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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">boolt</journal-id><journal-title-group><journal-title xml:lang="ru">Бюллетень Государственного Никитского ботанического сада</journal-title><trans-title-group xml:lang="en"><trans-title>Bulletin of the State Nikitsky Botanical Gardens</trans-title></trans-title-group></journal-title-group><issn pub-type="ppub">0513-1634</issn><publisher><publisher-name>Federal State Funded Institution of Science “The Labour Red Banner Order Nikitsky Botanical Gardens – National scientific Center of the RAS”</publisher-name></publisher></journal-meta><article-meta><article-id pub-id-type="doi">10.36305/0513-1634-2021-141-81-90</article-id><article-id custom-type="elpub" pub-id-type="custom">boolt-548</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>ФИЗИОЛОГИЯ РАСТЕНИЙ</subject></subj-group><subj-group subj-group-type="section-heading" xml:lang="en"><subject>PLANT PHYSIOLOGY</subject></subj-group></article-categories><title-group><article-title>ОСОБЕННОСТИ ФОТОСИНТЕЗА И ВОДНОГО РЕЖИМА QUÉRCUS PUBÉSCENS WILLD. В УСЛОВИЯХ ОСЕННЕЙ ЗАСУХИ ЮЖНОГО БЕРЕГА КРЫМА</article-title><trans-title-group xml:lang="en"><trans-title>Features of photosynthesis and water regime of Quércus pubéscens Willd. in the conditions of autumn dry of the Southern Coast of the Crimea</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>Ильницкий</surname><given-names>Олег Антонович</given-names></name><name name-style="western" xml:lang="en"><surname>Ilnitsky</surname><given-names>O. A.</given-names></name></name-alternatives><email xlink:type="simple">noemail@neicon.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>Плугатарь</surname><given-names>Юрий Владимирович</given-names></name><name name-style="western" xml:lang="en"><surname>Plugatar</surname><given-names>Yu. V.</given-names></name></name-alternatives><email xlink:type="simple">noemail@neicon.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>Паштецкий</surname><given-names>Андрей Владимирович</given-names></name><name name-style="western" xml:lang="en"><surname>Pashtetsky</surname><given-names>A. V.</given-names></name></name-alternatives><email xlink:type="simple">noemail@neicon.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>Гиль</surname><given-names>Александр Тарасович</given-names></name><name name-style="western" xml:lang="en"><surname>Gil</surname><given-names>A. T.</given-names></name></name-alternatives><email xlink:type="simple">noemail@neicon.ru</email><xref ref-type="aff" rid="aff-1"/></contrib></contrib-group><aff xml:lang="ru" id="aff-1"><institution>Никитский ботанический сад - Национальный научный центр РАН</institution><country>Russian Federation</country></aff><pub-date pub-type="collection"><year>2021</year></pub-date><pub-date pub-type="epub"><day>20</day><month>01</month><year>2022</year></pub-date><volume>0</volume><issue>141</issue><fpage>81</fpage><lpage>90</lpage><permissions><copyright-statement>Copyright &amp;#x00A9; Ильницкий О.А., Плугатарь Ю.В., Паштецкий А.В., Гиль А.Т., 2022</copyright-statement><copyright-year>2022</copyright-year><copyright-holder xml:lang="ru">Ильницкий О.А., Плугатарь Ю.В., Паштецкий А.В., Гиль А.Т.</copyright-holder><copyright-holder xml:lang="en">Ilnitsky O.A., Plugatar Y.V., Pashtetsky A.V., Gil A.T.</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://boolt.elpub.ru/jour/article/view/548">https://boolt.elpub.ru/jour/article/view/548</self-uri><abstract><p>Определены зоны оптимума и пороговые значения влажности почвы, температуры, освещенности, лимитирующие фотосинтез и транспирацию для Quércus pubéscens Willd. Показаны зависимости скорости нетто-фотосинтеза (Pn) и интенсивности транспирации (Е) от устьичной проводимости (gs), температуры листа (Тл) и влажности почвы (Wп). Определена зависимость между скоростью ксилемного потока в побеге растения (Sf), изменением диаметра этого побега (d) и влажностью почвы. Соотношения процессов фотосинтеза и дыхания, при воздействии почвенной засухи, позволили определить их оптимальные значения: Wп = 26-28%, Pn = 16 - 18 µмоль/м2с, Pt = 2-4 µмоль/м2с. Изучены изменения соотношения между составляющими суммарного дыхания (Pt, Rd, Rph) при воздействии почвенной засухи. Изучение зависимости между скоростью нетто-фотосинтеза, суммарным дыханием и температурой листа позволило определить температурный максимум нетто-фотосинтеза (тепловую точку компенсации): Pn = Pt = 2,0 µмоль/м2с при Тл = 370С. Установлено, что при отсутствии почвенной засухи доля дыхательных затрат (Pt/Pg) от истинного фотосинтеза составляет 20- 23%, а при влажности почвы 8-10% возрастает до 55-58%. Полученные результаты исследований позволили определить оптимальные и ограничивающие условия произрастания данного вида и возможности интродукции его в другие регионы.</p></abstract><trans-abstract xml:lang="en"><p>For Quércus pubéscens Willd. the zones of optimum and threshold values of soil moisture, temperature, illumination, limiting photosynthesis and transpiration, were determined. The dependences of the rate of net photosynthesis (Pn) and the intensity of transpiration (E) on stomatal conductance (gs), leaf temperature (Tl) and soil moisture (Ws) are shown. The relationship between the speed of the xylem flow in the plant shoot (Sf, Rel. units), the change in the diameter of this shoot (d, mm) and soil moisture has been determined. The relationships between the processes of photosynthesis and respiration under the influence of soil drought made it possible to determine their optimal values: Ws = 26 - 28%, Pn = 16 - 18 µmol/m2s, Pt = 2 - 4 μmol/m2s. Changes in the ratio between the components of total respiration (Pt, Rd, Rph) under the influence of soil drought were studied. The relationship between the rate of net photosynthesis, total respiration and leaf temperature made it possible to determine the temperature maximum of net photosynthesis (thermal compensation point): Pn = Pt = 2.0 μmol/m2s, at T = 37°C. It was found that in the absence of soil drought, the share of respiratory expenditure (Rt/Pg) from true photosynthesis is 20 - 23%, and at soil moisture of 8-10% it increases to 55-58%. The obtained research results made it possible to determine the optimal and limiting conditions for the growth of this species and the possibility of its introduction to other regions.</p></trans-abstract><kwd-group xml:lang="ru"><kwd>Quércus pubéscens Willd</kwd><kwd>фотосинтез</kwd><kwd>водный режим</kwd><kwd>почвенная засуха</kwd><kwd>оптимальные и ограничивающие условия внешней среды</kwd></kwd-group><kwd-group xml:lang="en"><kwd>Quércus pubéscens Willd</kwd><kwd>Photosynthesis</kwd><kwd>water regime</kwd><kwd>soil drought</kwd><kwd>optimal and limiting environmental conditions</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">Анненков А.А., Иванов В.Ф., Хохрин А.В., Акимов Ю.А. 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