<?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>0188-4999</journal-id>
<journal-title><![CDATA[Revista internacional de contaminación ambiental]]></journal-title>
<abbrev-journal-title><![CDATA[Rev. Int. Contam. Ambient]]></abbrev-journal-title>
<issn>0188-4999</issn>
<publisher>
<publisher-name><![CDATA[Universidad Nacional Autónoma de México, Instituto de Ciencias de la Atmósfera y Cambio Climático]]></publisher-name>
</publisher>
</journal-meta>
<article-meta>
<article-id>S0188-49992024000100133</article-id>
<article-id pub-id-type="doi">10.20937/rica.54658</article-id>
<title-group>
<article-title xml:lang="es"><![CDATA[Efecto fitotóxico de cuatro surfactantes catiónicos en plantas de lechuga ( Lactuca sativa L.) hidropónica]]></article-title>
<article-title xml:lang="en"><![CDATA[Phytotoxic effect of four cationic surfactants on hydroponic lettuce ( Lactuca sativa L.) plants]]></article-title>
</title-group>
<contrib-group>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Guillén Castillo]]></surname>
<given-names><![CDATA[Oscar Iván]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Rojas Velázquez]]></surname>
<given-names><![CDATA[Ángel Natanael]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Alcalá Jáuregui]]></surname>
<given-names><![CDATA[Jorge Alonso]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Romero Méndez]]></surname>
<given-names><![CDATA[Mauricio Jesús]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Bertolini]]></surname>
<given-names><![CDATA[Vincenzo]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
</contrib-group>
<aff id="Af1">
<institution><![CDATA[,Universidad Autónoma de San Luis Potosí Facultad de Agronomía y Veterinaria ]]></institution>
<addr-line><![CDATA[Soledad de Graciano Sánchez San Luis Potosí]]></addr-line>
<country>Mexico</country>
</aff>
<aff id="Af2">
<institution><![CDATA[,El Colegio de la Frontera Sur Unidad Tapachula ]]></institution>
<addr-line><![CDATA[Tapachula Chiapas]]></addr-line>
<country>Mexico</country>
</aff>
<pub-date pub-type="pub">
<day>00</day>
<month>00</month>
<year>2024</year>
</pub-date>
<pub-date pub-type="epub">
<day>00</day>
<month>00</month>
<year>2024</year>
</pub-date>
<volume>40</volume>
<copyright-statement/>
<copyright-year/>
<self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_arttext&amp;pid=S0188-49992024000100133&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_abstract&amp;pid=S0188-49992024000100133&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_pdf&amp;pid=S0188-49992024000100133&amp;lng=en&amp;nrm=iso"></self-uri><abstract abstract-type="short" xml:lang="es"><p><![CDATA[RESUMEN Los surfactantes se usan en la agricultura como acondicionadores del suelo y componentes de fungicidas, plaguicidas y fertilizantes. Estos materiales son considerados contaminantes que pueden encontrarse en el suelo, ser absorbidos por plantas y animales, y afectar la salud de los humanos cuando se consumen. El objetivo de este estudio fue evaluar la fitotoxicidad de cuatro surfactantes catiónicos: bromuro de hexadecil trimetil amonio (HDTMA), cloruro de octadecil trimetil amonio (OTAC), dodecil amina (DDA) y hexadecil amina (HDA) en un sistema hidropónico de cultivo de lechuga en dosis de 0 a 10 mg/L. Las variables evaluadas fueron: consumo de agua, biomasa seca, área foliar, conductividad eléctrica (CE) y contenido de NO3 -, K+ y Ca2+ en la solución nutritiva. Después de 40 días de exposición a DDA, este no influyó en la biomasa seca de la planta; sin embargo, con la aplicación de 1 mg/L de HDTMA dicha biomasa disminuyó 27 %, con 4 mg/L de OTAC 46 % y con 4 mg/L de HDA 60 %. La disminución del consumo de agua por los surfactantes fue de 27 % con 1 mg/L de HDTMA, 20 % con OTAC y 34 % con HDA a partir de 2 mg/L. La aplicación de DDA no mostro efecto reductor. En la mayoría de las variables el surfactante DDA no afectó la respuesta; además, el surfactante HDA fue el segundo en provocar menor daño al cultivo, ya que no contiene un ion acompañante tóxico como Cl y Br.]]></p></abstract>
<abstract abstract-type="short" xml:lang="en"><p><![CDATA[ABSTRACT Surfactants are used in agriculture as soil conditioners and components of fungicides, pesticides, and fertilizers. These materials are considered contaminants found in the soil. They can be absorbed by plants and animals and can impact human health when consumed. The objective of this study was to evaluate the phytotoxicity of four cationic surfactants: hexadecyl trimethyl ammonium bromide (HDTMA), octadecyl trimethyl ammonium chloride (OTAC), dodecyl amine (DDA), and hexadecyl amine (HDA) in a hydroponic culture system of lettuce in doses of 0 to 10 mg/L. The variables evaluated were water consumption, dry biomass, leaf area, electrical conductivity (EC), and content of NO3 -, K+, and Ca2+ in the nutrient solution. After 40 days of exposure to DDA, this did not influence the dry biomass of the plant; however, the application of 1 mg/L of HDTMA decreased the biomass by 27 %, 46 % with 4 mg/L of OTAC, and 60 % with 4 mg/L of HDA. The decrease in water consumption by surfactants was 27 % with 1 mg/L of HDTMA, 20 % with OTAC, and 34 % with HDA from 2 mg/L, and the application of DDA did not show a reducing effect. In most of the variables, the DDA surfactant did not affect the response; in addition, the HDA surfactant was the second to cause the least damage to the crop because it does not have a toxic companion ion such as Cl and Br.]]></p></abstract>
<kwd-group>
<kwd lng="es"><![CDATA[toxicidad]]></kwd>
<kwd lng="es"><![CDATA[tensioactivos]]></kwd>
<kwd lng="es"><![CDATA[sales de amonio cuaternario]]></kwd>
<kwd lng="es"><![CDATA[cultivo sin suelo]]></kwd>
<kwd lng="es"><![CDATA[raíz flotante]]></kwd>
<kwd lng="en"><![CDATA[toxicity]]></kwd>
<kwd lng="en"><![CDATA[surfactants]]></kwd>
<kwd lng="en"><![CDATA[quaternary ammonium salts]]></kwd>
<kwd lng="en"><![CDATA[soilless farming]]></kwd>
<kwd lng="en"><![CDATA[floating hydroponic system]]></kwd>
</kwd-group>
</article-meta>
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