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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">5439</article-id><article-id pub-id-type="doi">10.17816/ecogen2229-34</article-id><article-categories><subj-group subj-group-type="toc-heading" xml:lang="en"><subject>Articles</subject></subj-group><subj-group subj-group-type="toc-heading" xml:lang="ru"><subject>Статьи</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">Transfer of Sym-plasmids into symbiotically active and asymbiotic rhizobia strains: properties of recombinants and possible evolutionary consequences</article-title><trans-title-group xml:lang="ru"><trans-title>ПЕРЕНОС SYM-ПЛАЗМИД В СИМБИОТИЧЕСКИ АКТИВНЫЕ И АСИМБИОТИЧЕСКИЕ ШТАММЫ РИЗОБИЙ: СВОЙСТВА РЕКОМБИНАНТОВ И ВОЗМОЖНЫЕ ЭВОЛЮЦИОННЫЕ ПОСЛЕДСТВИЯ</trans-title></trans-title-group></title-group><contrib-group><contrib contrib-type="author"><name-alternatives><name xml:lang="en"><surname>Provorov</surname><given-names>Nikolay A</given-names></name><name xml:lang="ru"><surname>Проворов</surname><given-names>Николай Александрович</given-names></name></name-alternatives><email>provorov@newmail.ru</email><xref ref-type="aff" rid="aff1"/></contrib><contrib contrib-type="author"><name-alternatives><name xml:lang="en"><surname>Fokina</surname><given-names>I G</given-names></name><name xml:lang="ru"><surname>Фокина</surname><given-names>И Г</given-names></name></name-alternatives><xref ref-type="aff" rid="aff1"/></contrib><contrib contrib-type="author"><name-alternatives><name xml:lang="en"><surname>Roumiantseva</surname><given-names>Marina L</given-names></name><name xml:lang="ru"><surname>Румянцева</surname><given-names>Марина Львовна</given-names></name></name-alternatives><email>genet@yandex.ru</email><xref ref-type="aff" rid="aff1"/></contrib><contrib contrib-type="author"><name-alternatives><name xml:lang="en"><surname>Simarov</surname><given-names>Boris V</given-names></name><name xml:lang="ru"><surname>Симаров</surname><given-names>Борис Васильевич</given-names></name></name-alternatives><email>genet@yandex.ru</email><xref ref-type="aff" rid="aff1"/></contrib></contrib-group><aff-alternatives id="aff1"><aff><institution xml:lang="en">All-Russia Research Institute for Agricultural Microbiology, Saint-Petersburg, RF</institution></aff><aff><institution xml:lang="ru">Всероссийский научно-исследовательский институт сельскохозяйственной микробиологии, Санкт-Петербург, РФ</institution></aff></aff-alternatives><pub-date date-type="pub" iso-8601-date="2004-06-15" publication-format="electronic"><day>15</day><month>06</month><year>2004</year></pub-date><volume>2</volume><issue>2</issue><issue-title xml:lang="en">VOL 2, NO2 (2004)</issue-title><issue-title xml:lang="ru">ТОМ 2, №2 (2004)</issue-title><fpage>29</fpage><lpage>34</lpage><history><date date-type="received" iso-8601-date="2016-11-14"><day>14</day><month>11</month><year>2016</year></date></history><permissions><copyright-statement xml:lang="en">Copyright ©; 2004, Provorov N.A., Fokina I.G., Roumiantseva M.L., Simarov B.V.</copyright-statement><copyright-statement xml:lang="ru">Copyright ©; 2004, Проворов Н.А., Фокина И.Г., Румянцева М.Л., Симаров Б.В.</copyright-statement><copyright-year>2004</copyright-year><copyright-holder xml:lang="en">Provorov N.A., Fokina I.G., Roumiantseva M.L., Simarov B.V.</copyright-holder><copyright-holder xml:lang="ru">Проворов Н.А., Фокина И.Г., Румянцева М.Л., Симаров Б.В.</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/5439">https://journals.eco-vector.com/ecolgenet/article/view/5439</self-uri><abstract xml:lang="en"><p>Transfer of Sym-plasmids from the clover rhizobia to avirulent mutants of the same rhizobia species or of alfalfa rhizobia resulted in recombinants with a restored symbiotic activity. Transfer of these plasmids into the wild type isogenic strains lead to a decrease of their symbiotic activity. These data confirm the hypothesis on the crucial role of avirulent rhizobia strains in the transfer of Sym-plasmids which directs evolution of these bacteria</p></abstract><trans-abstract xml:lang="ru"><p>При переносе Sym-плазмид ризобий клевера в асимбиоти-ческие мутанты этого же вида ризобий, а также ризобий люцерны получены рекомбинанты, у которых восстановилась способность к азотфиксирующему симбиозу с бобовыми растениями. При переносе этих плазмид в изогенные штаммы дикого типа наблюдали снижение их симбиотической активности. Полученные данные подтверждают гипотезу о том, что асимби-отические штаммы ризобий играют важную роль в переносе Sym-плазмид, который определяет эволюцию этих бактерий</p></trans-abstract><kwd-group xml:lang="ru"><kwd>клубеньковые бактерии</kwd><kwd>бобовые растения</kwd><kwd>ХОЗЯЙСКАЯ СПЕЦИФИЧНОСТЬ</kwd><kwd>SYM-ПЛАЗМИДЫ</kwd><kwd>эволюция симбиоза</kwd><kwd>АЗОТФИКСИРУЮЩАЯ АКТИВНОСТЬ</kwd><kwd>АГРОБАКТЕРИИ</kwd><kwd>ПЕРЕНОС ГЕНОВ</kwd></kwd-group></article-meta></front><body></body><back><ref-list><ref id="B1"><label>1.</label><mixed-citation>Лакин Г.Ф. Биометрия (4-е издание). -М., Высш. школа, 1990. -352 с.</mixed-citation></ref><ref id="B2"><label>2.</label><mixed-citation>Проворов Н.А. Популяционная генетика клубеньковых бактерий//Журн. общ. биологии. -2000. -Т. 61. -N 3. -С. 229-257.</mixed-citation></ref><ref id="B3"><label>3.</label><mixed-citation>Проворов Н.А., Аронштам А.А. Генетика симбиотической азотфиксации у клубеньковых бактерий//Итоги науки и техники, сер. микробиол. 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