<?xml version="1.0" encoding="ISO-8859-1"?><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">
<front>
<journal-meta>
<journal-id>1665-1456</journal-id>
<journal-title><![CDATA[Biotecnia]]></journal-title>
<abbrev-journal-title><![CDATA[Biotecnia]]></abbrev-journal-title>
<issn>1665-1456</issn>
<publisher>
<publisher-name><![CDATA[Universidad de Sonora, División de Ciencias Biológicas y de la Salud]]></publisher-name>
</publisher>
</journal-meta>
<article-meta>
<article-id>S1665-14562024000100178</article-id>
<article-id pub-id-type="doi">10.18633/biotecnia.v26.2325</article-id>
<title-group>
<article-title xml:lang="en"><![CDATA[Effect of the concentration and ionic form of nitrogen (N) on photosynthesis, growth and fruit production of blueberry ( Vaccinium corymbosum L.)]]></article-title>
<article-title xml:lang="es"><![CDATA[Efecto de la concentración y forma iónica del nitrógeno (N) en la fotosíntesis, crecimiento y producción de frutos de arándano (Vaccinium corymbosum L.)]]></article-title>
</title-group>
<contrib-group>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Ca&#769;rdenas-Navarro]]></surname>
<given-names><![CDATA[Rau&#769;l]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Luna-Béjar]]></surname>
<given-names><![CDATA[Jesús Alonso]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Castellanos-Morales]]></surname>
<given-names><![CDATA[Vilma del Carmen]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Bravo-Hernandez]]></surname>
<given-names><![CDATA[Nayda Luz]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[López-Pérez]]></surname>
<given-names><![CDATA[Luis]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
</contrib-group>
<aff id="Af1">
<institution><![CDATA[,Universidad Michoacana de San Nicolás de Hidalgo Instituto de Investigaciones Agropecuarias y Forestales ]]></institution>
<addr-line><![CDATA[Tarímbaro Michoacán]]></addr-line>
<country>Mexico</country>
</aff>
<aff id="Af2">
<institution><![CDATA[,Universidad Michoacana de San Nicolás de Hidalgo Facultad de Agrobiología &#8220;Presidente Juárez&#8221; ]]></institution>
<addr-line><![CDATA[Uruapan Michoacán]]></addr-line>
<country>Mexico</country>
</aff>
<pub-date pub-type="pub">
<day>00</day>
<month>12</month>
<year>2024</year>
</pub-date>
<pub-date pub-type="epub">
<day>00</day>
<month>12</month>
<year>2024</year>
</pub-date>
<volume>26</volume>
<copyright-statement/>
<copyright-year/>
<self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_arttext&amp;pid=S1665-14562024000100178&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_abstract&amp;pid=S1665-14562024000100178&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_pdf&amp;pid=S1665-14562024000100178&amp;lng=en&amp;nrm=iso"></self-uri><abstract abstract-type="short" xml:lang="en"><p><![CDATA[Abstract The aim of this work was to evaluate the main effects and the interactions of nitrogen (N) concentration and ammonium (NH4 +): nitrate (NO3 -) proportion in the nutrient solution, on net photosynthesis, plant growth, production and quality of fruits on blueberry (Vaccinium corimbosum L.) plants. The studied factors were N concentration (0.6 and 6.0 mM) and NH4 +: NO3 - proportion (100 % NH4 +, 50 % NH4 + - 50 % NO3 - and 100 % NO3 -). 243 d after the experiment was established, net photosynthesis (PN) was measured and a day after, leaf area (LA), shoots fresh weight (SFW) and roots fresh weight (RFW) were determined. Fruit yield (FY), fruit diameter (FD) and Brix degrees (oBrix) were evaluated in four harvests along fruit production period. The results showed higher values on PN, LA, SFW, FY and FD in plants that received 6.0 mM N as NH4 +; nevertheless, N concentration altered the NH4 +: NO3 - proportion effects and at 0.6 mM N only FY and FD maintained such a pattern. It is concluded that N concentration modifies the effect of NH4 +: NO3 - proportion and it is proposed that the effects of both factors on photosynthesis, growth and fruit production of blueberry were mediated by their interaction with plant carbohydrates availability.]]></p></abstract>
<abstract abstract-type="short" xml:lang="es"><p><![CDATA[Resumen En este trabajo se evaluó la concentración de nitrógeno (N) (0.6 y 6.0 mM), la proporción de amonio (NH4 +): nitrato (NO3 -) (100 % NH4 +, 50 % NH4 + - 50 % NO3 - y 100 % NO3 -) y su interacción, sobre la fotosíntesis neta, el crecimiento de las plantas, la producción y la calidad de los frutos, en arándano (Vaccinium corimbosum L.). Las plantas se mantuvieron por 243 d en un sistema hidropónico y después se midió la fotosíntesis neta (FN), el área foliar (AF), el peso fresco de los brotes (PFB) y el peso fresco de las raíces (PFR). También se evaluó, el rendimiento (RF), diámetro de fruto (DF) y grados Brix (oBrix). Se encotraron los mayores valores en FN, AF, PSB, RF y DF, en las plantas que recibieron 6.0 mM como NH4 +; sin embargo, la concentración de N alteró los efectos de la proporción NH4 +:NO3 - y a 0.6 mM N, solo RF y DF mantuvieron la tendencia inicial registrada. La concentración de N modifica el efecto de la proporción NH4 +:NO3 - y se propone que los efectos de ambos factores sobre la fotosíntesis, el crecimiento y la producción de frutos del arándano estuvieron mediados por su interacción por la disponibilidad de carbohidratos de la planta.]]></p></abstract>
<kwd-group>
<kwd lng="en"><![CDATA[nitrate]]></kwd>
<kwd lng="en"><![CDATA[ammonium]]></kwd>
<kwd lng="en"><![CDATA[quality]]></kwd>
<kwd lng="en"><![CDATA[yield]]></kwd>
<kwd lng="en"><![CDATA[carbohydrates]]></kwd>
<kwd lng="es"><![CDATA[nitrato]]></kwd>
<kwd lng="es"><![CDATA[amonio, calidad]]></kwd>
<kwd lng="es"><![CDATA[rendimiento]]></kwd>
<kwd lng="es"><![CDATA[carbohidratos]]></kwd>
</kwd-group>
</article-meta>
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