическая генетика</trans-title></trans-title-group></journal-title-group><issn publication-format="print">1811-0932</issn><issn publication-format="electronic">2411-9202</issn><publisher><publisher-name xml:lang="en">Eco-Vector</publisher-name></publisher></journal-meta><article-meta><article-id pub-id-type="publisher-id">9302</article-id><article-id pub-id-type="doi">10.17816/ecogen16485-89</article-id><article-categories><subj-group subj-group-type="toc-heading" xml:lang="en"><subject>Genetic toxicology</subject></subj-group><subj-group subj-group-type="toc-heading" xml:lang="ru"><subject>Генетическая токсикология</subject></subj-group><subj-group subj-group-type="article-type"><subject>Research Article</subject></subj-group></article-categories><title-group><article-title xml:lang="en">Influence of γ-irradiation on the expression of encoding ABA metabolism enzymes in barley embryos</article-title><trans-title-group xml:lang="ru"><trans-title>Влияние γ-облучения на экспрессию генов, кодирующих ферменты метаболизма абсцизовой кислоты в зародышах семян ячменя</trans-title></trans-title-group></title-group><contrib-group><contrib contrib-type="author"><name-alternatives><name xml:lang="en"><surname>Bitarishvili</surname><given-names>Sofia V.</given-names></name><name xml:lang="ru"><surname>Битаришвили</surname><given-names>София Валерьяновна</given-names></name></name-alternatives><address><country country="RU">Russian Federation</country></address><bio xml:lang="en"><p>Jr Researcher, Laboratory of Radiobiology and Ecotoxicology of Plants</p></bio><bio xml:lang="ru"><p>младший научный сотрудник лаборатории радиобиологии и экотоксикологии растений</p></bio><email>bitarishvili.s@gmail.com</email><xref ref-type="aff" rid="aff1"/></contrib><contrib contrib-type="author"><name-alternatives><name xml:lang="en"><surname>Bondarenko</surname><given-names>Vladimir S.</given-names></name><name xml:lang="ru"><surname>Бондаренко</surname><given-names>Владимир Сергеевич</given-names></name></name-alternatives><address><country country="RU">Russian Federation</country></address><bio xml:lang="en"><p>PhD, Leading Researcher, Laboratory for the Study of the Effects of Agrocenoses Exposure to Non-ionizing Radiation</p></bio><bio xml:lang="ru"><p>канд. биол. наук, ведущий научный сотрудник лаборатории исследования действия неионизирующих излучений на агроценозы</p></bio><email>bvs79@mail.ru</email><xref ref-type="aff" rid="aff1"/></contrib><contrib contrib-type="author"><name-alternatives><name xml:lang="en"><surname>Geras’kin</surname><given-names>Stanislav A.</given-names></name><name xml:lang="ru"><surname>Гераськин</surname><given-names>Станислав Алексеевич</given-names></name></name-alternatives><address><country country="RU">Russian Federation</country></address><bio xml:lang="en"><p>Doctor of Science, Professor, Head of the Laboratory of Radiobiology and Ecotoxicology of Plants</p></bio><bio xml:lang="ru"><p>д-р биол. наук, заведующий лабораторией главный научный сотрудник лаборатории радиобиологии и экотоксикологии растений</p></bio><email>stgeraskin@gmail.com</email><xref ref-type="aff" rid="aff1"/></contrib></contrib-group><aff-alternatives id="aff1"><aff><institution xml:lang="en">Russian Institute of Radiology and Agroecology</institution></aff><aff><institution xml:lang="ru">Всероссийский научно-исследовательский институт радиологии и агроэкологии</institution></aff></aff-alternatives><pub-date date-type="pub" iso-8601-date="2018-12-15" publication-format="electronic"><day>15</day><month>12</month><year>2018</year></pub-date><volume>16</volume><issue>4</issue><issue-title xml:lang="en"/><issue-title xml:lang="ru"/><fpage>85</fpage><lpage>89</lpage><history><date date-type="received" iso-8601-date="2018-08-23"><day>23</day><month>08</month><year>2018</year></date><date date-type="accepted" iso-8601-date="2018-12-10"><day>10</day><month>12</month><year>2018</year></date></history><permissions><copyright-statement xml:lang="en">Copyright ©; 2018, Bitarishvili S.V., Bondarenko V.S., Geras’kin S.A.</copyright-statement><copyright-statement xml:lang="ru">Copyright ©; 2018, Битаришвили С.В., Бондаренко В.С., Гераськин С.А.</copyright-statement><copyright-year>2018</copyright-year><copyright-holder xml:lang="en">Bitarishvili S.V., Bondarenko V.S., Geras’kin S.A.</copyright-holder><copyright-holder xml:lang="ru">Битаришвили С.В., Бондаренко В.С., Гераськин С.А.</copyright-holder><ali:free_to_read xmlns:ali="http://www.niso.org/schemas/ali/1.0/"/><license><ali:license_ref xmlns:ali="http://www.niso.org/schemas/ali/1.0/">http://creativecommons.org/licenses/by/4.0</ali:license_ref></license></permissions><self-uri xlink:href="https://journals.eco-vector.com/ecolgenet/article/view/9302">https://journals.eco-vector.com/ecolgenet/article/view/9302</self-uri><abstract xml:lang="en"><p><bold>Background</bold>. Small doses of radiation stimulate the growth and development of plants including seed germination. ABA plays a key role not only in seed dormancy and germination but also in the regulation of adaptive reactions of plants.</p> <p><bold>The aim of our work</bold> was to study the effect of γ-irradiation of barley seeds in a small doses on the expression of genes encoding ABA biosynthesis enzyme 9-cis-epoxycarotenoid dioxygenase (HvNCED1) and catabolism enzyme ABA 8’-hydroxylase (HvABA8’OH-1).</p> <p><bold>Materials and Methods</bold>. The barley seeds were irradiated at dose range of 4–50 Gy at a dose rate of 60 Gy/h, the radiation source was 60Co. The study was carried out in the embryos within the first 30 hours after germination. Relative gene expression was investigated using real-time PCR (RT-PCR).</p> <p><bold>Results</bold>. It was shown that γ-irradiation of barley seeds changes the expression of ABA biosynthesis and catabolism genes in all experimental groups.</p> <p><bold>Conclusion</bold>. This alterations can lead to a decrease the ABA content under irradiation with stimulating doses and increase the biosynthesis of phytohormone under irradiation with inhibitory dose.</p></abstract><trans-abstract xml:lang="ru"><p>Изучено влияние γ-облучения семян ячменя сорта Нур в дозах 4–50 Гр на экспрессию генов, кодирующих ферменты биосинтеза абсцизовой кислоты (АБК), диоксигеназу 9-цис-эпоксикаротиноидов (HvNCED1) и катаболизма АБК 8’-гидроксилазу (HvABA8’OH-1) в зародышах семян ячменя в первые 30 часов прорастания. Показано, что гамма-облучение семян ячменя изменяет экспрессию генов, кодирующих ферменты биосинтеза и катаболизма АБК, во всех экспериментальных группах, что может обусловить снижение содержания АБК при использовании стимулирующих доз облучения и увеличить потенциал синтеза фитогормона при использовании ингибирующей дозы.</p></trans-abstract><kwd-group xml:lang="en"><kwd>barley</kwd><kwd>γ-irradiation</kwd><kwd>ABA</kwd><kwd>HvNCED1</kwd><kwd>HvABA8’OH</kwd><kwd>real-time PCR</kwd><kwd>gene expression</kwd></kwd-group><kwd-group xml:lang="ru"><kwd>γ-облучение</kwd><kwd>абсцизовая кислота (АБК)</kwd><kwd>HvNCED1</kwd><kwd>HvABA8’OH-1</kwd><kwd>ПЦР в реальном времени</kwd><kwd>экспрессия генов</kwd></kwd-group><funding-group><award-group><award-id></award-id></award-group></funding-group></article-meta></front><body></body><back><ref-list><ref id="B1"><label>1.</label><mixed-citation>Finkelstein R. Abscisic Acid synthesis and response. 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