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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">phytosanitary</journal-id><journal-title-group><journal-title xml:lang="ru">Фитосанитария. Карантин растений</journal-title><trans-title-group xml:lang="en"><trans-title>Plant Health and Quarantine</trans-title></trans-title-group></journal-title-group><issn pub-type="ppub">2782-327X</issn><publisher><publisher-name></publisher-name></publisher></journal-meta><article-meta><article-id pub-id-type="doi">10.69536/d2760-4051-0503-z</article-id><article-id custom-type="elpub" pub-id-type="custom">phytosanitary-148</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>ДИАГНОСТИКА</subject></subj-group><subj-group subj-group-type="section-heading" xml:lang="en"><subject>DIAGNOSTICS</subject></subj-group></article-categories><title-group><article-title>Изоляция возбудителя бурой бактериальной гнили влагалища листа злаковых культур Pseudomonas fuscovaginae из семян</article-title><trans-title-group xml:lang="en"><trans-title>Isolation of sheath brown rot pathogen Pseudomonas fuscovaginae from seeds</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>Десятерик</surname><given-names>А. А.</given-names></name><name name-style="western" xml:lang="en"><surname>Desyaterik</surname><given-names>A. A.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Десятерик Анастасия Андреевна, младший научный сотрудник отдела организации межлабораторных сличительных испытаний,</p><p>Быково, г. о. Раменский, Московская обл., 140150;</p><p>магистрант,</p><p>Москва, 127434.</p></bio><bio xml:lang="en"><p>Anastasia Desyaterik, Junior Researcher, Interlabolatory Comparisions Organization Department,</p><p>140150, Bykovo, Urban district Ramensky, Moscow Oblast;</p><p>Master’s student ,</p><p>127434, Moscow.</p></bio><email xlink:type="simple">anastasiya.10.00@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>Словарева</surname><given-names>О. Ю.</given-names></name><name name-style="western" xml:lang="en"><surname>Slovareva</surname><given-names>O. Yu.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Словарева Ольга Юрьевна, кандидат биологических наук, старший научный сотрудник отдела организации межлабораторных сличительных испытаний,</p><p>Быково, г. о. Раменский, Московская обл., 140150.</p></bio><bio xml:lang="en"><p>Olga Slovareva, PhD in Biology, Senior Researcher, Interlabolatory Comparisions Organization Department, </p><p>140150, Bykovo, Urban district Ramensky, Moscow Oblast.</p></bio><email xlink:type="simple">slovareva.olga@gmail.com</email><xref ref-type="aff" rid="aff-2"/></contrib><contrib contrib-type="author" corresp="yes"><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Кононова</surname><given-names>Е. П.</given-names></name><name name-style="western" xml:lang="en"><surname>Kononova</surname><given-names>E. P.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Кононова Елена Петровна, агроном лаборатории бактериологии и анализа ГМО ИЛЦ,</p><p>Быково, г. о. Раменский, Московская обл., 140150.</p></bio><bio xml:lang="en"><p>Elena Kononova, Agronomist, Bacteriology and GMO Analysis Laboratory, Laboratory Testing Center,</p><p>140150, Bykovo, Urban district Ramensky, Moscow Oblast.</p></bio><email xlink:type="simple">catamont@yandex.ru</email><xref ref-type="aff" rid="aff-2"/></contrib></contrib-group><aff-alternatives id="aff-1"><aff xml:lang="ru">ФГБУ «Всероссийский центр карантина растений» (ФГБУ «ВНИИКР»);  Российский государственный аграрный университет – МСХА имени К.А. Тимирязева<country>Россия</country></aff><aff xml:lang="en">FGBU “All-Russian Plant Quarantine Center” (FGBU “VNIIKR”); Russian State Agrarian University – Moscow Timiryazev Agricultural Academy<country>Russian Federation</country></aff></aff-alternatives><aff-alternatives id="aff-2"><aff xml:lang="ru">ФГБУ «Всероссийский центр карантина растений» (ФГБУ «ВНИИКР»)<country>Россия</country></aff><aff xml:lang="en">FGBU “All-Russian Plant Quarantine Center” (FGBU “VNIIKR”)<country>Russian Federation</country></aff></aff-alternatives><pub-date pub-type="collection"><year>2023</year></pub-date><pub-date pub-type="epub"><day>21</day><month>11</month><year>2023</year></pub-date><volume>0</volume><issue>4</issue><fpage>67</fpage><lpage>76</lpage><permissions><copyright-statement>Copyright &amp;#x00A9; Десятерик А.А., Словарева О.Ю., Кононова Е.П., 2023</copyright-statement><copyright-year>2023</copyright-year><copyright-holder xml:lang="ru">Десятерик А.А., Словарева О.Ю., Кононова Е.П.</copyright-holder><copyright-holder xml:lang="en">Desyaterik A.A., Slovareva O.Y., Kononova E.P.</copyright-holder><license 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://phytosanitary.vniikr.ru/jour/article/view/148">https://phytosanitary.vniikr.ru/jour/article/view/148</self-uri><abstract><p>Бурая бактериальная гниль влагалища листа злаковых культур – бактериальное заболевание, которому подвержены посевы пшеницы, риса, кукурузы и сорго практически во всех регионах, где их выращивают. Возбудителем является бактерия вида Pseudomonas fuscovaginae (ex Tanii, Miyajima and Akita, 1976) Miyajima, Tanii and Akita (1983), имеющая карантинный статус для ряда стран, которые импортируют пшеницу из России. Для того чтобы улучшить процесс диагностики бактерии Pseudomonas fuscovaginae в фитосанитарных лабораториях, требуется разработка метода изоляции культуры из семян пшеницы. В исследовании растительные экстракты пшеницы, полученные в результате пробоподготовки, инокулировали суспензиями P. fuscovaginae в различных концентрациях и высевали на питательную среду R2A. Колонии P. fuscovaginae, выросшие на чашках со средой R2A, тестировали методом полимеразной цепной реакции в режиме реального времени (ПЦР-РВ), чтобы установить зависимость порогового цикла от концентрации бактерии в пробе. Установлено, что изоляция P. fuscovaginae возможна в случае содержания в пробе бактерии в концентрации 1 * 104 КОЕ/мл и выше, что соответствует пороговому циклу флуоресценции (Ct) 32,0 на амплификаторе «ДТпрайм 5М6» (ООО «ДНК-Технология», Россия) и (Ct) 31,5 на амплификаторе CFX (Bio-Rad, США) при использовании набора «Pseudomonas fuscovaginae-РВ» (ООО «Синтол», Россия). Посев следует выполнять истощающим способом на среду R2A, используя 20 мкл концентрированной вытяжки семян, и осуществлять поиск колоний P. fuscovaginae спустя 3–7 суток после посева. Эта методика рекомендована для проведения исследований в лабораториях в области фитосанитарии и карантина растений.</p></abstract><trans-abstract xml:lang="en"><p>Sheath brown rot is a bacterial disease affecting wheat, rice, corn and sorghum in almost all regions where they are grown. The causative agent is a bacterium of the species Pseudomonas fuscovaginae (ex Tanii, Miyajima and Akita, 1976) Miyajima, Tanii and Akita (1983), of quarantine status for some countries importing Russian wheat. To enhance the diagnosis of the bacterium Pseudomonas fuscovaginae in phytosanitary laboratories, the development of a method for isolating a culture from wheat seeds is required. In the study, wheat plant extracts obtained as a result of sample preparation were inoculated with P. fuscovaginae suspensions in various concentrations and sown on R2A nutrient medium. P. fuscovaginae colonies grown on plates with R2A medium were tested by real-time polymerase chain reaction (RT-PCR) to determine the dependence of the threshold cycle on the bacteria concentration in the sample. It was determined that P. fuscovaginae isolation is possible if the sample contains bacteria in concentration 1 * 104 CFU/ml and higher, which corresponds to a threshold fluorescence cycle (Ct) of 32.0 on the DTprime 5M6 cycler (DNA-Technology, Russia) and (Ct) 31.5 on the CFX cycler (Bio-Rad, USA) when using the “Pseudomonas fuscovaginae-RT” kit (Syntol, Russia). Sowing should be done in a depleting manner on R2A medium using 20 µl of concentrated seed extract and searching for colonies P. fuscovaginae 3–7 days after sowing. This technique is recommended for conducting research in laboratories in the field of phytosanitary and plant protection.</p></trans-abstract><kwd-group xml:lang="ru"><kwd>Фитосанитария</kwd><kwd>молекулярно-генетические методы</kwd><kwd>диагностика</kwd><kwd>ПЦР</kwd><kwd>культурально-морфологические методы</kwd><kwd>морфология бактериальных колоний</kwd><kwd>пшеница</kwd><kwd>потенциальный ущерб сельскохозяйственной продукции</kwd></kwd-group><kwd-group xml:lang="en"><kwd>Phytosanitary</kwd><kwd>molecular genetic methods</kwd><kwd>diagnosis</kwd><kwd>PCR</kwd><kwd>cultural and morphological methods</kwd><kwd>morphology of bacterial colonies</kwd><kwd>wheat</kwd><kwd>potential damage to agricultural products</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">Лавренчук Л.С., Ермошин А.А. Микробиология: практикум. 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